View source for Sonic the Hedgehog 2 (16-bit)/Hidden content

{{back}}

==Level select==
{{HiddenContent
| image1=S2 level select.png
| desc=Play songs 19, 65, 09, 17 on the options screen, then hold {{A}}+{{start}} on title screen.
}}
==[[Edit mode]]==
{{HiddenContent
| image1=Sonic2 MD DebugMode.png
| desc=From the level select menu, play songs 01, 09, 09, 02, 01, 01, 02, 04 (1992-11-24 - the worldwide launch date of ''Sonic 2''). A [[Ring]] sound should trigger. Select a Zone and hold {{A}} until the title card disappears.

Edit mode does not work when playing as [[Miles "Tails" Prower|Tails]] in this game, even though the counters for debug mode are still intact here.
}}

==[[Night mode]]==
{{HiddenContent
| image1=Sonic2 MD NightMode.png
| desc=After enabling edit mode, select a level on the level select screen and hold {{C}}+{{Start}} until the title card disappears.
}}
==Get all Chaos Emeralds==
{{HiddenContent
| noimage=yes
| desc=From the level select menu, play songs 04, 01, 02, 06 on the sound test and a [[Chaos Emerald]] sound effect will trigger. This immediately gives the player all seven Chaos Emeralds, enabling [[Super Sonic]].
}}
==Swap Tails for Miles==
{{HiddenContent
| image1=Sonic2 MD Comparison OptionsJP.png
| desc=Press {{up}} {{down}} {{down}} {{down}} {{up}} at the title screen. This will cause all instances of "Tails" to change to "Miles", except in the Japanese version where the reverse will happen. This also toggles the trademark symbols on the Sega logo and the title screen.
}}
==[[Continue|14 continues]]==
{{HiddenContent
| image1=Sonic2 MD 14Continues.png
| desc=Play songs 01, 01, 02, 04 on the options screen. An incorrect sound command is issued, causing [[Oil Ocean Zone]] music to continue playing until a reset. 
}}

==Unused content==
===Art===
====Tiles====
{{UnusedTable|type=Art|
{{UnusedRow
| content={{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=017
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=01B
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=081
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=08D
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=093
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0B2
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0B3
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0C8
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0C9
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0D0
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0D1
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0DB
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0DC
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0F3
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=0F4
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=114
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=11C
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=11D
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=11E
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=123
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=124
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=125
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=126
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=127
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=128
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=129
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12A
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12B
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12C
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12D
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12E
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=12F
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=130
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=131
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=134
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=139
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=13A
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=13F
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=141
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=144
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=146
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=147
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=157
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=15B
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=182
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=183
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=184
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=187
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=189
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=18A
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=18E
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=1AB
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=20F
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=210
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=216
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=217
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=218
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=250
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=25E
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=262
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=263
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=270
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=272
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=27E
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=28A
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=28B
}}
{{GetTile
| image=Sonic2 MD Map OOZ blocks.png
| tilesize=16
| id=293
}}
| desc=The old ball launcher among other graphics in [[Oil Ocean Zone]].

Tile IDs: 017, 01B, 081, 08D, 093, 0B2, 0B3, 0C8, 0C9, 0D0, 0D1, 0DB, 0DC, 0F3, 0F4, 114, 11C, 11D, 11E, 123, 124, 125, 126, 127, 128, 129, 12A, 12B, 12C, 12D, 12E, 12F, 130, 131, 134, 139, 13A, 13F, 141, 144, 
146, 147, 157, 15B, 182, 183, 184, 187, 189, 18A, 18E, 1AB, 20F, 210, 216, 217, 218, 250, 25E, 262, 263, 270, 272, 27E, 28A, 28B, 293.
}}

