View source for Sonic the Hedgehog (TV series)/Development

{{back}}[[Category:Development]]
''[[Sonic the Hedgehog (TV series)|Sonic the Hedgehog]]'' went through a number of concepts and changes through its development process. What follows is a collection and summary of what that entailed.

==Development==
===Conception and season one===
[[File:SonicTH-SatAM Early Art EPCOT INNOVENTIONS.png|thumb|A display featuring early ''Sonic the Hedgehog'' art. Circa 1994 at EPCOT'S INNOVENTIONS.{{ref|1=https://web.archive.org/web/20230429175516/https://www.youtube.com/watch?v=xhBPuiPY8uY}}]]
After recognizing the potential of [[Sonic the Hedgehog]] as a brand, [[sega:Sega of America|Sega of America]] CEO [[sega:Tom Kalinske|Tom Kalinske]] knew he wanted to take the character and have a television show built around him. While working at Mattel in the 1980's, Kalinske had taken a similar approach with the "[[wikipedia:Masters of the Universe|Masters of the Universe]]" toy line, and felt it would serve Sonic in a similar fashion. In 1991, Kalinske initially met with Haim Saban to talk over the idea of an animated Sonic series.{{ref|https://web.archive.org/web/20191218132522/https://medium.com/@romanojay/interview-with-tom-kalinske-former-ceo-of-sega-of-america-781d3d680b6f}}

Saban was not the only party interested in producing a ''Sonic the Hedgehog'' television series. Andy Heyward, the CEO of [[sega:DIC Entertainment|DIC Entertainment]], reached out to Sega of America over the matter, expressing interest in the license.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}} The company was no stranger to adapting video game properties to television, having previously worked on various ''Super Mario Bros.'' series and ''[[wikipedia:Captain N: The Game Master|Captain N: The Game Master]]''. Soon, the studio pitched the premise to Sega, with Sonic being part of a "Freedom Team" fighting against the evil Dr. Robotnik. A deal between the two companies was made, giving DIC the rights to move ahead on development and production.

Needing to find a home for the series, DIC reached out to the American television network ABC, and were pleasantly surprised by the results of their meeting. 
{{quote|1=At the time, the most prized placement for an animated series was Saturday morning on one of the networks. You got the best license fees and you also got the best ratings in that arena. So that was always your first port of call when you had a hot property...you go to the network. We did that with Sonic, and they gave us an on the air commitment immediately. And that's unusual! Normally a network will make a development deal with you which basically gives them the right to buy the property at a later date and expect you to write a pilot script and do some development art and they put off their decision. But...if the property is really hot they'll give you an on-air commitment right on the spot and that's what happened with Sonic.|2=Robby London, Executive Producer of ''Sonic the Hedgehog''{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}}}} 

With the show greenlit, ABC requested that [[Len Janson]] and Chuck Menville be the story editors of the series. The duo were seasoned animation veterans, having worked on numerous projects together including ''The Real Ghostbusters'' where they served as both writers and story editors.{{ref|http://ghostarchive.org/varchive/EC95zQ6OgFk|2=https://www.youtube.com/watch?v=EC95zQ6OgFk}} Unfortunately, Chuck Menville was unavailable, fighting the final stages of non-Hodgkin's lymphoma.{{ref|1=https://web.archive.org/web/20230605033228/https://www.atogt.com/askoscar/display-person.php?id=40037}} Instead, Len Janson was joined by father-son writing team{{ref|https://web.archive.org/web/20230207072229/https://www.inverse.com/gaming/sonic-hedgehog-chili-dog}} [[Bruce Shelly|Bruce]] and [[Reed Shelly]], who had previously written for both ''The Super Mario Bros. Super Show'' and ''The Adventures of Super Mario Bros. 3''. The three men co-wrote the series Bible, fleshing out the original premise and retooling the supporting cast. Characters that were originally based on the animal friends of the video games were replaced with characters such as [[Bunnie Rabbot]], [[Antoine D' Coolette|Antoine]], and [[Rotor Walrus]] (originally named Boomer){{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=13}} who, along with Sonic, Sally, and [[Miles "Tails" Prower]] would fight against the evil [[Dr. Eggman|Dr. Robotnik]] and his assistant, [[Snively]] (originally named Quizley).{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=19}}

Casting responsibilities for the series were assigned to Marsha Goodman and Virginia McSwain. Knowing that the show was to be pitched to ABC, they wanted to find someone to play Sonic who would appeal to the network executives.{{ref|http://ghostarchive.org/varchive/9XwWHTigA9s|2=https://www.youtube.com/watch?v=9XwWHTigA9s}} The role was offered to [[Jaleel White]], who had made a name for himself playing Steven Q. Urkel on the primetime sitcom ''Family Matters'', at the time a hit on ABC's TGIF lineup. Previously, DIC had approached Jaleel while developing an Urkel-centric animated ''Family Matters'' spin off, and while it was not picked up, it did begin a working relationship with the actor and the animation studio.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}} Having always wanted to play a voice on an animated project, Jaleel accepted. Other well known names were soon attached to the project, including [[Kath Soucie]], [[Jim Cummings]], and [[Bradley Pierce]], the latter of which had recently starred as Chip in Disney's ''Beauty and the Beast''. While the majority of the cast would record episodes together, Jaleel would end up recording his parts separately, due to his hectic schedule.{{ref|http://ghostarchive.org/varchive/9XwWHTigA9s|2=https://www.youtube.com/watch?v=9XwWHTigA9s}} Being a minor, the hours he could work in a given day were legally limited.

Having such faith in the show they were creating, DIC felt ''Sonic the Hedgehog'' could support being both a Saturday morning series and a weekly syndicated series. After getting the green light to make the series in the first place, DIC had a meeting with Mark Pedowitz, the Senior Vice President of Business Affairs and Contracts at ABC, to discuss the possibility of launching the series in both forms concurrently.{{ref|https://web.archive.org/web/20221103180015/https://www.polygon.com/2020/2/18/21140375/sonic-90s-cartoons-streaming-satam-jaleel-white-adventures-of-sonic}} This was not the first time DIC had entered into such an arrangement with ABC, having produced two seasons of ''The Real Ghostbusters'' in 1987 - one for the network, another that aired in syndication at the same time.{{ref|https://web.archive.org/web/20220708044947/https://twitter.com/katewillaert/status/1168937938299891712}} However, ABC made it clear they wanted the series to be exclusive to them, and if DIC pursued making a concurrent version for syndication they would not air ''Sonic'' on Saturday mornings.{{ref|https://web.archive.org/web/20221103180015/https://www.polygon.com/2020/2/18/21140375/sonic-90s-cartoons-streaming-satam-jaleel-white-adventures-of-sonic}} Not wanting to give up the idea, Robby London, who became the executive producer on ''Sonic the Hedgehog'', pitched an idea to his boss, Andy Heyward. The idea was to develop two separate shows - one that would be a "serious and somewhat dark story" that ABC was looking for, and another show that would make "Robotnik more silly" and give him "henchmen that were incompetent," emulating the style of Tex Avery cartoons.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}} Approaching ABC with this new take, DIC emphasized the idea that the version of ''Sonic'' they would air would still be unique, that no one would confuse the two shows because of their vastly different tone, and that it would only help them by bring greater awareness of the Sonic the Hedgehog brand. To DIC's surprise, the network gave the production company the green light to develop both shows.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}}

Bruce and Reed Shelly would step away from ''Sonic the Hedgehog'', creating the more comical ''[[Adventures of Sonic the Hedgehog]]''.{{ref|https://web.archive.org/web/20220407142632/https://www.inverse.com/gaming/sonic-hedgehog-chili-dog}} Len Janson was left to become the showrunner for the network series. Embracing the idea of making a darker animated show, the characters and settings as seen in the pilot "[[Heads or Tails]]" were redesigned for the full series. This slightly more mature feel for the show was reflected in the writing, Len wanting there to be wins and losses for the characters,{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}} made clear in such episodes as "[[Sonic Boom]]" and "[[Ultra Sonic]]." Even so, each episode was a standalone story, told by different writers who were not trying to present an overarching narrative.

As part of the agreement to make a show based on the Sonic the Hedgehog property, Sega maintained approval rights on all aspects of the series - voices, music, scripts, and character designs.{{magref|Retro Gamer|091|31}} DIC's first assigned supervisor from Sega immediately caused conflict in the creative process, knowing nothing about animation production and often giving unclear or contradictory instructions.{{ref|https://ghostarchive.org/varchive/JwKhrGdvn_c|2=https://www.youtube.com/watch?v=JwKhrGdvn_c}} This individual was initially replaced by [[sega:Cynthia Modders|Cynthia Modders]], who worked with DIC until [[sega:Jane Thompson|Jane Thompson]], Sega of America's Director of Licensing and Character Development, stepped in. Often working with DIC in their Burbank office, the relationship between her and DIC proved fruitful, with Robby London feeling she helped the team create better material through the course of their partnership.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}}

===Season two===

[[File:Ben Hurst.png|thumb|Ben Hurst, one of the core creative forces behind season two the ''Sonic the Hedgehog'' television series.{{ref|http://ghostarchive.org/varchive/GVpDEzQgs3M|2=https://www.youtube.com/watch?v=GVpDEzQgs3M}}]]
With the show picked up for a second season, Len wanted to reassess the series, seeing which aspects worked and which ones didn't. Trusting their views on the characters, Len brought in the writing team of [[Ben Hurst]] and [[Pat Allee]], who had written the episode "[[Sonic and Sally]]." Together, the three of them rewatched the entirety of the first season, examining the highs and lows while also brainstorming what could come next. Early on in the two week process of outlining the second season, the idea of treating the thirteen episodes as one long film narrative came up. The only rule would be that, with the exception of the "[[Blast to the Past (Part 1)|Blast to the Past]]" two parter, each episode had to stand on its own merits, as they still had to be friendly to any potential new viewers week to week. 

The creative team was also forced to accommodate two requests from ABC. The first of these was adding a new character that would appeal to the female demographic, resulting in the creation of [[Dulcy the Dragon]]. The second was the insistence of having four, 11-minute episodes focusing on Antoine, played up for comedy. This second request was not met with favor from Ben Hurst, the loss of two full episodes truncating the original intent of the season. 

As pre-production on the second season continued, the designs of the characters were also tweaked. Some were subtle, such as the addition of Sally's vest, while others were vastly different, Janson insisting Rotor be completely redesigned.{{intref|Ben Hurst interview at SAGExpo (August 27, 2006)}}

With a quarter of a million dollars budgeted for each episode, regular production began, the team having a week to turn around each script. The three worked in tandem, with the main swathes of the plot coming from Ben Hurst, character development primarily worked on by Len Janson and Pat Allee, and rough dialogue coming from Hurst that would be polished by Allee and finally Janson. Once the script was complete, it would head off to be storyboarded, with further tweaks done by Len and director [[Ron Myrick]] once the boarding was complete.{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}}{{intref|Ben Hurst interview at SAGExpo (August 27, 2006)}}

While those who worked on the series were excited over what they were creating, there was more than one occasion in which Len was forced to bump heads with not just the executives at ABC, but also those at Sega. One such disagreement occurred during the development of the second season when Ben Hurst set out to define the backstory of Robotnik and Snively. 

{{quote|1=Julian and Snively were part of a space expedition from about 2200 (or thereabouts). Julian attempted a takeover of the colony, but his technology got out of control and he wound up destroying everything, narrowly escaping with his (and Snively's) lives. Meanwhile, back on Earth, a nuclear holocaust had destroyed human life as we knew it - and the animals who survived mutated into sentient beings and built the society which you see in the form of Mobius. Einstein's ideas of the passage of time during faster-than-light space travel kick in and thousands of years have passed by the time Julian and Snively returned to find this "Animal" world. Well, Julian's thought was that in the land of the four-pawed critters, the two-handed man is king and so he set about to take over - as outlined in Blast to the Past.|2=Ben Hurst, writer and associate story editor of ''Sonic the Hedgehog{{ref|https://web.archive.org/web/20230101075005/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/R4OkKOQeON4/m/rYBNdnqb3_4J}}}}

Though the outlined events listed on this "whitepaper" were not intended to be seen on screen during season two, Sega was upset over this drastic turn from the source material they presented. Len stayed firm, defending the continuity the team had come up with, feeling that it was better than the materials Sega had presented them with when the series was initially conceived.{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}}

===Cancellation and attempted relaunches===

The final episode to air, "[[The Doomsday Project]]," ended on a cliffhanger, the team fully expecting to be picked up for a third season. The earliest sketches of a season outline had already been written when word came of the series' cancellation.{{ref|https://web.archive.org/web/20230103051953/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/LJD-zvxnb48/m/NaDH38_BCEQJ}} A number of explanations have been given as to why the show ended prematurely, including disinterest in the show from the new head of ABC's Children's Programming, plus the fact it was often preempted by college football on the west coast.{{ref|http://ghostarchive.org/varchive/tt5ERItK3CM|2=https://www.youtube.com/watch?v=tt5ERItK3CM}} The most prominent reason for the show ending was ratings. In the fall of 1994, Sonic aired at the same time as the Fox Kids program ''Mighty Morphin Power Rangers'',{{ref|https://web.archive.org/web/20221216220652/http://www.inthe90s.com/saturdays.shtml}} which was quickly becoming one of the most popular children's entertainment properties.{{ref|https://web.archive.org/web/20221126210055/https://www.nytimes.com/1994/12/05/us/with-power-rangers-scarce-a-frenzied-search-by-parents.html}} These three elements, when combined, proved to be the demise of the series.{{ref|http://ghostarchive.org/varchive/tt5ERItK3CM|2=https://www.youtube.com/watch?v=tt5ERItK3CM}}

