Sonic the Hedgehog 3 & Knuckles/Hidden content
From Sonic Retro
- Back to: Sonic the Hedgehog 3 & Knuckles.
While in Angel Island Zone, jump on to one of the swinging vines, then press . A Ring sound will confirm correct entry. Press , then to return to the title screen. A new option, "Sound Test", will appear below "Competition". Select that option to go to the Level Select screen.
Enter the Level Select screen, then enter Mushroom Hill Zone. Grab onto a pulley system and press . A Ring sound will confirm correct entry. Press then to return to the title screen. Enter the Level Select, then select a level and press + to start the level with edit mode. During gameplay:
- Press to reverse gravity when in normal mode.
- Press + to cycle through all mapping frames of the character when in normal mode.
- Press to toggle normal and debug mode.
- During pause press to fade to black and restart from the SEGA screen.
- During pause press and hold to enable slow-motion (this proceeds at half-speed for as long as the button is held down).
- During pause press to advance one frame.
- Current coordinates are designated by the top line of hex digits in the HUD.
- Viewport coordinates are designated by the bottom line of hex digits in the HUD.
Enabling edit mode will disable all restrictions on the level select, allowing the player to use characters normally forbidden from accessing certain levels.
Eighth Special Stages
- See also: Step-by-step tutorial on YouTube.
The eighth Special Stages from both Sonic the Hedgehog 3 and Sonic & Knuckles can be accessed in this game. First, enable edit mode (see above), then set the sound test to 07, and press + on the "Special Stage 1" selection to get the eighth Special Stage from Sonic 3, or on the "Special Stage 2" selection to get the eighth Special Stage from Sonic & Knuckles.
Both Special Stages will award a yellow Chaos Emerald and Super Emerald respectively when cleared (whereas the eighth Chaos Emerald was gray in Sonic 3). These Emeralds have no special effect in-game, however, and do not appear on the Special Stage results tally in any form other than a score increase.
Note that setting the sound test to any other value between 00-06 will load their respective Special Stages.
Placeable in edit mode
|An "S" monitor. This transforms Sonic, Tails and Knuckles into Hyper Sonic, Super Tails and Hyper Knuckles respectively.|
|A breakable wall in Angel Island Zone Act 2, which can only be placed with debug mode and is destroyed with a Spin Dash on the ground. A similar object is used as a wall that is opened with a switch. Remains unused from Sonic 3 alone.|
|A button of unknown purpose. It can be placed in either Act of Carnival Night Zone via debug mode, but it doesn't appear to do anything. Remains unused from Sonic 3 alone.|
|An unknown Ring-like object that appears to spawn slope collision when placed. It is placeable in Carnival Night Zone. Remains unused from Sonic 3 alone.|
|A glowing block that can be placed in either Act of IceCap Zone via debug mode. Jumping on it destroys it like the ice blocks. Remains unused from Sonic 3 alone.|
|A lava stepping stone for the second Act of Lava Reef Zone. Similar objects exist in Act 1, but this unique art for Act 2 is never seen.|
|A platform for the Glowing Spheres Bonus Stage.|
|"F" gumball, placeable in Glowing Spheres Bonus Stage. When collected it makes the same noise as a Bumper Ball, but it doesn't do anything.|
|Some strange platform. It's not placed in any level, but the graphics fit perfectly in both acts of Launch Base Zone. It has no movement on its own when placed and needs specific PAR codes to be entered to do so. To enable it use the PAR code 1EFC52:1200 and it will replace the first ring monitor. From there enter FFF7E0:00FF to make it move down and FFF7E0:0000 to make it return to its original position. The object was found by shobiz, and posted about in this thread.|
|26||The Sonic 3 staff roll music still exists within the game and can be played in the Stage select/Sound test. Of all the Sonic 3 tracks that were replaced by their Sonic & Knuckles counterparts, only this song wasn't replaced.|
|32||A "game clear" jingle for Sonic & Knuckles. Though Sonic 3 used this ID for its own jingle played during the ending, it isn't used in Sonic 3 & Knuckles at all. A longer version of this jingle can be heard at the end of the credits medley. Sonic Origins would later use the jingle for the results tally after Sonic and/or Tails defeat Big Arms.|
Even when locked-on with Sonic 3, some sounds still go unused.
|3A,71||Shield sound leftover from Sonic the Hedgehog 2|
|40||An electric zap heard among the Shield sound effects. This sound would later be used for the Thunder Shield in Sonic Generations and Sonic Lost World, and for the Phantom Egg's barrier in Sonic Mania.|
|5A||Sounds like something revving up. This would later be used in Sonic 3D: Flickies' Island.|
|6B||Unknown, possibly unused; sounds like a higher-pitched version of the sound heard when hitting an R, Up or Down block in the Sonic 1 Special Stage.|
|6D||Sounds like a door closing.|
|7D||Sounds like mild rattling.|
|84||Sounds like something charging up. Only seems to be referenced in some Zone with a high level ID which is composed of garbage data.|
|85||Sounds like it would have been used in cooperation with sound 84.|
|8D||Unknown, possibly unused; a very quiet sound.|
|8E||Another rev-up sound. Sonic Origins uses this sound for the wheel switches in Marble Garden Zone.|
|99||A small "tick" sound.|
|A1||A low-humming, unsettling sound. This sound effect is later used by the Hotaru Hi-Watt mini-boss in Sonic Mania.|
|A5||Sounds like something rising or powering up?|
|A6||Another dashing noise.|
|B5||A leftover from Sonic 1 that was used for the breakable diamonds in the Special Stage.|
|BC||Unused? Possible waterfall sound effect.|
|C5||Sounds like it would be used in coordination with sound C4, the sound for Red Eye's laser. Sonic Origins uses this sound when Red Eye stops firing its laser.|
|D1||Possibly unused; another very faint sound that may sound like static.|
|D8||Sounds like a screeching warning siren. Repeatedly pressing the button when playing this sound in the Sound Test makes it play longer.|
|DD-DF||All of these sounds are duplicates of DB (heard when running across water in Hydrocity Zone) and are likely placeholders.|
|Sonic the Hedgehog 3|
|Sonic & Knuckles|