{{UnusedRow
| content={{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=023
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=024
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=025
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=026
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=028
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=029
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=048
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=049
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04A
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04B
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04C
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04D
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04E
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=04F
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=050
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=051
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=052
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=053
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=054
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=055
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=056
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=057
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=058
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=059
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05A
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05B
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05C
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05D
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05E
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=05F
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=060
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=061
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=062
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=064
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=065
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=066
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=067
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=068
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=09F
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=0C2
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=134
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=135
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=136
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=137
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=138
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=139
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13A
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13B
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13C
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13D
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13E
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=13F
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=140
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=141
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=142
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=143
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=144
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=145
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=147
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=174
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=17B
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=196
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=197
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=198
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=199
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=19A
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=19B
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=19C
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=19D
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=19E
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1A1
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1A2
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1AF
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B0
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B1
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B2
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B3
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B4
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B5
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B6
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B7
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B8
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1B9
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BA
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BB
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BC
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BD
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BE
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1BF
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C0
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C1
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C2
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C3
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C4
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1C5
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1E4
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1E6
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1E7
}}
{{GetTile
| image=Sonic2 MD Map MZ blocks.png
| tilesize=16
| id=1E8
}}
| desc=Remnants of the diagonal platforms and some unused grey pipes in [[Metropolis Zone]].

Tile IDs: 023, 024, 025, 026, 028, 029, 048, 049, 04A, 04B, 04C, 04D, 04E, 04F, 050, 051, 052, 053, 054, 055, 056, 057, 058, 059, 05A, 05B, 05C, 05D, 05E, 05F, 060, 061, 062, 064, 065, 066, 067, 068, 09F, 0C2, 134, 135, 136, 137, 138, 139, 13A, 13B, 13C, 13D, 13E, 13F, 140, 141, 142, 143, 144, 145, 147, 174, 17B, 196, 197, 198, 199, 19A, 19B, 19C, 19D, 19E, 1A1, 1A2, 1AF, 1B0, 1B1, 1B2, 1B3, 1B4, 1B5, 1B6, 1B7, 1B8, 1B9, 1BA, 1BB, 1BC, 1BD, 1BE, 1BF, 1C0, 1C1, 1C2, 1C3, 1C4, 1C5, 1E4, 1E6, 1E7, 1E8.
}}

{{UnusedRow
| content={{GetTile
| image=Sonic2 MD Map SCZ blocks.png
| tilesize=16
| id=259
}}
{{GetTile
| image=Sonic2 MD Map SCZ blocks.png
| tilesize=16
| id=262
}}
{{GetTile
| image=Sonic2 MD Map SCZ blocks.png
| tilesize=16
| id=268
}}
{{GetTile
| image=Sonic2 MD Map SCZ blocks.png
| tilesize=16
| id=27C
}}
| desc=Some unused clouds in [[Sky Chase Zone]].

Tile IDs: 259, 262, 268, 27C
}}

{{UnusedRow
| content={{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=147
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=14D
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=151
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=157
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=162
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=16C
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=1BB
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=1F8
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=1FE
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=1FF
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=201
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=210
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=211
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=215
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=219
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=21A
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=227
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=228
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=2A0
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=2A2
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=2B7
}}
{{GetTile
| image=Sonic2 MD Map WFZ blocks.png
| tilesize=16
| id=2E3
}}
| desc=[[Wing Fortress Zone]] tiles, possibly also desgined for Sky Chase Zone.

Tile IDs: 147, 14D, 151, 157, 162, 16C, 1BB, 1F8, 1FE, 1FF, 201, 210, 211, 215, 219, 21A, 227, 228, 2A0, 2A2, 2B7, 2E3.
}}
}}