In 1997, DIC began development on a third show featuring Sonic the Hedgehog, ''[[Sonic Underground]]'', this time without Len Janson's involvement. Ben Hurst and Pat Allee were among those invited to an open call for writers to pitch for the new series. Though Ben Hurst was hesitant to go, the meeting led to him becoming the showrunner. While he was able to integrate certain aspects of the "SatAM" aesthetic, the format of ''Underground'' had already been set in stone, the writer unable to shift course and create the third season of former Saturday morning series.{{ref|https://web.archive.org/web/20230103053422/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/_QnS6Xqsr70/m/bBucDGsDsKoJ}}

Communicating with fans online, and recognizing the desire for a third season of ''Sonic the Hedgehog'', Hurst began conceiving ways to resurrect the series as early as September of 1998, while still working on ''Underground''.{{ref|https://web.archive.org/web/20230101084737/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/EEf5Pyt8IXc/m/RZalFsPxUvoJ}} However, he recognized that such a task was nothing short of an uphill battle. During the San Diego Comic Con in August of 1999, Hurst met up with [[Ken Penders]], one of the main writers on the [[Sonic the Hedgehog (Archie comics)|''Sonic the Hedgehog'' comic book]] from [[sega:Archie Comics|Archie Comics]]. After that initial meeting, the two spoke on the phone, discussing the possibility of Ben Hurst writing for the comic.{{ref|https://web.archive.org/web/20230103054126/https://forums.sonicretro.org/index.php?threads/the-ken-penders-chronicles-a-man-you-ken-dependers-on.21670/page-22}} 

{{quote|1=Ben expressed interest in writing for the Sonic comic...As Archie was publishing the SONIC SUPER SPECIAL series at the time, I thought it would be a great idea for Ben to write where he would have taken the series. He suggested that if he did do the story, he'd want to take what he planned and fit it into the series' continuity. So I contacted Justin Gabrie, and told him about Ben's interest. When Ben found out what Archie paid per page for script was nowhere near what he was paid for the scripts he did for the Sonic animated series he worked on, he decided to pass. (Which was sad, because Art Mawhinney would have been assigned to illustrate that particular script.)|2=Ken Penders, writer of Archie's ''Sonic the Hedgehog''{{ref|https://web.archive.org/web/20230103054126/https://forums.sonicretro.org/index.php?threads/the-ken-penders-chronicles-a-man-you-ken-dependers-on.21670/page-22}}}}

With Archie off the table, Ben Hurst turned back to the idea of continuing the series through animation. Though his desire was to write a full thirteen episode season, he also considered the possibility of writing a movie that would wrap things up, either theatrically released or direct to video. On February 29th, 2000,{{ref|https://web.archive.org/web/20000822015837/http://www.teamartail.com/satam/}} Ben had a meeting with Robby London, an executive producer on all three DiC-created ''Sonic'' programs. During this meeting, the pair discussed the many aspects of what it would take for such a project to be greenlit, including the enthusiasm of the fanbase. After the meeting, Ben made an open call on the Usenet group alt.fan.sonic-hedgehog, asking the fans to start mailing in letters to local television network affiliates asking them to air ''Sonic the Hedgehog''. The hope was that, if local stations saw a demand, the prospect of more Sonic in syndication would become a more enticing proposition.{{ref|https://web.archive.org/web/20230101101840/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/KVHYABMAk88/m/dlC8mwr4YucJ}}

At the end of Hurst's meeting with London, the producer gave the writer the contact information of an executive within Sega of America. Not long after, Hurst telephoned the executive, speaking to her about his ideas for continuing the Saturday morning Sonic series as an animated film.{{ref|https://web.archive.org/web/20230103053422/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/_QnS6Xqsr70/m/bBucDGsDsKoJ}} The following day, he received an unprompted call from Ken Penders. 

{{quote|1=The next day, I got a call from Ken Penders, who had been alerted by his contact in their office that I was interested in getting a Sonic movie going. I generously offered to include him in the effort and told him my strategy. Get SEGA to become invested in the idea by hiring us to interview their creative game designers, execs, etc and see if we could develop a story line that would fulfill the third season - and simultaneously give them creative ideas to develop new games. A win-win, situation.|2=Ben Hurst, writer and associate story editor of ''Sonic the Hedgehog{{ref|https://web.archive.org/web/20230103053422/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/_QnS6Xqsr70/m/bBucDGsDsKoJ}}}}

Ken Penders made clear his insider knowledge during an online chat with fans on March 8th, 2000, saying a third season of ''Sonic the Hedgehog'' was in the early stages of development.{{ref|https://web.archive.org/web/20031006224653/http://freepages.rootsweb.com:80/~bauerle/chat2.lis}} He also claimed that the episodes would include elements of the Archie comic books. The idea of melding both the Saturday morning series and the ongoing comic was doubled down in a later online chat that occurred June 1st that same year, this time saying that it would take the form of a movie, and that Hurst was already working on a first draft.{{ref|https://web.archive.org/web/20031006225159/http://freepages.rootsweb.com:80/~bauerle/chat2.txt}}

On August 30th, 2000, Penders went on record that the film version of ''Sonic'' was in "development hell," not getting into any further detail.{{ref|https://web.archive.org/web/20031204214601/http://freepages.rootsweb.com:80/~bauerle/chat3.txt}} Years later, Penders claimed Hurst was being unrealistic in the way he was going about the project, telling him that the "approach would be a non-starter, and I was never able to shake Ben's belief that Sega would be willing to pay us to do the project."{{ref|https://web.archive.org/web/20230103054126/https://forums.sonicretro.org/index.php?threads/the-ken-penders-chronicles-a-man-you-ken-dependers-on.21670/page-22}} This fear was reportedly made clear in a later phone call Hurst had with the same Sega executive he initially contacted.

{{quote|1=I called SEGA back, but I was shocked when the exec "lit" into me, telling me, "People pay US to develop Sonic product, we don't pay them!" Then she hung up on me. Obviously, Penders had related my strategy to them in a less-than-flattering way.|2=Ben Hurst, writer and associate story editor of ''Sonic the Hedgehog{{ref|https://web.archive.org/web/20230103053422/https://groups.google.com/g/alt.fan.sonic-hedgehog/c/_QnS6Xqsr70/m/bBucDGsDsKoJ}}}}

After that call, Ben Hurst pulled back from actively pursuing a continuation of the cartoon series. In 2003, though he was not involved in any active development with Sega or DIC, Hurst began personally fleshing out an outline for what would be an animated film finale for the series. In 2005, he attempted once more to gain interest in bringing back the series.{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}} What that entailed is unknown, and when asked the following year, he refused to comment.{{intref|Ben Hurst interview at SAGExpo (August 27, 2006)}}

==Original pitch concept art==
In ''[[Sonic the Comic]]'' [[Sonic the Comic 012|issue 12]], the "News Zone" column featured a short write-up on the upcoming television series ''Adventures of Sonic the Hedgehog''. While the article did have an image of Dr. Robotnik as he would look in that series, two out of place images were lined up alongside. These images would later be reprinted, along with three others, in the [[Sonic the Poster Mag 1|first issue]] of [[Fleetway]]'s ''[[Sonic the Comic#Sonic the Poster Mag|Sonic the Poster Mag]]'', with the only context being that it was a "sneak peak" of "TV's newest superstar."

As the images did not reflect either ''Sonic'' animated series in their final form, it was quickly surmised that these images were in fact early conceptual drawings as to what a ''Sonic'' series could entail. While the artist is currently unknown, the attached story pitch was most likely written by Phil Harnage, a staff writer at DIC.{{ref|1=https://web.archive.org/web/20220326020520/https://twitter.com/SatamHistorian/status/1507539048432345089}} The material was based on the original [[Sonic the Hedgehog Bible]] from Sega of America, supplied to the studio by Al Nilsen.{{ref|https://web.archive.org/web/20220326020600/https://twitter.com/SatamHistorian/status/1507539056896491525}}
	
The design of Sonic, Sally, and Robotnik in this concept art were also used on a promotional card from European distributor Silvio Berlusconi Communications.
<gallery widths="148px" heights="148px" >
SonicTH-SatAM Original Pitch Character Logo.jpg|Sonic standing upon a hill, an early version of the Saturday morning Sonic logo underneath.
SonicTH-SatAM Concept Art Resistance Is Born.jpg|"The Resistance is Born!" An early, if not the earliest, version of Princess Sally (known at the time as Princess Acorn) fighting off an evil robot with Sonic the Hedgehog.
SonicTH-SatAM Concept Art Freedom Team.jpg|"The Freedom Team," featuring redesigned versions of [[Pocky|Johnny Lightfoot]], [[Picky|Porker Lewis]], [[Rocky|Joe Sushi]], [[Pecky|Tux]], [[Cucky|Chirps]], and [[Flicky]]. These characters would not end up being in the animated ''Sonic the Hedgehog''.
SonicTH-SatAM Concept Art Freedom Team Lineart.jpg|Line art of the team.
SonicTH-SatAM Concept Art Freedom Team Lineart Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Robotic Transformation Machine.jpg|Princess Acorn, along with an unnamed Freedom Fighter, are about to enter "Dr. Robotnik's Robotic Transformation Machine" as Robotnik watches from above.
SonicTH-SatAM Concept Art A Hero's Reward.jpg|The "mohawk Sonic" attempts to get a kiss for some good deed, but locks lips with a fish. The alien backdrop points towards a different visual feel the series was originally meant to have.
SonicTH-SatAM Lineart Pitch OriginalSally.jpg|Lineart of the fish kiss.
SonicTH-SatAM Concept Art Sally 9.jpg|Princess Acorn reading to Tux.
SonicTH-SatAM Concept Art Sally 9 Zoom.jpg|Close-up.
File:EarlySonicCartoon SalesCard front.JPG|Front of promotional card.
File:EarlySonicCartoon SalesCard back.JPG|Back of promotional card.
</gallery>

==Sonic the Hedgehog (revised Bible)==

The original series Bible for ''Sonic the Hedgehog'' had been revised twice by March 11th, 1992.{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=1}} While the basic premise of the show had already been figured out, many of the details would continue to change over the coming year. Written mostly from the perspective of Sonic, the Bible describes how the show was to focus on Sonic and his band of [[Freedom Fighters]] who came together in the wake of Dr. Robotnik's takeover of [[Mobotropolis]]. The doctor, who stormed the city with his "ROBO SWAT TEAM," sought to capture everyone and subjugate them to his "Veg-O" machine, transforming them into robot slaves.{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=3}} Though Sonic and his friends, including Boomer the Sea Lion, were able to escape, Sonic's [[Uncle Chuck]] and dog [[Muttski]] unfortunately were captured.

In the wake of Robotnik taking over the entire planet, Sonic ended up meeting Princess Sally and a member of the royal guard, Antoine. Both human, they had escaped to the [[Great Forest]] but were tracked down by Robotnik's [[SWATbots]]. Before Robotnik's forces could capture the princess, Sonic rushed into save the pair, the young princess thankful for the rescue. While Antoine immediately took a dislike to the hedgehog, they both joined up with Sonic and the Freedom Fighters, taking refuge in the hidden village of [[Knothole]].

This early series Bible also includes Miles "Tails" Prower as a principle character, a four and a half year old fox who adores Sonic, wears a cowboy hat, and speaks with a southern accent.{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=9}} Living all his life in the Great Forest, he was told by the Freedom Fighters not to venture out and explore the city, even though all he wants is to join them on adventures.{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=10}} Rounding out the cast is [[Nate Morgan]], the former "environmental adviser" to the king.{{fileref|SonicTH-SatAM Revised Bible 1992-03-11.pdf|page=15}} A grandfather figure to Tails, he is described as being a former wizard whose powers did not necessarily come in handy when needed the most.

By the time the script for the series' pilot, "Heads or Tails," was completed, numerous details of Sonic's world had been changed, including Princess Sally and Antoine's species, the accent of Tails, and the removal of Nate Morgan.{{fileref|SonicTH-SatAM Heads or Tails Script 1992-08-06.pdf}}

<gallery>
SonicTH-SatAM Revised Bible 1992-03-11.pdf|The March 11th, 1992 draft of the ''Sonic the Hedgehog Bible''
SonicTH-SatAM Revised Bible 1993-03-10 Cover.jpg|The cover of the March 10th, 1993 draft.
SonicTH-SatAM Revised Bible 1993-03-10 Page 1.jpg|Page 1.
SonicTH-SatAM Revised Bible 1993-03-10 Page 2.jpg|Page 2.
SonicTH-SatAM Revised Bible 1993-03-10 Page 3.jpg|Page 3.
SonicTH-SatAM Revised Bible 1993-03-10 Page 4.jpg|Page 4.
SonicTH-SatAM Revised Bible 1993-03-10 Page 5.jpg|Page 5.
SonicTH-SatAM Revised Bible 1993-03-10 Page 6.jpg|Page 6.
SonicTH-SatAM Revised Bible 1993-03-10 Page 7.jpg|Page 7.
SonicTH-SatAM Revised Bible 1993-03-10 Page 8.jpg|Page 8.
SonicTH-SatAM Revised Bible 1993-03-10 Page 9.jpg|Page 9.
SonicTH-SatAM Revised Bible 1993-03-10 Page 10.jpg|Page 10.
SonicTH-SatAM Revised Bible 1993-03-10 Page 11.jpg|Page 11.
</gallery>

==Original opening==

When putting together the pilot episode "Heads or Tails," an intro using the designs from the pilot was also animated. By the time the episode finally aired on ABC, this original intro had been removed, replaced by the more familiar opening that would be seen in the rest of the series. While never released to the public, this original intro was completed, and featured at the Sega booth at [[sega:Summer CES 1993|Summer CES 1993]].{{ref|http://ghostarchive.org/varchive/sIsYIp3wknY|2=https://youtube.com/watch?v=sIsYIp3wknY?t=180}} The storyboards for the original opening were included in the ''[[Sonic_the_Hedgehog_(TV_series)/Home_releases#DVD_6|Sonic the Hedgehog The Complete Series]]'' DVD boxset by Shout Factory.{{ref|http://ghostarchive.org/varchive/4W-wKw6sPlA|2=https://www.youtube.com/watch?v=4W-wKw6sPlA}}

<gallery>
SonicTH-SatAM Production Cell Original Intro 6 Full.jpg|Sonic rushing past his logo.{{ref|1=https://web.archive.org/web/20221219081706/https://comics.ha.com/itm/animation-art/production-cel/sonic-the-hedgehog-title-card-production-cel-setup-dic-c-1993-94-/a/122115-14010.s}}
SonicTH-SatAM Production Cell Original Intro Two Frames.jpg|Engaging with the logo.{{ref|1=https://web.archive.org/web/20221213060826/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-title-card-production-cel-setup-and-animation-drawing-group-of-6-dic-c-1993-94-total-3-/a/7254-17212.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro Three Frames Lineart.jpg|Line art.{{ref|1=https://web.archive.org/web/20221213060826/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-title-card-production-cel-setup-and-animation-drawing-group-of-6-dic-c-1993-94-total-3-/a/7254-17212.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 2.jpg|Robotnik diving in.
SonicTH-SatAM Production Cell Original Intro 9-a.jpg|Full animation cell.{{ref|https://web.archive.org/web/20201127193239/https://twitter.com/max6464646464/status/1332403173504454657}}
SonicTH-SatAM Production Cell Original Intro 9-b.jpg|Painted Robotnik.{{ref|https://web.archive.org/web/20201127193239/https://twitter.com/max6464646464/status/1332403173504454657}}
SonicTH-SatAM Production Cell Original Intro 9-c.jpg|Line art.{{ref|https://web.archive.org/web/20201127193239/https://twitter.com/max6464646464/status/1332403173504454657}}
SonicTH-SatAM Production Cell Original Intro 7.jpg|Full animation cell and corresponding line art.{{ref|1=https://web.archive.org/web/20221213065450/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-doctor-robotnik-production-cel-and-animation-drawing-dic-1999-total-2-original-art-/a/322210-47329.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 4 Full.jpg|Sonic taunting SWATbots.{{ref|1=https://web.archive.org/web/20221213061918/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-sonic-and-robots-production-cel-setup-with-production-background-dic-c-1993-94-/a/322217-49324.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 4 Background.jpg|Background only.{{ref|1=https://web.archive.org/web/20221213061918/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-sonic-and-robots-production-cel-setup-with-production-background-dic-c-1993-94-/a/322217-49324.s?ic4=GalleryView-Thumbnail-071515}}
38sonic06.jpg|The original roboticizer, with Bunnie Rabbot.
SonicTH-SatAM Unused Intro Photo.jpg|Pinned against a wall.
SonicTH-SatAM Production Cell Original Intro 1.jpg|Holding a power ring.{{ref|1=https://web.archive.org/web/20160208161409/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=196822}}
SonicTH-SatAM Production Cell Original Intro 1-lineart.jpg|Line art.{{ref|1=https://web.archive.org/web/20160208161409/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=196822}}
SonicTH-SatAM Production Cell Original Intro 5.jpg|Power ring action.
PanonramicSonicCel.jpg|Sonic rescuing his friends.{{ref|1=https://web.archive.org/web/20210301123713/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=171158}}
SonicTH-SatAM Unused Intro Line Art.jpg|Line art.{{ref|1=https://web.archive.org/web/20210301123713/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=171158}}
SonicTH-SatAM Production Cell Original Intro 3.jpg|Sonic and his logo.{{ref|1=https://web.archive.org/web/20221213060826/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-title-card-production-cel-setup-and-animation-drawing-group-of-6-dic-c-1993-94-total-3-/a/7254-17212.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 3 Sonic.jpg|Painted Sonic.{{ref|1=https://web.archive.org/web/20221213060826/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-title-card-production-cel-setup-and-animation-drawing-group-of-6-dic-c-1993-94-total-3-/a/7254-17212.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 3 Lineart.jpg|Line art.{{ref|1=https://web.archive.org/web/20221213060826/https://comics.ha.com/itm/animation-art/sonic-the-hedgehog-title-card-production-cel-setup-and-animation-drawing-group-of-6-dic-c-1993-94-total-3-/a/7254-17212.s?ic4=GalleryView-Thumbnail-071515}}
SonicTH-SatAM Production Cell Original Intro 8.jpg|Final frame of the original opening
</gallery>

==Music==

Before the series went to air, a number of potential theme songs for ''Sonic the Hedgehog'' were composed, each of them rejected by ABC. Sensing he knew what the network was looking for, Robby London wrote a demo and submitted it for approval.{{ref|https://ghostarchive.org/varchive/LLTX7TmU8Xo|2=https://www.youtube.com/watch?v=LLTX7TmU8Xo}} The network accepted it, and after further tweaking, it became the main theme of the show. During the first few episodes of the first season, the song was performed by Doni Flanigan.{{ref|https://web.archive.org/web/20220110043149/https://twitter.com/SatamHistorian/status/1480396363577896968}} Reruns of these episodes would replace Doni's version with the song performed by Noisy Neighbors, which would be the version featured on season two and all home video releases.

The orchestral music of the show was composed by [[Michael Tavera]], who was also responsible for a handful of the unused theme songs meant for ''Sonic''. These demo themes were released on the Internet in 2006, when "Fans United for SatAM" user Cheezmatt got in contact with Tavera, asking if he still had any of the backing tracks for ''Sonic the Hedgehog'' in his personal archives, and if so, would be willing to share them. While most of the music that ended up in the show was located in DIC's archives and thus unavailable, Tavera sent a CD containing what he still personally had.{{ref|https://web.archive.org/web/20110205235158/http://www.saturdaymorningsonic.com/media/soundtrack}}

[[File:Michael Tavera Sonic the Hedgehog Demo Disc.jpg|thumb|A photograph of the CD sent by Michael Tavera]]
{{tracklist|
{{track|Sonic the Hedgehog Orchestral "Main Title" in 48 kHz|time=1:13|credits=Music: Michael Tavera}}
{{track|Sonic the Hedgehog Orchestral "Main Title" in 44 kHz|time=1:15|credits=Music: Michael Tavera}}
{{track|Unused theme song 1|time=1:03|credits=Music: Michael Tavera}}
{{track|Unused theme song 2|time=1:04|credits=Music: Michael Tavera; Vocals: Doni Flanigan}}
{{track|Unused theme song 3|time=1:03|credits=Music: Michael Tavera}}
{{track|Unused theme song 4|time=1:04|credits=Music: Michael Tavera}}
{{track|Unused theme song 4 (alternate)|time=1:03|credits=Music: Michael Tavera}}
{{track|Unused music|time=1:04|credits=Music: Michael Tavera}}
{{track|Music used in ''Captain N: The Game Master''|time=1:02|credits=Music: Michael Tavera}}
{{track|Unused music|time=1:04|credits=Music: Michael Tavera}}
{{track|[[Robotropolis]] music|time=1:00|credits=Music: Michael Tavera}}
{{track|''[[Sonic the Hedgehog 2 (16-bit)|Sonic the Hedgehog 2]]'' intro and [[Emerald Hill Zone]] theme|time=0:55|credits=Music: Michael Tavera}}
}}

==Season 3==
{{Main|{{PAGENAME}}/Ben Hurst's Ideas}}
After wrapping up season two, it wasn't long before Ben Hurst began outlining the third season of Sonic the Hedgehog. Before any scripts were written, word came that the series had been canceled. The first hint of what season three was originally meant to entail came in the form of an e-mail, when fan Alessandro Sanasi tracked down Ben's e-mail address and asked him about the cliffhanger.

{{quote|1=The red eyes you saw were [[Ixis Naugus|NAGUS]], the sorcerer trapped in the Void...At the moment the Doomsday machine was destroyed, [Nagus] was able to exploit the energies and pull Robotnik into the Void. Snively takes over...Robotropolis...during the first two episodes, he battles the Freedom Fighters. Without Robotnik's cunning, however, he finds himself on the brink of losing everything. Meanwhile, Nagus is having a delightful time 'torturing' Robotnik while plotting his...escape. He's... discovered the magic which will enable him to leave the Void without turning to crystal...But...Robotnik has found a means to communicate with Snively--telling the little guy his location. Snively...tells Robotnik where he can get off.

But then, as the Freedom Fighters are on the brink of taking over Robotropolis, Snively opens the Void, releasing Robotnik-- and accidentally releasing Nagus and Sally's father.... Now Nagus is in charge, Robotnik is his "Snively", and Snively becomes a nobody. Nagus uses the King to bait a trap to catch Sally. Robotnik plots to regain his power and Snively defects to the Freedom Fighters.|2=Ben Hurst, writer and associate story editor of ''Sonic the Hedgehog{{ref|https://web.archive.org/web/20221004230742/https://www.andrews.edu/~drazen/sonfaqs.htm}}}}

After Ben Hurst's death in 2010, a series of e-mails written by him were released to the public. Composed during 2003 and 2004, they served as the beginnings of an outline for a potential ''Sonic the Hedgehog'' movie, following up on the cliffhanger of season two.{{ref|https://web.archive.org/web/20110206021523/http://www.saturdaymorningsonic.com/features/bens_notes}} The film would have started with the Freedom Fighters, now called the Freedom Builders, working on restoring Robotropolis to its former glory. Unbeknownst to the group, their movements in the city would be watched by Snively, and as the film progressed, would prove to be a formidable opponent, in some ways better at strategy than Dr. Robotnik.

The role of [[NICOLE]], Sally's handheld computer, would have been one of the focal points in the story. The plan was to reveal that, prior to the events of "Blast to the Past," Sally was friends with a young girl named Nicole. A child genius, she caught the attention of Dr. Robotnik, who lured her into his lab so he could transform her mind into a sophisticated artificial intelligence. Thinking he has her under his control, he is unaware of her complete sentience, which has also given her the ability to control minds. Running through a number of scenarios, she decides the only thing she can do is make Robotnik forget she exists, while also wiping her own memories as to prevent her from abusing her newfound powers. Her final act before removing her free will was to make sure she would end up in the hands of her friend, Princess Sally.

This backstory would have been revealed to Sonic during the film, as he and NICOLE spent more time one on one. Asking her a variety of questions to try and understand how she works, he realizes there is more to her than meets the eye when she stumbles across her words, going silent for a moment. Coming back online, Sonic asks what she was doing, but NICOLE is unable to recall, having already erased from her memory the fact she prevented Snively from turning on a second NICOLE unit that Robotnik had among his personal belongings.{{intref|Sonic the Hedgehog (TV series)/Development/Ben Hurst's Ideas}}

A handful of other threads were known to be part of Ben Hurst's conceptual season three. Among these details would have been the further exploration of Dulcy the Dragon's abilities and character growth for Miles "Tails" Prower.{{ref|https://web.archive.org/web/20220822151235/https://www.sonicsatam.com/information/ben-hurst-memorial-and-tribute/}} The framework for a love triangle between Sonic, Sally, and a new character was also toyed with, though no details regarding the new character were ever made public. Hurst also hinted that "big plans" were in store for Antoine.{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}} While he never went on record stating what those plans were, Sonique, former webmaster of "Fans United for SatAM," recalled in a conversation she had with Hurst that "when Snively turned to the Freedom Fighters, he'd eventually try to betray them, and Antoine would be the one to figure it out. But of course he wouldn't figure it out right away, he'd be sitting right on the piece of evidence that would reveal it, but of course it being Antoine would take him a while to catch on."{{ref|https://web.archive.org/web/20220316215750/http://www.saturdaymorningsonic.com/features/bens_notes/}}

One detail Ben Hurst never made public was how the story of Sonic and the Freedom Fighters were meant to end. In the remote chance that the series would continue in some form or fashion, he did not want to spoil the story for the fans.{{intref|Ben Hurst interview at SAGExpo (July 3, 2005)}}