====Sprites====
{{UnusedTable|type=Art|
{{UnusedRow
| content=
| desc=An animation very similar to one used in [[Wing Fortress Zone]] when [[Sonic the Hedgehog|Sonic]] grabs the panels on the side of the ship. However, this is vertical. Its frame IDs are '''52''' and '''53'''.
}}
{{UnusedRow
| content=
| desc=An alternate death frame for Sonic, defined in animation '''16''' with a frame ID of '''5E'''. This returns from (and is also unused in) ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]''. 
}}
{{UnusedRow
| content={{spriteImage|Sonic2 MD Sprite CPZSirenLights.gif|2}}
| desc=Unused decorative objects for [[Chemical Plant Zone]], stored at '''0x0383-0x0393''' in VRAM. These can be placed in the [[Sonic the Hedgehog 2 (2013)|iOS/Android 2013 version]]'s debug mode. 
}}
{{UnusedRow
| content={{spriteImage|Spr_cpzboss.gif}}
| desc=An animation for [[Water Eggman]] which shows [[Dr. Eggman]] dropping chemicals on himself. This animation has been around since the [[Sonic the Hedgehog 2 (Nick Arcade prototype)|Nick Arcade prototype]], but it was never implemented. A fix to implement the lost animation can be found [[SCHG How-to:Restore lost CPZ boss feature|here]].
}}
{{UnusedRow
| content={{spriteImage|Sonic2 MD Sprite OOZSpringHolder.png}}
| desc=A holder for [[Oil Ocean Zone]]'s ball and spring object (see below). This appeared in the Simon Wai prototype, and is still loaded into VRAM in the final game.
}}
{{UnusedRow
| content=
| desc=An unused animation for [[Aquis]] spitting up oil, along with an oil spray.
}}
{{UnusedRow
| content={{spriteImage|Balkiry2.png}}
| desc=Unused frame of the [[Balkiry]] badnik with landing gear. It's possible that they were originally intended to take off from the [[Wing Fortress Zone]] as it passed by. If a Balkiry is selected in debug mode, this sprite will be seen instead of its flying one.
}}
{{UnusedRow
| content={{spriteImage|S2-Turtle.gif|2}}
| desc=Walking sprites of [[Tocky]], who pops out of the [[Badnik]]s in [[Sky Chase Zone]]. Normally the player will never see this, since the animal never has the opportunity to hit the ground. In order to see it, the player must use debug mode to create and destroy a Badnik while the Wing Fortress passes by. This animation would later make an appearance in ''[[Sonic Mania]]'', as Tocky can be found in [[Titanic Monarch Zone]].
}}
{{UnusedRow
| content={{spriteImage|S2-Picky.gif|2}}
| desc=[[Picky]], a returning animal from the original ''Sonic the Hedgehog'', is present in [[Death Egg Zone]]. However, there are no Badniks or animal capsules, so he's never seen.
}}
{{UnusedRow
| content={{spriteImage|Sonic2-RobotnikLaugh.gif|2}}
| desc=In [[Death Egg Zone]], getting hit with one or more [[Ring]]s during the [[Mecha Sonic (Sonic the Hedgehog 2 16-bit boss)|Mecha Sonic]] battle causes Eggman to laugh. However, this is never actually seen outside of debug mode because the Zone has no Rings. In the 2013 mobile remake, this animation can be seen normally if the player dies during the fight.  In ''[[3D Sonic the Hedgehog 2]]'' it can also be seen if the player is hurt by Mecha Sonic if the Ring Keeper mode is on.
}}
{{UnusedRow
| content={{spriteImage|HPZiconS2.png|2}}
| desc=Level Select icon for [[Hidden Palace Zone]], which never made it into the final game.  The art however, is present in [[Sonic the Hedgehog 3|''Sonic 3''<nowiki>'</nowiki>s]] level select. Pro Action Replay code '''0096D8:0303''' will cause it to replace the [[Emerald Hill Zone]] icon in the Stage Select.
}}
}}