==Concept art==
===Characters===
====Sonic the Hedgehog====
<gallery>
SonicTH-SatAM Concept Art Sonic the Hedgehog 1.jpg|Sonic with velcro shoes.
SonicTH-SatAM Concept Art Sonic the Hedgehog 2.jpg|Pointing and sitting.
SonicTH-SatAM Concept Art Sonic the Hedgehog 3.jpg|Charging up.
SonicTH-SatAM Concept Art Sonic the Hedgehog 4.jpg|Dashing off.
SonicTH-SatAM Concept Art Sonic Power Ring 1.png|Sonic with a power ring.
SonicTH-SatAM Concept Art Sonic Power Ring 2.png|Charging up.
SonicTH-SatAM Concept Art Sonic Power Ring 3.png|Continued.
SonicTH-SatAM Concept Art Sonic Power Ring 4.png|Continued.
SonicTH-SatAM Concept Art Sonic Power Ring 5.png|Running off.
SonicTH-SatAM Concept Art Sonic Power Ring 6.png|Continued.
SonicTH-SatAM Concept Art Sonic the Hedgehog Spinning.JPG|Spinning and running.
SonicTH-SatAM Concept Art Sonic the Hedgehog Spinning Zoom.jpg|Close-up of spinning.
SonicTH-SatAM Concept Art SonicRunning.jpg|Line art of Sonic running, with flame trail.{{ref|1=https://web.archive.org/web/20210225103240/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383968}}
SonicTH-SatAM Concept Art Sonic Action Poses.jpg|Sonic runing poses.
SonicTH-SatAM Concept Art Sonic Poses 2.jpg|Various poses.
SonicTH-SatAM Concept Art Sonic Poses 3.jpg|Various poses.
SonicTH-SatAM Concept Art Sonic Poses 4.jpg|Various poses.
SonicTH-SatAM Concept Art Sonic G Force Face.jpg|G-force face.
SonicTH-SatAM Sketch SonicRunning2.jpg|Sonic running.
</gallery>

====Princess Sally Acorn====
<gallery>
SatAM Sally Concept.jpg|A human Princess Sally.
SonicTH-SatAM Concept Art Sally 8.jpg|A different human Princess Sally.
SonicTH-SatAM Concept Art Sally 2-a.jpg|"Bubbling spring" hair, and "leaf elbow gloves."
SonicTH-SatAM Concept Art Sally 2-b.jpg|Close-up.
SonicTH-SatAM Concept Art Sally 3.JPG|A slightly different drawing of the same concept.
SonicTH-SatAM Concept Art Sally 4.JPG|"Baseball hat" hair, and a cape.
SonicTH-SatAM Concept Art Sally 5.jpg|"Sassy."
SonicTH-SatAM Concept Art Sally 4 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Sally 6a.jpg|Another human Sally.
SonicTH-SatAM Concept Art Sally 7.jpg|Close-up.
SonicTH-SatAM Concept Art Sally 6.JPG|One more version of human Sally, with "her own Sonic sneaks."
SatAM Sally Concept 2.jpg|Wearing harem pants.{{ref|1=https://web.archive.org/web/20221224111411/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383963}}
SonicTH-SatAM Concept Art Sally 10.jpg|Sketches and drawings of a design far closer to how Sally would look in the pilot.
SonicTH-SatAM Concept Art Sally 11.jpg|Bits and pieces.
SonicTH-SatAM Concept Art Sally 15.JPG
SonicTH-SatAM Concept Art Sally 12.jpg|Confidently posed.{{ref|1=https://web.archive.org/web/20210225102518/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=392817}}
SonicTH-SatAM Concept Art Sally 13.jpg|Reverse.{{ref|1=https://web.archive.org/web/20210225110338/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=392816}}
SonicTH-SatAM Concept Art Sally 14.jpg|Two expressions.{{ref|1=https://web.archive.org/web/20210225100346/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=392815}}
SonicTH-SatAM Concept Art Sally 16.jpg
SonicTH-SatAM Sketch SallyWalking.jpg|A sketch of Sally walking.
SonicTH-SatAM Sketch SallyWalking-2.jpg|Another sketch.{{ref|1=https://web.archive.org/web/20210225105237/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383965}}
</gallery>

====Rotor Walrus====
<gallery>
SonicTH-SatAM Concept Art Rotor 1.jpg|"Boomer the Sea Lion."
SonicTH-SatAM Concept Art Rotor Bunnie Tails.jpg|An early Rotor, along with concept art of Bunnie and Tails.
SonicTH-SatAM Sketch Rotor 1.jpg|Various sketches of Rotor.{{ref|1=https://web.archive.org/web/20221222105234/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383960}}
SonicTH-SatAM Sketch Rotor 2.jpg|Sketches of various poses.
SatAM Rotor Concept.jpg|Cleaned up version of the bottom half.
SonicTH-SatAM Sketch Rotor 3.jpg|Sketches of various poses.
SonicTH-SatAM Concept Art Antoine Rotor.jpg|Pilot Rotor, along with a not-final Antoine.
SonicTH-SatAM Sketch RotorWalking1.jpg|Rotor walking.
SonicTH-SatAM Sketch RotorWalking2.jpg|Rotor walking.
SonicTH-SatAM Concept Art Rotor-Season2.jpg|Season two redesign.{{ref|1=https://web.archive.org/web/20221222105222/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383961}}
</gallery>

====Bunnie Rabbot====
<gallery>
SonicTH-SatAM Concept Art Bunnie Rabbot 1.jpg|"Ruff Studies" of Bunnie.
SonicTH-SatAM Concept Art Bunnie Rabbot 2-a.jpg|"Bunny Rabbot," roboticized from the neck down.
SatAM Bunnie Concept.jpg|Close-up.
SonicTH-SatAM Concept Art Bunnie Rabbot 3.JPG|Exploring how her arms and shoulders would work.
SonicTH-SatAM Concept Art Bunnie Rabbot 4.jpg|Lurching forward.
SonicTH-SatAM Concept Art Bunnie Rabbot 5.jpg|An awkward stance.
SonicTH-SatAM Concept Art Bunnie Rabbot 6b.JPG|A design with non-roboticized arm.
SonicTH-SatAM Concept Art Bunnie Rabbot 6c.jpg|Close-up.
SonicTH-SatAM Concept Art Bunnie Rabbot 6.jpg|Further close-up of the left two images.
SonicTH-SatAM Concept Art Bunnie Rabbot 7-a.jpg|"Sexy? Cuter."
SonicTH-SatAM Concept Art Bunnie Rabbot 7-b.jpg|Close-up.
SonicTH-SatAM Concept Art Bunnie Rabbot 8-a.jpg|Closer to her final design, with torso still robotic.
SonicTH-SatAM Concept Art Bunnie Rabbot 8-c.jpg|Close-up.
SonicTH-SatAM Concept Art Bunnie Rabbot 8-b.png|Alternate scan, with artist signature.
SonicTH-SatAM Concept Art Bunnie Rabbot 9.jpg|Back of Bunnie.
SonicTH-SatAM Concept Art Bunnie Rabbot 10.jpg|Additional pose.
SonicTH-SatAM Concept Art Bunnie Rabbot 11.JPG|"This expression works with new head/body."
SonicTH-SatAM Concept Art Bunnie Rabbot 12.JPG|Metal claw.
SonicTH-SatAM Concept Art Bunnie Rabbot 12 Zoom.jpg|Close-up.
</gallery>

====Antoine Depardieu====
<gallery>
SonicTH-SatAM Concept Art Antoine 1.jpg|Human version of Antoine.
SonicTH-SatAM Concept Art Antoine 2.jpg|Buff Antoine.
SonicTH-SatAM Concept Art Antoine 3.jpg|More buff Antoine.
SonicTH-SatAM Concept Art Antoine 4.jpg|Near final Antoine, different hairstyle.
SonicTH-SatAM Concept Art Antoine 5.jpg Different pose.{{ref|1=https://web.archive.org/web/20210225102702/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=384089}}
</gallery>

====Miles "Tails" Prower====
<gallery>
SonicTH-SatAM Concept Art Tails 1.jpg|Awkward standing, "like a kid."
SonicTH-SatAM Concept Art Tails 3.jpg|Wearing an oversized hat.
SonicTH-SatAM Concept Art Tails 2.jpg|Exploring his walk.
SonicTH-SatAM Concept Art Tails 4.jpg|Getting ready to fly.{{ref|1=https://web.archive.org/web/20210228161435/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=384088}}
SonicTH-SatAM Concept Art Tails Flying.jpg|Tails flying "not very far (or well)."{{ref|https://web.archive.org/web/20221213042410/https://twitter.com/Analytic_Art/status/1087495261239205888}}
SonicTH-SatAM Concept Art Tails Motion Sickness.jpg|Motion sickness.
SonicTH-SatAM Sketch TailsWalking.jpg|Sketch of Tails walking.
SonicTH-SatAM Line Art Tails Goggles 1.jpg|Pencil art of Tails wearing flight goggles.
</gallery>

====Muttski====
<gallery>
SonicTH-SatAM Concept Art Muttski 3.jpg|An early design of Muttski.
SonicTH-SatAM Concept Art Muttski 1.jpg|Another early Muttski. In lieu of front legs, he uses his ears.
SonicTH-SatAM Concept Art Muttski 2 Full.JPG|Has a cat tail.
SonicTH-SatAM Concept Art Muttski 2.jpg||Close-up.
SonicTH-SatAM Concept Art Muttski 6.JPG|"Runs in place - slowly."
SonicTH-SatAM Concept Art Muttski 6 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Muttski 4.jpg|Sketches.
SonicTH-SatAM Concept Art Muttski 5.jpg|Muttski concept. Next to Sonic for scale.
SonicTH-SatAM Concept Art Muttski Villagers.jpg|Muttski along with sketches of unnamed Freedom Fighters.
</gallery>

====Dr. Ivo Robotnik====
<gallery>
SonicTH-SatAM Concept Art Robotnik 1 Sketch.jpg|Early Robotnik sketch.
SatAM Robotnik Concept 2.jpg|Dr. Robotnic [''sic'']
SonicTH-SatAM Concept Art Robotnik 2 Alt.jpg|Alternate color scheme. 
SatAM Robotnik Concept.jpg|"Electric pony tail." Holding Cluck.
SonicTH-SatAM Concept Art Robotnik 12.JPG|"Maybe he's just floating in there."
SonicTH-SatAM Concept Art Robotnik 12 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Robotnik 3.JPG|Wiry hair, pig nose.
SonicTH-SatAM Concept Art Robotnik 4.JPG|Robotic Dr.
SonicTH-SatAM Concept Art Robotnik 5.JPG|Another concept with Cluck.
SonicTH-SatAM Concept Art Robotnik 6.jpg|A riding-inspired Robotnik.
SonicTH-SatAM Concept Art Robotnik 7.JPG|Robotnik and lethal-tailed Cluck.
SonicTH-SatAM Concept Art Robotnik 7 Zoom.jpg|Close-up, with "basic egg."
SonicTH-SatAM Concept Art Robotnik 8.jpg|Humanoid Robotnik, with "Toady."
SonicTH-SatAM Concept Art Robotnik 9a.JPG|Retractable Cluck neck.
SonicTH-SatAM Concept Art Robotnik 9.jpg|Close-up.
SonicTH-SatAM Concept Art Robotnik 10a.JPG|Another angle.
SonicTH-SatAM Concept Art Robotnik 10.jpg|Close-up.
SonicTH-SatAM Concept Art Robotnik 11.jpg|A design closer to the final ABC version.
SonicTH-SatAM Line Art Robotnik Pencil Outline.jpg|An outline of the final ABC version.
</gallery>

====Snively, SWATbots, and Cluck====
<gallery>
SonicTH-SatAM Concept Art Snively 1.jpg|"Toady Robotic."
SonicTH-SatAM Concept Art Snively 2.jpg|Snively with hair.
SonicTH-SatAM Concept Art Snively 3.jpg|Various expressions.
SonicTH-SatAM Concept Art Snively 6.jpg|Many heads.
SonicTH-SatAM Concept Art Snively 7.jpg|A pair of Snively's.
SonicTH-SatAM Concept Art Snively 4.jpg|Two outfits.
SonicTH-SatAM Concept Art Snively 5.jpg|Outfit exploration, and ears.
SonicTH-SatAM Concept Art SWATBots.jpg|SWATbots and arm exploration.
SonicTH-SatAM Concept Art SWATBots Fire.jpg|SWATbot firing.
SonicTH-SatAM Concept Art SWATBots Cluck.jpg|A SWATbot and Cluck.
SonicTH-SatAM Concept Art Snively SWATbots 1.jpg|An early Snively with SWATbots.
SonicTH-SatAM Concept Art Snively SWATbots 2.jpg|Robotnik's minions.
SonicTH-SatAM Concept Art Snively SWATbots 3.jpg|Robotnik's minions.
SonicTH-SatAM Concept Art Snively SWATbots 4.jpg|Various, plus an eye with bat wings.
SonicTH-SatAM Concept Art Snively SWATbots 5.jpg|Scratching his temple. 
SatAM Cluck Concept.jpg|Robotnic's Chicken [''sic'']
SonicTH-SatAM Concept Art Cluck 2.jpg|Alternate concept art of Cluck.
</gallery>

====Other====
<gallery>
SonicTH-SatAM Concept Art AnimalVillagers 1.jpg|Sketchs of various background characters.
SonicTH-SatAM Concept Art AnimalVillagers 2.jpg|Further refined drawings.{{ref|1=https://web.archive.org/web/20151013145312/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383958}}
SonicTH-SatAM Concept Art AnimalVillagers 3.jpg|Finalized concepts.
SonicTH-SatAM Concept Art AnimalVillagers 4.jpg|Finalized concepts.
SonicTH-SatAM Concept Art AnimalVillagers 5.jpg|Finalized concepts.
SonicTH-SatAM Concept Art Nate Morgan 2.jpg|Nate Morgan, an "old wizard."
SonicTH-SatAM Concept Art Nate Morgan 2 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Nate Morgan 3.jpg|Alternate concept of Nate Morgan.
SonicTH-SatAM Stock Art Dulcy No Pouch.jpg|Dulcy next to Sonic, sans pouch.
SonicTH-SatAM Concept Art Young Dulcy.jpg|Line art of Young Dulcy.{{ref|1=https://web.archive.org/web/20221224041739/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383949}}
</gallery>

===Backgrounds and settings===
<gallery>
SonicTH-SatAM Concept Art Robotropolis.jpg|An early drawing of Robotropolis, with giant robot bat.
SonicTH-SatAM Concept Art Power Ring Grotto.jpg|Sonic at the power ring grotto, with unused Freedom Fighter designs.
SonicTH-SatAM Concept Art Freedom Fighter Battle.jpg|A battle featuring an early Bunnie Rabbot and a human Princess Sally.
SonicTH-SatAM Concept Art Mobius Map.jpg|A map of Mobius, showing the relative positions of Knothole and Robotropolis.{{ref|https://web.archive.org/web/20221221042848/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2007178933}}
SonicTH-SatAM Concept Art Mobius Map Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221221042848/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2007178933}}
SonicTH-SatAM Concept Art Mobius Map 35.jpg|A detailed map of the Great Forest.{{ref|https://web.archive.org/web/20221221041408/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006537710}}
SonicTH-SatAM Concept Art Mobius Map 35 Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221221041408/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006537710}}
SonicTH-SatAM Concept Art Meadow Great Forest.jpg|Great Forest meadow.{{ref|https://web.archive.org/web/20221221025804/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536464}}
SonicTH-SatAM Concept Art Meadow Great Forest Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221221025804/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536464}}
SonicTH-SatAM Concept Art Edge of Meadow Knothole.jpg|Edge of meadow in Knothole.{{ref|https://web.archive.org/web/20221220094807/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536477}}
SonicTH-SatAM Concept Art Edge of Meadow Knothole Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221220094807/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536477}}
SonicTH-SatAM Concept Art Edge of Meadow.jpg|Edge of meadow.{{ref|https://web.archive.org/web/20221221015126/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2007178930}}
SonicTH-SatAM Concept Art Great Forest Trail.jpg|Great Forest trail.{{ref|https://web.archive.org/web/20221221015948/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536451}}
SonicTH-SatAM Concept Art Great Forest Trail Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221221015948/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006536451}}
SonicTH-SatAM Concept Art Knothole Spring.jpg|Knothole spring.{{ref|https://web.archive.org/web/20221221024708/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006537773}}
SonicTH-SatAM Concept Art Knothole Spring Zoom.jpg|Close-up.{{ref|https://web.archive.org/web/20221221024708/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2006537773}}
SonicTH-SatAM Concept Art Village Great Desert.jpg|Ext. Village/Great Desert w/Mobotropolis.{{ref|https://web.archive.org/web/20221224041114/https://www.worthpoint.com/worthopedia/sonic-hedgehog-production-hand-drawn-2005168439}}
SonicTH-SatAm Background Concept 1.jpg|A house in Knothole.
SonicTH-SatAm Background Concept 2.jpg|Knothole village.
SonicTH-SatAm Background Concept 3.jpg|Concept for the Knothole slide entrance.
SonicTH-SatAm Background Concept Knothole Slide.jpg|An alternate slide concept.
SonicTH-SatAm Background Concept Knothole Slide Zoom.jpg|Close-up.
SonicTH-SatAm Background Concept Knothole Slide Note.jpg|Note on the concept. "Frontal catch."
SonicTH-SatAm Background Concept 4.jpg|Knothole.
SonicTH-SatAm Background Concept 4 Zoom.jpg|Close-up.
SonicTH-SatAm Background Concept 5 Full.JPG|Another view of Knothole.
SonicTH-SatAm Background Concept 5.jpg|Close-up.
SonicTH-SatAm Background Concept 5-a.jpg|Another close-up.
SonicTH-SatAm Background Concept 5 Note.jpg|Notes on the concept.
SonicTH-SatAm Background Concept Knothole Elevator Full.jpg|Elevator in Knothole.
SonicTH-SatAm Background Concept Knothole Elevator.jpg|Close-up.
SonicTH-SatAm Background Concept Knothole Elevator Note.jpg|A note - "rough start."
SonicTH-SatAM Concept Art Background Knothole Door 1.JPG|Knothole household door.
SonicTH-SatAM Concept Art Background Knothole Door 1 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Background Knothole Door 1 Note.jpg|Note on the door.
SonicTH-SatAM Concept Art Background Knothole Door 2.JPG|Open door.
SonicTH-SatAM Concept Art Background Knothole Door 2 Zoom.jpg|Close-up.
SonicTH-SatAM Concept Art Background Knothole Door 2 Note.jpg|Note - "Open with vine curtain."
</gallery>

==Production art==
===Character model sheets and stock art===
====Sonic the Hedgehog====
<gallery>
SonicTH-SatAM Concept Art Sonic Turns Wireframe.jpg|Construction forms of Sonic.
SonicTH-SatAM Model Sheet Sonic Turns.png|"Turns" model sheet. Created for the [[Heads or Tails|pilot]].
SonicTH-SatAM Model Sheet Sonic Turns Color.jpg|"Turns" model sheet with first pose colored.
SonicTH-SatAM Model Sheet Sonic Turns Color Zoom.png|Close-up of colored pose.
SonicTH-SatAm Model Sheet Sonic G-Force Face.jpg|Sonic's "G-Force" expression.{{ref|https://web.archive.org/web/20221211095805/https://www.facebook.com/PopKingInc/posts/sonic-the-hedgehog-concept-art-is-for-sale-now-on-ebay-through-our-daughter-comp/509493309183842/}}
SonicTH-SatAM Model Sheet Sonic Golden Glow Line Art.png|A golden-hued Sonic, sans gold.
SatAM Gold Sonic Concept.jpg|A golden-hued Sonic.
SonicTH-SatAM Model Sheet Sonic 34view.png|Three-quarter view of Sonic the Hedgehog. Model sheet for the ongoing series.
SonicTH-SatAM Model Sheet Sonic 34view Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Sonic 34view Color.jpg|Painted cel.
SonicTH-SatAM Model Sheet Sonic 34view Color Zoom.jpg|Close-up of painted cel.
{{ref|https://web.archive.org/web/20221211095805/https://www.facebook.com/PopKingInc/posts/sonic-the-hedgehog-concept-art-is-for-sale-now-on-ebay-through-our-daughter-comp/509493309183842/}}
SonicTH-SatAM Model Sheet Sonic Cloak Lineart.jpg|Sonic in hooded cloak. From "[[Sonic Racer]]."
SonicTH-SatAM Model Sheet Sonic Cloak.jpg|Color version. 
SonicTH-SatAM Model Sheet Sonic Metal Ball.jpg|Sonic caught in a transparent ball. From "[[Game Guy]]."
SonicTH-SatAM Model Sheet Young Sonic.jpg|Young Sonic. From "Blast to the Past" Parts [[Blast to the Past (Part 1)|1]] and [[Blast to the Past (Part 2)|2]].
SonicTH-SatAM Model Sheet Young Sonic Zoom.jpg|Close-up of Young Sonic.
SonicTH-SatAM Stock Art Young Sonic Sally.jpg|Stock art of Young Sonic and Sally.
SonicTH-SatAM Model Sheet Sonic Mega-muck.jpg|Sonic trapped in mega-muck. From "[[Dulcy (episode)|Dulcy]]"
SonicTH-SatAM Model Sheet Sonic Winter.jpg|Sonic wearing a parka, color guide. From [[The Odd Couple/Ro-Becca|The Odd Couple]].
SonicTH-SatAM Model Sheet Sonic with Parka Color.png|In color.
SonicTH-SatAM Model Sheet Sonic Crystal.jpg|Sonic's body turning into crystal. From "[[The Void]]."
SonicTH-SatAM Model Sheet Sonic Crystal Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Sonic Hat.jpg|Sonic in a chef's hat. From [[The Odd Couple/Ro-Becca|The Odd Couple]].
SonicTH-SatAM Model Sheet Sonic Hat Color.jpg|Color version.
SonicTH-SatAM Model Sheet Sonic Wearing Socks.jpg|Sonic wearing socks. From [[The Odd Couple/Ro-Becca|The Odd Couple]].
SonicTH-SatAM Model Sheet Sonic Wearing Socks Color.jpg|Color version.
SonicTH-SatAM Model Sheet Sonic Smoke.jpg|Sonic with a smoldering butt. From "[[Cry of the Wolf]]."
SonicTH-SatAM Model Sheet Sonic Smoke Color.jpg|Color version.
SonicTH-SatAM Model Sheet 238-313 Doomsday Project Sonic.jpg|Sonic with singed spikes. From "[[The Doomsday Project]]."
SonicTH-SatAM Model Sheet 238-313 Doomsday Project Sonic Color Guide.JPG|Color guide.
SonicTH-SatAM Model Sheet Sonic Spike Smoke.jpg|Color version.
SonicTH-SatAM Model Sheet Sonic Deep Power Stones.png|Sonic using the [[Deep Power Stones]]. From "The Doomsday Project."
Sonic Underground Model Sheet Sonic Mouthcharts.jpg|A variety of Sonic's facial expressions. Model sheet repurposed for ''Sonic Underground''.

</gallery>

====Princess Sally Acorn====
<gallery>
SonicTH-SatAM Line Art Sally Pilot Design Wireframe.jpg|Construction turns of Sally's pilot design.
SonicTH-SatAM Line Art Sally Pilot Design.jpg|"Turns" model sheets.
SonicTH-SatAM Stock Art Sally Early Design.jpg|Stock art of Sally's pilot design.{{ref|1=https://web.archive.org/web/20210225113908/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383964}}
SonicTH-SatAM Model Sheet Sally Original Colors.jpg|Sally's original color scheme. It was used in [[Sonic the Hedgehog 0 (Archie Mini-Series)|issue 0]] of the ''[[Sonic the Hedgehog (Archie comics)|Sonic the Hedgehog]]'' mini-series by [[sega:Archie Comics|Archie Comics]].{{ref|1=https://web.archive.org/web/20210225113908/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383964}}
SonicTH-SatAM Line Art Sally Various Poses.jpg|Various stock poses of early Princess Sally.
SonicTH-SatAM Model Sheet Sally Season 1.jpg|"Turn around" model sheet for season one.
SonicTH-SatAM Model Sheet Sally Season 1 Color Guide.jpg|Color guide. {{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Sally Season 1 Side VIew.png|Side view of Princess Sally.
SonicTH-SatAM Model Sheet Sally 34view.png|Three-quarter view of Princess Sally for season one.
SonicTH-SatAM Model Sheet Sally 34view Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Sally 34view Color.jpg|In color. {{ref|1=https://web.archive.org/web/20210301124954/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=429015}}
SonicTH-SatAM Model Sheet Sally Turn Around Season 2.jpg|"Turn around" model sheet for season two. 
SonicTH-SatAM Stock Art Sally Season 2.jpg|Line art of Sally, season two.{{ref|1=https://web.archive.org/web/20210225111255/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=429014}}
SonicTH-SatAM Model Sheet Sally Front View Season 2.jpg|Three-quarter view of Princess Sally for season two. {{ref|1=https://web.archive.org/web/20210225111255/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=429014}}
SonicTH-SatAM Model Sheet Young Sally.jpg|Young Sally. From "Blast to the Past" Parts 1 and 2.
SonicTH-SatAM Model Sheet Young Sally Zoom.jpg|Close-up of Young Sally.
SonicTH-SatAM Model Sheet Sally Nightgown.jpg|Wearing a nightgown, color guide. From "Dulcy."
SonicTH-SatAM Model Sheet Sally Nightgown Color.jpg|In color. 
SonicTH-SatAM Model Sheet Sally Crystal.jpg|Color guide to Sally being encased in crystal. From "The Void."
SonicTH-SatAM Model Sheet Sally Bathrobe.jpg|Wearing a bathrobe, color guide. From "The Odd Couple."
SonicTH-SatAM Model Sheet Sally Bathrobe Color.jpg|In color.
SonicTH-SatAM Model Sheet Sally Magno Vest Lineart.jpg|Wearing a magnetic vest. From "[[Spyhog]]."
SonicTH-SatAM Model Sheet Sally Magno Vest Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Sally Magno Vest.jpg|In color.
SonicTH-SatAM Model Sheet Sally Deep Power Stones.png|Princess Sally using the Deep Power Stones. From "The Doomsday Project."
</gallery>

====Rotor Walrus====
<gallery>
SonicTH-SatAM Line Art Rotor Wireframe 1.jpg|Rotor construction, pilot version.
SonicTH-SatAM Line Art Rotor Wireframe 2.jpg|Part 2.
SonicTH-SatAM Model Sheet Rotor Turns Color.jpg|"Turns" model sheet of Rotor. Created for the pilot.{{ref|1=https://web.archive.org/web/20221229075036/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383947}}
SonicTH-SatAM Stock Art Rotor Poses.jpg|Stock art of Rotor in various poses.{{intref|Sonic Legacy Series Book 1|italics=yes}}
SonicTH-SatAM Model Sheet Rotor Turn Around Season 1.png|"Turn Around" sheet of Rotor, season one.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Rotor Turn Around Season 1 Alt Image.jpg|Alternate image of model sheet.
SonicTH-SatAM Model Sheet Rotor Season 1 Color Day Zoom.png|Season 1 Rotor in "Heads or Tails" pose with color scheme closer to the final show.
SonicTH-SatAM Model Sheet Rotor Season 1 Color Guide.jpg|Three-quarter view of Rotor, season one, color guide.
Rotor34View SatAM ModelSheet.jpg|Three-quarter view of Rotor with alternate color scheme.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Rotor Season 1 Revised.jpg|Season one Rotor with revised color scheme.
SonicTH-SatAM Model Sheet Rotor Season 1 Revised-zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Rotor Turn Around Season 2.jpg|"Turn around" sheet of Rotor, season two.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Rotor 34view Season 2 Light.jpg|Three-quarter view of Rotor, season two, daytime scheme.
SonicTH-SatAM Model Sheet Rotor 34view Season 2 Light Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Rotor 34view Season 2 Dark.jpg|Three-quarter view of Rotor, season two, nighttime scheme.
SonicTH-SatAM Model Sheet Rotor 34view Season 2 Dark Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Rotor Robe.jpg|Wearing a robe. From "The Odd Couple."
SonicTH-SatAM Model Sheet Rotor Robe Color.jpg|In color.
</gallery>