===Objects===
====Placeable in [[edit mode]]====
{{UnusedTable|type=Art|
{{UnusedRow
| content={{spriteImage|Aquatic ruin door.png}}
| desc=Unused door barriers for [[Aquatic Ruin Zone]], which function like the door barriers found in other Zones.
}}
{{UnusedRow
| content={{spriteImage|Sonic2-mrzobject.png}}
| desc=A strange platform made of [[Ring]]s in [[Mystic Cave Zone]]. When placed, this object will slowly swing in an anti-clockwise direction and can be stood on. This object has existed since the [[Sonic the Hedgehog 2 (Simon Wai prototype)|Simon Wai prototype]], and its object ID is '''$73'''.
}}
{{UnusedRow
| content={{SpriteImage|Sonic2PreBeta MD Sprite OOZ Ball.png}} {{SpriteImage|S2button.png}}
| desc=A ball and spring object, which can be placed in [[Oil Ocean Zone]]. If a [[button]] is placed near it and pressed, the ball will pop out and start rolling in whichever direction Sonic was facing when the object was placed. It does not collide with objects (such as breakable floors or elevators), and it will go up slopes and even vertical walls without slowing or stopping. It is used in the [[Sonic the Hedgehog 2 (Simon Wai prototype)|Simon Wai]] and [[Sonic the Hedgehog 2 (alpha)|alpha]] prototypes. Its object ID is '''$46'''.
}}
{{UnusedRow
| content={{SpriteImage|Sonic2Alpha MD Sprite OOZTube.png}}
| desc=A horizontal version of the breakable pressure stopper in Oil Ocean Zone. These can be jumped on, but they will send Sonic and Tails left or right rather than up. Once Sonic is travelling, the player can't make him stop unless he collides with an object - even in edit mode the player will continue to travel. This would have been used in the Simon Wai layout of the Zone, but has no purpose in the final layout.
}}
{{UnusedRow
| content={{spriteImage|Sonic2-giantlaser.gif}}
| desc=Large laser shooting through a spinning platform in [[Wing Fortress Zone]]. If the sub-ID of the spinning platforms has bit '''02''' of their subtype set but not '''04''', they will become this object. Its object ID is '''$B7'''.
}}
{{UnusedRow
| content={{spriteImage|Sonic2-wfz-spinnything2.gif|2}}
| desc=Weird spinning pole in [[Wing Fortress Zone]] that acts like a [[Badnik]] - the player can destroy it, and it can hurt them, but it doesn't actually move. Its object ID is '''$BF'''.
}}
}}

====Others====
{{UnusedTable|type=Art|
{{UnusedRow
| content={{spriteImage|Sonic2 MD Sprite Monitors.png|2|crop_width=30}}
| desc=A static or blank [[monitor]] which harms the player when broken. Never seen in-game. To see it, a monitor's subtype should be set to '''00'''.
}}
{{UnusedRow
| content=
| desc=A hovering platform for [[Chemical Plant Zone]] that has been around since the Nick Arcade prototype. Every 1024 frames, it will slowly rise up for 128 frames, float in the air, then come back down 128 frames later. The amount of time it floats in the air is 128*(lower four bits of subtype) frames. The upper four bits can be used to offset when it starts to rise in the air. Its object ID is '''$0C'''.
}}
{{UnusedRow
| content=
| desc=The blue bubble snakes in Chemical Plant Zone have many subtypes that define their movement pattern ('''00'''-'''0F''' for jumping back and forth, '''10'''-'''1F''' for jumping between the floor and ceiling) and their length, which can be any number of segments between 1 and 16. However, only those that are 6 segments long are used (subtypes '''05''' and '''15'''), leaving all other subtypes unused.
}}
{{UnusedRow
| content=
| desc=Although very similar to the small platforms used in [[Metropolis Zone]], this platform behaves strangely, usually rising at an angle. Its object ID is '''$6C'''.
}}
{{UnusedRow
| content=
| desc=The emerald-shaped object that was used in Hidden Palace Zone to block off a tube. The graphics are long gone, but the code is still there. It's a simple solid indestructible object and its coding hasn't changed since the Nick Arcade prototype. Its object ID is '''$12'''.
}}
{{UnusedRow
| content=
| desc=The waterfall object from Hidden Palace Zone, which is also left over. Again, the graphics no longer exist in the ROM. Its height is equal to 16*(lower five bits of subtype)+16 pixels. Placing one with a subtype greater than '''17''' will spawn garbage objects on the right. Its object ID is '''$13'''.
}}
{{UnusedRow
| content=
| desc=The spinning log spikes from ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]''<nowiki>'</nowiki>s [[Green Hill Zone (Sonic the Hedgehog 16-bit)|Green Hill Zone]]. Unfortunately, the graphics have been deleted, but the coding is intact. Its object ID is '''$17'''.
}}
}}