====Bunnie Rabbot====
<gallery>
SonicTH-SatAM Model Sheet Bunnie Wireframe.jpg|Construction sheet of Bunnie for pilot episode.
{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Stock Art Bunnie Poses.jpg|Stock art of various poses.
SonicTH-SatAM Stock Art Bunnie Poses 2.jpg|More stock art.
SonicTH-SatAM Model Sheet Bunnie Wearing Night Cream.jpg|Bunnie wearing night cream (paint only).
SonicTH-SatAM Stock Art Bunnie Night.jpg|Bunnie at night.
Bunnie34View SatAM ModelSheet.jpg|Three-quarter view of Bunnie Rabbot with incorrect leg coloring.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
Bunnie34View SatAM ModelSheet Close-up.png|Close-up of incorrect colors.
SonicTH-SatAM Model Sheet Bunnie Construction.JPG|Revised final construction turn around for season one.
SonicTH-SatAM Model Sheet Bunnie Turn Around.JPG|"Turn around" of Bunnie, season one.
SonicTH-SatAM Model Sheet Bunnie Turn Around Color Guide.png|Color guide.
SonicTH-SatAM Model Sheet Bunnie 34view Color Guide.png|Three-quarter view of Bunnie, color guide.
SonicTH-SatAM Model Sheet Bunnie 34view Corrected.jpg|Three-quarter view of Bunnie with corrected colors.
SonicTH-SatAM Model Sheet Bunnie 34view Corrected Zoom - Copy.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Bunnie Non-R.jpg|Non-roboticized form. From "[[Sonic Conversion]]."
SonicTH-SatAM Model Sheet Young Bunnie Color.jpg|Young Bunnie. From "Blast to the Past" parts 1 and 2.
SonicTH-SatAM Model Sheet Young Bunnie.jpg|Close-up of Young Bunnie.
SonicTH-SatAM Model Sheet Bunnie Encased In Crystal.jpg|Bunnie trapped in crystal, color guide. From "The Void."
SonicTH-SatAM Model Sheet Bunnie Bathrobe Lineart.jpg|Bunnie in bathrobe. From "The Odd Couple."
SonicTH-SatAM Model Sheet Bunnie Bathrobe.jpg|Color guide.
SonicTH-SatAM Model Sheet Bunnie Bathrobe Color.jpg|In color.
</gallery>

====Antoine Depardieu====
<gallery>
SonicTH-SatAM Model Sheet Antoine Pilot Color Guide.jpg|Pilot design turn around color guide.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet 34view Antoine Pilot Zoom.png|Close-up of pilot design, in color.
{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Antoine Turn Around.jpg|"Turn Around" of Antoine, season one.
Antoine34View SatAM ModelSheet.jpg|Three-quarter view of Antoine, season one.
SonicTH-SatAM Model Sheet Antoine 34view Season 2.jpg|Three-quarter view of Antoine, season two, in color.
SonicTH-SatAM Model Sheet Antoine 34view Season 2 Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Antoine SWATBot Nightmare.jpg|Antoine disguised as a SWATbot. From "[[Sonic's Nightmare]]."
SonicTH-SatAM Model Sheet Antoine Robe Crown.jpg|Antoine wearing a "royal robe" and "metal crown." From "[[Fed Up with Antoine/Ghost Busted|Fed Up with Antoine]]."
SonicTH-SatAM Model Sheet Antoine Foot Bandaged.jpg|Wearing a cast. From [[The Odd Couple/Ro-Becca|Ro-Becca]].
SonicTH-SatAM Model Sheet Antoine Foot Bandaged Color.JPG|In color.
SonicTH-SatAM Model Sheet Antoine With Parka.jpg|Wearing a parka. From "The Odd Couple."
SonicTH-SatAM Model Sheet Antoine With Parka Color Guide.JPG|Color guide.
SonicTH-SatAM Model Sheet Antoine With Parka Color.jpg|In color.
SonicTH-SatAM Model Sheet Antoine Mange Vest.jpg|Antoine with a magnetic vest. From "Spyhog."
</gallery>

====Miles "Tails" Prower====
<gallery>
SonicTH-SatAM Model Sheet Tails Turns Color Close-up.png|Close-up of Tails using color scheme from pilot.
SonicTH-SatAM Model Sheet Tails Turns Color.jpg|"Turns" model sheet with corrected colors.{{ref|1=https://web.archive.org/web/20221224041746/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383948}}
SonicTH-SatAM Lineart Tails Construction Turns.jpg|Line art for construction 
SonicTH-SatAM Model Sheet Tails Turns Wireframe.jpg|Construction sheet, for season one.
SonicTH-SatAM Model Sheet Tails Turn Around.jpg|"Turn Around" model sheet for season one.
SonicTH-SatAM Model Sheet Tails Turn Around Color Guide.png|Color Guide.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Tails 34view Day.jpg|Three-quarter view of Miles "Tails" Prower, with "day" color scheme.{{ref|1=https://web.archive.org/web/20210301122643/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=429013}}
SonicTH-SatAm Model Sheet Tails 34view Color Night.jpg|Three-quarter view of Miles "Tails" Prower, with "night" color scheme.
SonicTH-SatAm Model Sheet Tails 34view Color Night Closeup.jpg|Close-up of painted cel.
SonicTH-SatAm Model Sheet Tails Bathrobe.jpg|Wearing a bathrobe. From "The Odd Couple."
SonicTH-SatAM Stock Art Tails Poses.jpg|Various stock art poses.
SonicTH-SatAM Line Art Tails Goggles 2.jpg|Tails wearing goggles.
</gallery>

====Uncle Chuck====
<gallery>
SonicTH-SatAM Model Sheet Uncle Chuck Color.jpg|Uncle Chuck turns, with color. For the pilot.{{ref|1=https://web.archive.org/web/20211125114543/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383946}}
SonicTH-SatAM Model Sheet Young Uncle Chuck.jpg|Young Uncle Chuck. From "Blast to the Past" parts 1 and 2.
SonicTH-SatAM Model Sheet Uncle Chuck Open Chest.jpg|Uncle Chuck with open chest, color guide. From "Spy Hog."
SonicTH-SatAM Model Sheet Uncle Chuck Open Chest Color.jpg|In color.
</gallery>

====Dulcy the Dragon====
<gallery>
Dulcy SatAM ModelSheet.jpg|Three-quarter view of Dulcy, using an earlier color scheme.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet Dulcy Light.jpg|Three-quarter view of Dulcy, with "day" color scheme.
SonicTH-SatAM Model Sheet Dulcy Dark.jpg|Three-quater view of Dulcy, with "night" color scheme
SonicTH-SatAM Model Sheet Dulcy Dark Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Line Art Dulcy Front Construction.jpg|Construction - front.
SonicTH-SatAM Stock Art Dulcy Side Shapes.jpg|Construction - side.
SonicTH-SatAM Line Art Dulcy Back Construction.jpg|Construction - back.
SonicTH-SatAM Line Art Dulcy Construction.jpg|Dulcy construction shapes.
SonicTH-SatAM Stock Art Dulcy Side.jpg|Side model of Dulcy.
SonicTH-SatAM Stock Art Dulcy Side Zoom.jpg|Close-up.
{{ref|1=https://web.archive.org/web/20221224081739/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383953}}
SonicTH-SatAM Stock Art Dulcy Breath 1.jpg|Breath pose 1.
SonicTH-SatAM Stock Art Dulcy Breath 2.jpg|Breath pose 2.
SonicTH-SatAM Stock Art Dulcy Breath 3.jpg|Breath pose 3.
SonicTH-SatAM Stock Art Dulcy Breath 4.jpg|Breath pose 4.
SonicTH-SatAM Line Art Dulcy Fire.jpg|Fire breath.{{ref|1=https://web.archive.org/web/20221224073918/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383951}}
SonicTH-SatAM Line Art Dulcy Ice Breath.jpg|Ice breath.{{ref|1=https://web.archive.org/web/20221224074350/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383952}}
SonicTH-SatAM Stock Art Dulcy Ice Full.jpg|Alternate pose with ice breath.
SonicTH-SatAM Stock Art Dulcy Ice.jpg|Close-up.
SonicTH-SatAM Lineart Dulcy Flight.jpg|Dulcy in flight.
SonicTH-SatAM Stock Art Dulcy Smoke.jpg|Smoke trail.{{ref|1=https://web.archive.org/web/20210225110234/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383950}}
SonicTH-SatAM Stock Art Dulcy Repose.jpg|Dulcy in repose.
</gallery>

====Lupe & the Wolf Pack====
<gallery>
SonicTH-SatAM Model Sheet Lupe.jpg|Lupe, introduced in "[[Cry of the Wolf]]."
SonicTH-SatAM Model Sheet Lupe Color Guide.JPG|Color guide.
SonicTH-SatAM Model Sheet Lupe Color Zoom.png|In color.
SonicTH-SatAM Model Sheet Lupe With Parachute.jpg|Wearing a parachute. From "The Doomsday Project."
SonicTH-SatAM Model Sheet Lupe With Parachute Color.jpg|In color.
SonicTH-SatAM Model Sheet Lupe With Open Parachute Line Art.JPG|With open parachute. From "The Doomsday Project."
SonicTH-SatAM Model Sheet Lupe With Open Parachute.jpg|Color guide.
SonicTH-SatAM Model Sheet Lupe With Open Parachute Color.JPG|In color.
SonicTH-SatAM Model Sheet Wolf3.jpg|Wolf #3.
SonicTH-SatAM Model Sheet Wolf4.jpg|Wolf #4.
</gallery>

====Dr. Ivo Robotnik====
<gallery>
SonicTH-SatAM Model Sheet Robotnik Construction.jpg|"Construction" model sheet of Dr. Robotnik.
SonicTH-SatAM Model Sheet Robotnik Turnaround Cape.jpg|"Turn Around" with cape.
SonicTH-SatAM Model Sheet Robotnik Turn Around Color Guide.png|Color guide.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Stock Art Robotnik Side.jpg|Stock art of side view.{{ref|1=https://web.archive.org/web/20210225103943/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=384086}}
SonicTH-SatAM Model Sheet Robotnik ABC Version.jpg|Three-quarter view of Dr. Robotnik.
SonicTH-SatAM Model Sheet Robotnik ABC Version Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Stock Art Robotnik Expressions.jpg|Stock art of facial expressions.
SonicTH-SatAM Stock Art Robotnik Head.jpg|Two more heads.
SonicTH-SatAM Model Sheet Young Robotnik.jpg|Young Robotnik. From "Blast to the Past" parts 1 and 2.
SonicTH-SatAM Model Sheet Robotnik Pajamas.jpg|Wearing pajamas. From "Dulcy."
SonicTH-SatAM Model Sheet Robotnik Robe.jpg|Wearing a robe. From "Dulcy."
SonicTH-SatAM Model Sheet Robotnik Ice Sculpture Full.png|Robotnik frozen by Dulcy's ice breath. From "Dulcy."
SonicTH-SatAM Model Sheet Robotnik Frozen Model.jpg|Close-up.
SonicTH-SatAM Model Sheet Robotnik Slug Lineart.JPG|Robotnik with a slug head. From "The Void."
SonicTH-SatAM Model Sheet Robotnik Slug.jpg|Color guide.
SonicTH-SatAM Model Sheet Gorilla Robotnik.jpg|Robotnik with a gorilla head. From "The Void."
SonicTH-SatAM Model Sheet The Void Pig Robotnik.jpg|Robotnik with a pig head. From "The Void."{{ref|1=https://web.archive.org/web/20211116094820/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383945}}
SonicTH-SatAM Model Sheet The Void Pig Robotnik Color.jpg|In color.
Sonic Underground Model Sheet Robotnik Stock.jpg|Three-quarter view of Dr. Robotnik. Repurposed for ''Sonic Underground''.
Sonic Underground Model Sheet Robotnik Construction Drawings 2.jpg|Construction drawings 2. Repurposed for ''Sonic Underground''.
Sonic Underground Model Sheet Robotnik Expressions 1.jpg|A number of Robotnik expressions. Repurposed for ''Sonic Underground''.
Sonic Underground Model Sheet Robotnik Expressions 2.jpg|More Robotnik expressions. Repurposed for ''Sonic Underground''.
Sonic Underground Model Sheet Robotnik Mouthcharts.jpg|Dr. Robotnik mouthchart. Repurposed for ''Sonic Underground''.
</gallery>

====Snively, SWATbots, and other robots====
<gallery>
SonicTH-SatAM Line Art Snively Wireframe.jpg|Construction of Snively.
SonicTH-SatAM Model Sheet Snively.jpg|Turn around of Snively.
SonicTH-SatAM Model Sheet Snively 34view Color Pilot Zoom.png|Close-up of Snively using pilot color scheme.
SonicTH-SatAM Model Sheet Snively Color Guide.png|Color guide.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Stock Art Snively Side.jpg|Stock art of side view.{{ref|1=https://web.archive.org/web/20210225110317/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=384090}}
SonicTH-SatAM Model Sheet Snively 34view Color.jpg|Three-quarter view of Snively, colored.
SonicTH-SatAM Model Sheet Snively 34view Color Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Young Snively.jpg|Young Snively. From "Blast to the Past" part 1 and 2.
SonicTH-SatAM Model Sheet Snively In Costume.jpg|Snively in costume. From "The Doomsday Project." 
SonicTH-SatAM Model Sheet Snively In Costume Color.jpg|In color.
SonicTH-SatAM Model Sheet SWATbot Color Guide.png|SWATbot turn around color guide.{{ref|https://web.archive.org/web/20191224050621/http://www.saturdaymorningsonic.com/gallery/production-art/model-sheets/}}
SonicTH-SatAM Model Sheet SWATBot Front View.jpg|Front view of SWATbot.
SonicTH-SatAM Model Sheet SWATBot Front View Zoom.jpg|Close-up of painted cel.
SonicTH-SatAM Model Sheet Cluck Turn Around.JPG|Cluck turn around model sheet.
SonicTH-SatAM Stock Art Buzzbomber Construction.jpg|Construction of a [[buzzbomber]].
SonicTH-SatAM Stock Art Buzzbomber Final.jpg|Final model, front.
SonicTH-SatAM Stock Art Buzzbomber Side.jpg|Side.
SonicTH-SatAM Stock Art Buzzbomber Away.jpg|Facing away.
SonicTH-SatAM Stock Art Buzzbomber Loaded.jpg|Buzzbiomber, fully loaded.
</gallery>

====Other====
<gallery>
SonicTH-SatAM Model Sheet Size Comparison.png|Size comparison chart.
SonicTH-SatAM Model Sheet Freedom Fighters.png|Assorted unnamed Freedom Fighters.
SonicTH-SatAM Model Sheet Scrawny Cat.jpg|Scrawny cat. Briefly seen in the pilot.
SonicTH-SatAM Model Sheet RandomCitizen8.jpg|Random citizen of Mobotropolis. From "Blast to the Past" parts 1 and 2.
SonicTH-SatAM Model Sheet RandomCitizen8 Zoom.jpg|Close-up.
SonicTH-SatAM Model Sheet Hyena Hood 6.jpg|A member of the Nasty Hyenas. From "Fed Up with Antoine."
SonicTH-SatAM Model Sheet Naugus.jpg|Naugus. From "The Void."
SonicTH-SatAM Model Sheet Naugus Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Naugus Color.png|In color.
SonicTH-SatAM Model Sheet Naugus Color Zoom.png|Close-up.
SonicTH-SatAM Model Sheet King Turned to Crystal Waist Color.png|King Acorn turning to crystal. From "The Void."
SonicTH-SatAM Model Sheet Robecca.jpg|Ro-Becca, from her self-titled episode.
SonicTH-SatAM Model Sheet Robecca Color Guide.jpg|Color guide.
SonicTH-SatAM Model Sheet Rhino.png|Rhino. From "Cry of the Wolf."
</gallery>

===Object Model Sheets===
====Heads or Tails====
<gallery>
SonicTH-SatAM Model Sheet 238-010 M01-1 sleekhover.png|Front of sleek hovercraft.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M01-2 sleekhover.png|Three-quarter front.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M01-3 sleekhover.png|Bottom view.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M01 sleekhoverinstruction.png|Multiple views, with instructions on how it works.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M03 cluckseyeball.png|Cluck's eyeball.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M03 redlight.png|A red light.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M04 chairbutton.png|A panel of buttons on Robotnik's chair.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M07 fish.png|A fish for Rotor to eat.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M08-1 boomerspack.png|Rotor wearing a backpack. The sheet still refers to him as Boomer.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M08-2 boomerspack.png|Rotor's backpack.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M10 sonicsbackpack.png|Sonic's backpack.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M11 floatingcamera.png|A floating spy camera.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M12 bighaystack.png|A haystack, which the Freedom Fighters land in.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M13 catapultbrokenarm.png|A broken catapult arm.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M13-1 catapult.png|A catapult.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M13-2 catapult.png|Three-quarter view.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M13-3 catapult.png|Diagram of catapault.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M14 catapultarm.png|A new throwing arm for the catapult.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M16 holocatapult.png|Holographic image of catapult.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M18 powerring.png|Golden power [[ring]].{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M19 boomersbib.png|Rotor's "napkin."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M20-1 patrolvehicle.png|Three-quarter front view of patrol vehicle.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M20-2 patrolvehicle.png |Three-quarter back view.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M20-3 patrolvehicle.png|Rear.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M20 patrolvehicleinstruction.png|Instructional sheet describing how it works.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M21 trashcan.png|Robotropolis dumpster.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M22 exhaustpipe.png|An exhaust pipe.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M23 photochuckmuttski.png|A photo of Uncle Chuck and Muttski.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M24 metalspitnallbullet.png|Metal spitball bullets.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-010 M25 sonicswatch.png|Sonic's watch.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Stock Art Sonic Watch.jpg|Line art of previous model sheet.
</gallery>

====Other====
<gallery>
SonicTH-SatAM Model Sheet Background Robotnik War Room Chair.jpg|Robotnik's war room chair.{{ref|https://web.archive.org/web/20200412222200/https://twitter.com/KenPenders/status/1249462683205681153}}
SonicTH-SatAM Model Sheet Roboticizer Chair.jpg|A chair for a roboticizer. From "[[Sonic and Sally]]"
SonicTH-SatAM Model Sheet 238-204 M02 freedomstormer.png|The Freedom Stormer. From "[[Sonic and the Secret Scrolls]]."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-204 M17 controlbox.png|Snively's control box. From "[[Sonic and the Secret Scrolls]]."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-206 M09 hugecomputer.png|A large computer terminal. From "Sonic Racer."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-206 M31 antennarelay.png|An antenna relay. From "Sonic Racer."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-206 MXX hoverracer.png|A hover racer. From "Sonic Racer."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-207 M02 remotecontrol.png|A curiously shaped remote control device. From "[[Hooked on Sonics]]."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-207 M10 robotnikhover.png|Robotnik's hovercraft. From "Hooked on Sonics."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-207 M12 sonicradar.png|Sonic radar machine. From "Hooked on Sonics."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-207 M13 laserhowitzer.png|Laser howitzer. From "Hooked on Sonics."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet 238-208 M05 telescope.png|Telescope. From "[[Harmonic Sonic]]."{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Model Sheet Sonic Energy Lines Color.jpg|Energy lines. From "The Void."
SonicTH-SatAM Model Sheet Model Doomsday Project.png|Model of the Doomsday Project. From "Drood Hedge."
SonicTH-SatAM Model Sheet Huge Freighter Color Guide.png|Huge freighter, color guide. From "Drood Hedge."
SonicTH-SatAM Model Sheet Huge Freighter Color.png|In color.
</gallery>

===Backgrounds===
===="Heads or Tails"====
<gallery>
SonicTH-SatAM Background Veg-O-Matic Original.jpg|An unused background of the "[[Roboticization|Veg-O-Matic]]" machine.
SonicTH-SatAM Background Veg-O-Matic Original Zoom.jpg|Close-up.
SonicTH-SatAM Background Robotropolis Facility.png|The roboticization facility from the pilot's original opening.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Mobotropolis Unknown Lineart.png|Line art of Mobotropolis, likely from the original opening.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Model Sheet Background Mobotropolis Horizon.jpg|Another backdrop of Mobotropolis.
SonicTH-SatAM Background Mobotropolis Unknown 3.png|In color.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Lineart Background Robotropolis Pilot.jpg|Line art of Robotropolis.
SonicTH-SatAM Lineart Background Robotropolis Pilot 2.jpg|Additional line art.
SonicTH-SatAM Background Mobotropolis Unknown 3 Destroyed.png|Robotropolis.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Model Sheet Background Robotnik War Room Pilot.jpg|Robotnik's war room.
SonicTH-SatAM Background Power Ring Grotto Pilot Lineart.jpg|The original Power Ring Grotto, line art.{{intref|Sonic Legacy Series Book 1|italics=yes}}
SonicTH-SatAM Background Power Ring Grotto Pilot.png|Painted background.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Great Forest Path.png|Path in the Great Forest.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-010 Knothole.jpg|A dwelling in Knothole.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
</gallery>

====Season one====
<gallery>
SonicTH-SatAM Background Robotropolis Lineart-a.JPG|Line art of the sprawling Robotropolis.
SonicTH-SatAM Background Robotropolis Lineart Zoom.jpg|Close-up. 
SonicTH-SatAM Background Robotropolis Lineart.jpg|A photograph of the line art.{{ref|1=https://web.archive.org/web/20210301134843/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383844}}
SonicTH-SatAM Background Robotropolis Unknown Street.jpg|A street in Robotropolis.
SonicTH-SatAM Background Robotropolis Unknown Street Closeup.jpg|Close-up of upper section.
SonicTH-SatAM Background Robotropolis Unknown Street Closeup 2.jpg|Close-up of lower section.
SonicTH-SatAM Model Sheet Background Robotnik War Room.jpg|Dr. Robotnik's war room.{{ref|https://web.archive.org/web/20200412222200/https://twitter.com/KenPenders/status/1249462683205681153}}
SonicTH-SatAM Background Robotnik Throneroom.png|In color.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Robotropolis Downtown.jpg|An area downtown.{{ref|1=https://web.archive.org/web/20210301125929/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383845}}
SonicTH-SatAM Background Robotropolis Unknown.jpg|A section of wall in Robotropolis.{{ref|1=https://web.archive.org/web/20221228085944/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=383944}}
SonicTH-SatAM Background Great Plain.png|The great plain.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Waterfall 1 Lineart.png|A partial segment of line art for a waterfall backdrop.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Waterfall 1.png|The waterfall background in color.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Waterfall 2.png|Another waterfall.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Model Sheet Background Detention Area.jpg|Detention area.
SonicTH-SatAM Model Sheet Background Underground Airbase.jpg|Underground airbase. From "Sonic Boom."{{ref|https://web.archive.org/web/20210819012636/https://twitter.com/KenPenders/status/1249954776273416192}}
{{ref|https://web.archive.org/web/20200414070833/https://twitter.com/KenPenders/status/1249957545008984065}}
SonicTH-SatAM Background 238-201 Air Duct.JPG|An air duct within Robotropolis. From "[[Sonic Boom (episode)|Sonic Boom]]."
SonicTH-SatAM Model Sheet Background Robotropolis Streets.jpg|Robotropolis city center. From "Sonic Boom."{{ref|https://web.archive.org/web/20200412221822/https://twitter.com/KenPenders/status/1249461334149722115}}
SonicTH-SatAm Background 238-201 Robotropolis City Center.JPG|In color.
SonicTH-SatAM Background 238-201 Dark Swamp.JPG|The dark swamp. From "Sonic Boom."
SonicTH-SatAM Background Ironlock Prison 1.jpg|Ironlock Prison. From "Sonic Boom."
SonicTH-SatAM Background Ironlock Prison 2.jpg|Another version of Ironlock.
SonicTH-SatAM Background Ironlock Prison Cell.jpg|The interior of a cell.
SonicTH-SatAM Background 238-201 Underground Tunnel.JPG|An underground tunnel. From "Sonic Boom."
SonicTH-SatAM Background 238-201 Underground Cavern.jpg|An underground cavern. From "Sonic Boom."
SonicTH-SatAM Background Maga.jpg|The hidden city of Maga. From "Sonic and the Secret Scrolls."
SonicTH-SatAM Background Knothole Waterwheel Cottage.jpg|A Knothole cottage with a waterwheel. From "[[Super Sonic (episode)|Super Sonic]]."
SonicTH-SatAM Background 238-205 Int Pendulum Pit.jpg|A pendulum pit. From "Super Sonic."
SonicTH-SatAM Model Sheet Background 238-212 Ext Great Forest Day.png|An image of the Great Forest. From "[[Sonic Past Cool]]."
SonicTH-SatAM Model Sheet Background 238-212 Knothole Elevator Site.png|Elevator site in Knothole. From "Sonic Past Cool."
</gallery>