===Score tally===
{{HiddenContent
| image1=Sonic2UnusedScoreTally.png
| desc=This configuration of the score tally is unused but was meant for Zones with a single Act ([[Sky Chase Zone]], etc). It can be made to appear by using debug mode and placing, then breaking a capsule.
}}

===Level chunks===
====Emerald Hill Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=01
}}¦01
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=05
}}¦05
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=0E
}}¦0E
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=15
}}¦15
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=17
}}¦17
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=32
}}¦32
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=56
}}¦56
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=7A
}}¦7A
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=7F
}}¦7F
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=A6
}}¦A6
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=AE
}}¦AE
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=D2
}}¦D2
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=D8
}}¦D8
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=D9
}}¦D9
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=DA
}}¦DA
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=DC
}}¦DC
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=E7
}}¦E7
|{{GetTile
| image=Sonic2 MD Map EHZ chunks.png
| tilesize=128
| id=ED
}}¦ED
}}


====Chemical Plant Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map CPZ chunks.png
| tilesize=128
| id=1D
}}¦1D
|{{GetTile
| image=Sonic2 MD Map CPZ chunks.png
| tilesize=128
| id=4A
}}¦4A
|{{GetTile
| image=Sonic2 MD Map CPZ chunks.png
| tilesize=128
| id=89
}}¦89
}}

====Casino Night Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=22
}}¦22
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=30
}}¦30
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=44
}}¦44
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=48
}}¦48
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=49
}}¦49
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=50
}}¦50
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=53
}}¦53
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=54
}}¦54
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=57
}}¦57
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=5A
}}¦5A
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=6D
}}¦6D
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=6F
}}¦6F
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=70
}}¦70
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=72
}}¦72
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=77
}}¦77
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=7C
}}¦7C
|{{GetTile
| image=Sonic2 MD Map CNZ chunks.png
| tilesize=128
| id=EA
}}¦EA
}}

====Hill Top Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=A6
}}¦A6
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=AE
}}¦AE
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=D2
}}¦D2
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=D8
}}¦D8
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=D9
}}¦D9
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=DA
}}¦DA
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=DC
}}¦DC
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=E7
}}¦E7
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=ED
}}¦ED
|{{GetTile
| image=Sonic2 MD Map HTZ chunks.png
| tilesize=128
| id=F5
}}¦F5
}}

====Mystic Cave Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=1E
}}¦1E
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=3A
}}¦3A
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=4F
}}¦4F
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=88
}}¦88
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=CA
}}¦CA
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=CD
}}¦CD
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=CE
}}¦CE
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=CF
}}¦CF
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=D0
}}¦D0
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=D1
}}¦D1
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=D7
}}¦D7
|{{GetTile
| image=Sonic2 MD Map MCZ chunks.png
| tilesize=128
| id=E6
}}¦E6
}}

====Oil Ocean Zone====
None of the chunks listed here are referenced in the table that the game checks to determine whether or not Sonic & Tails should slide.
{{gallery
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=09
}}¦09
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=2B
}}¦2B
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=2C
}}¦2C
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=59
}}¦59
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=5E
}}¦5E
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=62
}}¦62
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=6D
}}¦6D
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=73
}}¦73
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=76
}}¦76
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=79
}}¦79
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=81
}}¦81
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=84
}}¦84
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=86
}}¦86
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=8A
}}¦8A
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=94
}}¦94
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=97
}}¦97
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=9E
}}¦9E
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=A0
}}¦A0
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=A5
}}¦A5
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=A6
}}¦A6
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=A9
}}¦A9
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=AA
}}¦AA
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=B2
}}¦B2
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=BC
}}¦BC
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=CC
}}¦CC
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=D0
}}¦D0
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=D2
}}¦D2
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=D3
}}¦D3
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=D6
}}¦D6
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=DB
}}¦DB
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=DC
}}¦DC
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=DE
}}¦DE
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=E0
}}¦E0
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=E9
}}¦E9
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=EA
}}¦EA
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=F0
}}¦F0
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=F5
}}¦F5
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=F6
}}¦F6
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=F8
}}¦F8
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=F9
}}¦F9
|{{GetTile
| image=Sonic2 MD Map OOZ chunks.png
| tilesize=128
| id=FF
}}¦FF
}}