====Season two====
<gallery>
SonicTH-SatAM Background Great Forest Waterfall.png|The Power Ring Grotto.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Model Sheet Background Sally Hut.jpg|Sally's hut, with holographic projector.{{ref|https://web.archive.org/web/20200412221822/https://twitter.com/KenPenders/status/1249461334149722115}}
SonicTH-SatAM Model Sheet Background Knothole Meeting Area.jpg|Knothole meeting area.{{ref|https://web.archive.org/web/20200412221943/https://twitter.com/KenPenders/status/1249461909310427138}}
SonicTH-SatAM Background 238-302 GreatSwamp.jpg|Base camp in the Great Swamp. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 HighGreatUnknown.jpg|High above the Great Unknown. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 GreatUnknownBadland.jpg||Great Unknown badlands. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background Great Unknown Game Guy Lineart.png|Line art of swirling sands. From "Game Guy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAm Background 238-302 SwirlingSands.jpg|Swirling sands as seen through binoculars. From "Game Guy." {{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Background 238-302 FortressDoor Lineart Partial.png|Fortress door line art. From "Game Guy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-302 FortressDoor.jpg|Fortress Door. {{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 IntDarkBuilding.jpg|Initial interior of the fortress.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 GameRoom.jpg|The "game room" from eye level. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 GameRoom 2 Lineart Partial.png|Partial line art of the game room from above.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-302 GameRoom 2.jpg|In color, showing off the pinball field.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 Large Hanger.jpg|Large hanger. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-302 LargeCrawlSpace.jpg|Large crawl space. From "Game Guy."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-303 GothicBuilding Lineart Partial.png|Partial line art of an abandoned gothic building. From "[[No Brainer]]."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-303 GothicBuilding.jpg|Full image in color.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background Robotropolis Junkpile.png|Junk pile on outskirts of Robotropolis. From "No Brainer."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-303 RobotnikUndergroundBunker No Watermark.png|An underground bunker with roboticizer. From "No Brainer."
SonicTH-SatAM Background 238-303 RobotnikUndergroundBunker.jpg|A higher resolution version, with watermark.{{ref|https://web.archive.org/web/20220822151231/https://www.sonicsatam.com/information/behind-the-scenes/}}
SonicTH-SatAM Background Robotropolis Underground.png|Underground tunnel. From "No Brainer."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-303 KnotholeHut.jpg|Overhead view of Knothole. From "No Brainer."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-303 RobotnikHQStreet Lineart Partial.png|Partial lineart of Robotropolis street with Robotnik statue. From "No Brainer."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-303 RobotnikHQStreet.jpg|Full sized version in color.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-303 TreeStump.jpg|Tree stump interior in Knothole. From "No Brainer."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Model Sheet Interior Sonic Hut.jpg|Sonic's hut in Knothole. From "No Brainer."
SonicTH-SatAM Background Floating Island.png|The floating island, housing the time stones. From "Blast to the Past."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Floating Island Chamber.png|M.C. Escher-inspired corridor. From "Blast to the Past."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Mobotropolis Unknown 2.png|The city of Mobotropolis. From "Blast to the Past."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-304 Mobotropolis Chili Dog Stand.png|Chili dog stand. From "Blast to the Past."
SonicTH-SatAM Background 238-304 MobotropolisPalaceGrounds.jpg|Mobotropolis palace grounds. From "Blast to the Past."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-304 MobotropolisWarMinistry.jpg||The war ministry. From "Blast to the Past."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-304 Unknown.jpg|Rooftop. From "Blast to the Past."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-304 Royal Chamber.png|The royal chamber. From "Blast to the Past."
SonicTH-SatAM Background 238-304 RobotropolisChiliStand.jpg||Ruined chili dog stand. From "Blast to the Past."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-304 EarlyRobotisizer.jpg|The first roboticizer. From "Blast to the Past."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Model Sheet Background Uncle Chuck Hideout.jpg|Exterior of Uncle Chuck's hideout.
SonicTH-SatAM Background Uncle Chuck Hideout Exterior.png|In color.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Robotnik Bedroom Lineart.png|Line art of Robotnik's bedroom. From "Dulcy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Robotnik Bedroom.png|Full color version.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Great Unknown Location 2 Lineart.png|Shine in the desert, line art. From "Dulcy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Great Unknown Location 2.png|Full color version.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Dragons Nest Lineart Partial.png|Dragon's Nest partial line art. From "Dulcy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Dragons Nest.png|Full color version.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Dragons Nest Egg Lineart.png|A nest in Dragon's Nest. From "Dulcy."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Dragons Nest Egg.png|Color version.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-308 TheVoid 1.jpg|The Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 2.jpg|More of the Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 3 Lineart.png|Land mass in the Void.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-308 TheVoid 3.jpg|Color version.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 4.jpg|The Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 5.jpg|A swirl to the Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 6.jpg|The Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-308 TheVoid 7.jpg|One more of the Void.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-309A AntoineKitchen.jpg|Antoine's kitchen. From "The Odd Couple."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background Knothole Hut Winter.png|Knothole hut in winter. From "The Odd Couple."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Rotor Lab 1.png|Rotor's lab. From "Ro-Becca."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Rotor Lab 2 Lineart.png|More of Rotor's lab.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Rotor Lab 3 Lineart.png|Yet more of Rotor's lab.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Rotor Lab 3.png|In color.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Rotor Lab 4.png|Rotor's lab.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Knothole Bridge.png|A bridge in Knothole. Form "Ro-Becca."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Great Unknown Location 1.png|Great Canyon. From "Cry of the Wolf."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 1 Lineart.png|Home of the Wolf Pack. From "Cry of the Wolf."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 2 Sketch.png|Entrance area, with stairs, of the Wolf Pack's home. Sketch.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 2 Lineart.png|Cleaned up line art.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 3 Sketch.png|More of the Wolf Pack's home. Sketch.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 3 Lineart.png|Cleaned up line art.{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Cry of the Wolf 4 Sketch.png|Meeting area. From "Cry of the Wolf."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background RobotropolisRefinery.jpg|Refinery in Robotropolis. From "Spyhog."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background Uncle Chuck Hideout Interior.png|Uncle Chuck's hideout, interior. From "Spyhog."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Interrogation Room Lineart.png|Snively's interrogation room. From "Spyhog."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background 238-312 Interrogation Room.png|In color.
SonicTH-SatAM Model Sheet Background Command Center.jpg|The command center of the Doomsday Project. From "Spyhog."{{ref|https://web.archive.org/web/20200414070833/https://twitter.com/KenPenders/status/1249957545008984065}}
SonicTH-SatAM Background 238-312 CommandCenter.jpg|In color.{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Model Sheet Background Rear of Robotnik HQ.jpg|The rear of Robotnik's HQ. From "Spyhog."{{ref|https://web.archive.org/web/20210819012636/https://twitter.com/KenPenders/status/1249954776273416192}}
SonicTH-SatAM Background 238-313 DoomsdayProject.jpg|The first level of the Doomsday Project machine. From "The Doomsday Project."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background 238-313 IntFuelingRoom.jpg|Fueling room. From "The Doomsday Project."{{ref|https://web.archive.org/web/20191221131350/http://saturdaymorningsonic.com/gallery/production-art/concept-art--backgrounds/}}
SonicTH-SatAM Background Doomsday Project Pod Claw.png|The claw used in the creation of the doomsday pods. From "The Doomsday Project."
SonicTH-SatAM Background Doomsday Project Roboticizer.png|The roboticizer within the doomsday machine. From "The Doomsday Project."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
SonicTH-SatAM Background Doomsday Project Main Control Room.png|The main control room. From "The Doomsday Project."{{intref|[[Sonic the Hedgehog (TV_series)/Home releases#DVD 6|''Sonic the Hedgehog The Complete Series'' Bonus Feature]]}}
</gallery>

====''Sonic Underground'' repurposed model sheets====
During the development of ''Sonic Undergrounds'', a number of backgrounds developed for ''Sonic the Hedgehog'' were considered being reused for the show. While some did end up being repurposed such as Robotropolis, others such as the Knothole setting were not.

<gallery>
Sonic Underground Model Sheet Background Air Duct.jpg|Interior of an air duct in Robotropolis.
Sonic Underground Model Sheet Background Badlands.jpg|Badlands - edge of city.
Sonic Underground Model Sheet Background Detention Area.jpg|Detention area.
Sonic Underground Model Sheet Background Detention Area Jail Cell.jpg|Cell in detention area.
Sonic Underground Model Sheet Background Edge Of Big City.jpg|Edge of bit city.
Sonic Underground Model Sheet Background Elevator Shaft.jpg|Elevator shaft.
Sonic Underground Model Sheet Background Factory Interior.jpg|Factory interior.
SonicUnderground Development ExtForestatEdgeofBadland.jpg|Forest at edge of badlands.
SonicUnderground Development ExtGreatPlane.jpg|Great plains.
Sonic Underground Model Sheet Background Int Metal Staircase.jpg|Metal staircase.
SonicUnderground Development ExtKnotholeGarden.jpg|Knothole garden.
SonicUnderground Development ExtKnotholeHomes.jpg|Knothole home.
SonicUnderground Development IntKnotholeHome.jpg|Knothole home - interior.
SonicUnderground Development ExtKnotholeStoreroom.jpg|Knothole storeroom.
SonicUnderground Development ExtKnotholeWaterwheelCottage.jpg|Knothole waterwheel cottage.
SonicUnderground Development ExtKnothole.jpg|Knothole.
SonicUnderground Development ExtKnotholeRingGrotto.jpg|Knothole - ring grotto.
Sonic Underground Model Sheet Background Roboticizing Room.jpg|Robotnik's laboratory and roboticizing room.
Sonic Underground Model Sheet Background Robotropolis Alley.jpg|Robotropolis alley.
Sonic Underground Model Sheet Background Robotropolis City Center.jpg|Robotropolis city center and Robotnik's HQ.
Sonic Underground Model Sheet Background Robotropolis HQ Rooftop.jpg|Robotnik's HQ - rooftop.
Sonic Underground Model Sheet Background Robotropolis HQ Rooftop Detail.jpg|Rooftop in detail.
Sonic Underground Model Sheet Background Robotropolis Metal Factory.jpg|Metal factory complex.
Sonic Underground Model Sheet Background Robotropolis Street 2.jpg|Robotropolis street.
Sonic Underground Model Sheet Background Robotropolis With Factory.jpg|Factory entrance.
Sonic Underground Model Sheet Background Rundown Building.jpg|Rundown building - interior.
Sonic Underground Model Sheet Background Sewer.jpg|Sewer.
SonicUnderground Development ExtKnotholeSlideTree.jpg|Knothole slide tree.
Sonic Underground Model Sheet Background Tubular Conduit.jpg|Tubular conduit towards fan.
Sonic Underground Model Sheet Background Tubular Corridor.jpg|Tubular corridor.
Sonic Underground Model Sheet Background Tunnel Intersection.jpg|Tunnel intersection.
Sonic Underground Model Sheet Background Underground Airbase Stealthbot.jpg|Underground airbase with stealth-bot.
Sonic Underground Model Sheet Background Underground Cavern.jpg|Underground cavern.
Sonic Underground Model Sheet Background Underground Garage.jpg|Underground garage.
</gallery>

===Opening===
<gallery>
SonicTH-SatAM Animation Cel Logo.jpg|The logo of ''Sonic the Hedgehog''.{{ref|1=https://web.archive.org/web/20221224074358/http://ledastudios.rubberslug.com/gallery/inv_info.asp?ItemID=171154}}
SonicTH-SatAM Animation Cel Logo 2.jpg|Alternate version.{{ref|https://web.archive.org/web/20221211095805/https://www.facebook.com/PopKingInc/posts/sonic-the-hedgehog-concept-art-is-for-sale-now-on-ebay-through-our-daughter-comp/509493309183842/}}
SonicTH-SatAM Animation Cel Logo 3.jpg
SonicTH-SatAM Animation Cel Logo 4.jpg
SonicTH-SatAM Animation Cel Logo 5.JPG
SonicTH-SatAM Animation Cel Logo 6.jpg
SonicTH-SatAM Animation Cel Logo 7.JPG
SonicTH-SatAM Animation Cel Logo 8.JPG
SonicTH-SatAM Line Art Intro Alternate Expression 1.JPG|Sonic rushing towards Mobotropolis.
SonicTH-SatAM Line Art Intro Alternate Expression 1 Zoom.jpg|Close-up.
SonicTH-SatAM Line Art Intro Alternate Expression 2.JPG|Sonic continues to run. Different expression from the final.
SonicTH-SatAM Concept Art Background Title Sequence Mobotropolis.JPG|Early pencils of Mobotropolis.
SonicTH-SatAM Concept Art Background Title Sequence Mobotropolis Zoom.jpg|Close-up.
SonicTH-SatAM Line Art Intro Mobotropolis.jpeg|Final pencils of Mobotropolis.
SonicTH-SatAM Animation Cell Intro 1.jpg|Robotnik and a SWATbot.
SonicTH-SatAM Animation Cell Intro 1 Pencils.jpg|Pencils.
SonicTH-SatAM Animation Cell Intro 1 Paint.jpg|Painted.
SonicTH-SatAM Animation Cell Intro 1 Background.jpg|Background.
SonicTH-SatAM Animation Cell Intro 2.jpg|Sonic and Sally rushing out of the power plant.
SonicTH-SatAM Animation Cell Intro 2 Zoom.jpg|Close-up.
SonicTH-SatAM Animation Cell Intro 2 Pencils.jpg|Pencils.
SonicTH-SatAM Animation Cell Intro 2 Pencils Zoom.jpg|Close-up.
</gallery>

===Other===
<gallery>
SonicTH-SatAM Animation Cell Promotional Image.jpg|Promotional animation cel.
SonicTH-SatAM Animation Cell Promotional Image Lineart.png|Line art.
SonicTH-SatAM Development Image Post-It Note.png|A Post-It Note for internal use.
SonicTH-SatAM DVD Cover Concept 1.jpg|Concept art for the DVD release. By Ken Penders.{{ref|https://web.archive.org/web/20220521163917/https://twitter.com/KenPenders/status/1253953808058605569}}
SonicTH-SatAM DVD Cover Concept 2.jpg|An alternate concept sketch.{{ref|https://web.archive.org/web/20220521163917/https://twitter.com/KenPenders/status/1253953808058605569}}
</gallery>

==References==
<references />

{{StHTVOmni}}