====Metropolis Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=03
}}¦03
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=69
}}¦69
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=79
}}¦79
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=7D
}}¦7D
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=8A
}}¦8A
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=B6
}}¦B6
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=D0
}}¦D0
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=D5
}}¦D5
|{{GetTile
| image=Sonic2 MD Map MZ chunks.png
| tilesize=128
| id=DC
}}¦DC
}}

====Wing Fortress Zone====
{{gallery
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=43
}}¦43
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=48
}}¦48
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=4F
}}¦4F
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=57
}}¦57
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=62
}}¦62
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=98
}}¦98
|{{GetTile
| image=Sonic2 MD Map WFZ chunks.png
| tilesize=128
| id=DD
}}¦DD
}}

===Background data===
====Aquatic Ruin Zone====
Code exists to scroll part of the top tree background layer at a different rate, giving the impression it is closer to the camera. As the code executes, the effect is reverted, so cannot be not seen without hacking. It is theorised that this may be a leftover from an early version of the level, as with the final art the seam is quite obvious.

====Hill Top Zone====
Hill Top Zone's background is partially optimised for 2-player mode; the background scrolls independently for both players, which cannot be said for other 1-player only levels. However, the parallax effect for the clouds is missing and some parts are corrupted, and while sharing data with Emerald Hill Zone means the foreground also renders correctly, objects are not optimised, meaning the experience is still noticeably buggy.

The final version of Hill Top Zone is also not suited to 2-player thanks to some level gimmicks, such as its inside lava sections; these make it impossible to back-track to the beginning of the stage by creating dead-ends, so if the two players were at opposite ends, the slower player would in theory get stuck.

====Oil Ocean Zone====
Due to the way scrolling is handled in Oil Ocean Zone, part of the background is never seen.

===Audio===
====Music====
{{UnusedTable|type=Audio|
{{UnusedRow
| content=
| desc=In the sound test, song '''$10''' is a unused song. This has been established to be the music meant for [[Hidden Palace Zone]].
}}
}}

====Sound effects====
Sounds not used anywhere in the game can be heard in the sound test, some of which are leftovers from the original ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]''.
{| class="prettytable" style="width:auto;"
!Audio !!ID !!Description
|-
!colspan=3|''Sonic the Hedgehog'' leftovers
|-
|[[File:Sonic2 MD Sound29.ogg]]
|'''29'''
|The sound for touching the R, Up, and Down [[Special Stage (Sonic the Hedgehog 16-bit)|Special Stage]] blocks.
|-
|[[File:Sonic2 MD Sound31.ogg]]
|'''31'''
|[[Scrap Brain Zone]] electricity.
|-
|[[File:Sonic2 MD Sound3A.ogg]]
|'''3A'''
|The sound for touching the colour-changing diamonds in the Special Stage.
|-
|[[File:Sonic2 MD Sound43.ogg]]
|'''43'''
|The sound for entering [[Giant Ring]]s at the end of an Act.
|-
|[[File:Sonic2 MD Sound47.ogg]]
|'''47'''
|The chain pulling sound from [[Marble Zone]].
|-
|[[File:Sonic2 MD Sound49.ogg]]
|'''49'''
|The bonus point tags found at the end of an Act.
|-
!colspan=3|Other sounds
|-
|[[File:Sonic2 MD Sound38.ogg]]
|'''38'''
|Sounds similar to the sound of spikes popping up. Also unused in ''Sonic 1''.
|-
|[[File:Sonic2 MD Sound51.ogg]]
|'''51'''
|Unknown. Sounds like something popping or skidding on the ground.
|-
|[[File:Sonic2 MD Sound52.ogg]]
|'''52'''
|A low siren, similar to '''$53''' which is used in the 2-Player mode.
|-
|[[File:Sonic2 MD Sound68.ogg]]
|'''68'''
|Sounds like a slightly shorter version of Mystic Cave Zone's bridges stopping in place ('''$69''').
|}

==Level slots==
Like its predecessor, ''Sonic 2'' on the Mega Drive lays out its levels in a different order internally to how the player sees them when playing through the game. It gives some clues as to what the original progression looked like, and the differences are quite significant.

The internal level order can be seen by using [[Pro Action Replay]] code (FFFE10:??00), substituting the question marks with the hexadecimal values for the level slots described in the table below and then attempting to enter any level (any number past 10 crashes the game). [[Metropolis Zone]] covers two level slots as it has three Acts.

{|class="prettytable sortable" style="width:auto;"
! Level slot
! Level name
! In-game order
! Comments
|-
| 00
| [[Emerald Hill Zone]]
| 01
|
|-
| 01
| Unknown
|
| Plays Emerald Hill Zone's music.
|-
| 02
| [[Wood Zone]]
| Scrapped
| Palette is all that remains. Plays Metropolis Zone's music.
|-
| 03
| Unknown
|
| Plays Oil Ocean Zone's music.
|-
| 04
| [[Metropolis Zone]]
| 08
|
|-
| 05
| [[Metropolis Zone]] (Act 3)
| 09
|
|-
| 06
| [[Wing Fortress Zone]]
| 11
|
|-
| 07
| [[Hill Top Zone]]
| 05
|
|-
| 08
| [[Hidden Palace Zone]]
| Scrapped
| Palette and object/ring locations remain. Plays unused track #10.
|-
| 09
| Unknown
|
| Plays Sky Chase Zone's music.
|-
| <span style="display:none;">10</span>0A
| [[Oil Ocean Zone]]
| 07
|
|-
| <span style="display:none;">11</span>0B
| [[Mystic Cave Zone]]
| 06
|
|-
| <span style="display:none;">12</span>0C
| [[Casino Night Zone]]
| 04
|
|-
| <span style="display:none;">13</span>0D
| [[Chemical Plant Zone]]
| 02
|
|-
| <span style="display:none;">14</span>0E
| [[Death Egg Zone]]
| 12
| Occupied by [[Genocide City Zone]] in prototypes.
|-
| <span style="display:none;">15</span>0F
| [[Aquatic Ruin Zone]]
| 03
|
|-
| <span style="display:none;">16</span>10
| [[Sky Chase Zone]]
| 10
|
|}

This order is mirrored (with empty slots cut out) by some prototype level select screens. All empty slots are fundamentally broken, loading varying amounts of graphics data from Emerald Hill Zone (depending on the build).

Three slots in the game remain empty in all versions of ''Sonic 2'' (save for the very early [[Sonic the Hedgehog 2 (Nick Arcade prototype)|Nick Arcade prototype]] which is using the ''Sonic 1'' level order). There has been much speculation over the years about what these slots were reserved for (if anything) - possible candidates include [[Brenda Ross]]'s "desert" and "winter" zones which were thought to be at least partially complete, or possibly Genocide City Zone before it was transformed into Metropolis Zone Act 3. The team are known to have explored many level ideas during development, most of which did not make it past the design stage.

Commentary found in the ''[[Sonic Jam]]'' strategy guide reveals that the level order could have been even more different. It states that [[Chemical Plant Zone]] was meant to be the 10th Zone back when the game was planned as an 18-Zone game.

===Unused slots===
In all cases, Acts 1 and 2 are identical. Metropolis "Act 4" loads a duplicate of Metropolis Act 3 (with a different starting position) while "Act 2" of Sky Chase, Wing Fortress and Death Egg load their Act 1 counterparts without objects.
<gallery>
Sonic2 MD Slot01.png|01 (unknown)
SonictheHedgehog2-WoodZone.png|02 ([[Wood Zone]])
Sonic2 MD Slot03.png|03 (unknown)
Sonic2 MD HPZ Start.png|08 ([[Hidden Palace Zone]])
Sonic2 MD Slot03.png|09 (unknown)
</gallery>

==Inaccessible Rings==
There are some levels that have Rings in places that can't be reached normally. This makes getting a [[Perfect Bonus]] in these stages impossible.{{ref|1=http://tcrf.net/Sonic_the_Hedgehog_2_(Genesis)#Inaccessible_Rings}}

{| class="prettytable"
!style="width:320px"|Screenshot
! Level
! Approximate coordinates 
! Description
|-
|{{Bobscreen|Sonic2AquaticRuinZone-Rings.png}}
|Aquatic Ruin Zone Act 2
|1FA90626
|Two horizontally lined rings.
|-
|{{Bobscreen|Sonic2CasinoNightZone-Rings.png}}
|Casino Night Zone Act 2
|027F00F8
|Two groups of seven rings. These are right at the start of the level but cannot be reached with a jump or using nearby objects.
|-
|{{Bobscreen|Sonic2MysticCaveZone-Rings1.png}}{{Bobscreen|Sonic2MysticCaveZone-Rings2.png}}
|Mystic Cave Zone Act 2
|16050156<br>1712016D
|Three horizontally lined rings, and a nearby curve of rings, similar to ones found near swings. Both sets of rings are found in the ceiling.
|-
|{{Bobscreen|Sonic2OilOceanZone-Rings1.png}}{{Bobscreen|Sonic2OilOceanZone-Rings2.png}}{{Bobscreen|Sonic2OilOceanZone-Rings3.png}}
|Oil Ocean Zone Act 2
|1A0001F8<br>0B9F03B0<br>1245021C
|Three horizontally lined rings, close to the launcher and invincibility monitor. Three vertically lined rings stuck in a block which prohibits access to them. Rings in a upside down v shape pattern. They are stuck inside the wall, thus unaccessable.
|-
|{{Bobscreen|Sonic2MetropolisZone-Rings.png}}
|Metropolis Zone Act 2
|02C0043F
|Three slanted rings, in the floor that has a ten-ring monitor and a cog close-by.
|}

==Cheat device codes==
These are cheat codes that can only be used with game enhancer devices. Support for these codes is available in most emulators. There are two versions of this game. If one code doesn't work on your game, then try the other.

===[[Game Genie (Mega Drive)|Game Genie]]===
==== Official codes (REV00)====
{{CodeTable|official=yes|
{{CodeRow|SATA-DJTJ|[[Rings]] worth 2 (player 1). 	}}
{{CodeRow|SATA-DNTJ|Rings worth 3 (player 1).}}
{{CodeRow|SATA-DTTJ|Rings worth 4 (player 1).}}
{{CodeRow|SATA-DYTJ|Rings worth 5 (player 1).}}
{{CodeRow|SATA-D2TJ|Rings worth 6 (player 1).}}
{{CodeRow|SATA-D6TJ|Rings worth 7 (player 1).}}
{{CodeRow|SATA-DATJ|Rings worth 8 (player 1).}}
{{CodeRow|AE8A-AADN|Start with 1 life instead of 3 (player 1).}}
{{CodeRow|AY8A-AADN|Start with 5 lives (player 1).}}
{{CodeRow|A68A-AADN|Start with 7 lives (player 1).}}
{{CodeRow|BE8A-AADN|Start with 9 lives (player 1).}}
{{CodeRow|DE8A-AADN|Start with 25 lives (player 1).}}
{{CodeRow|GJ8A-AADN|Start with 50 lives (player 1).}}
{{CodeRow|KN8A-AADN|Start with 75 lives (player 1).}}
{{CodeRow|NN8A-AADN|Start with 99 lives (player 1).}}
{{CodeRow|JW3A-CA4Y|Infinite lives (player 1).}}
{{CodeRow|SATA-DJW8|Rings worth 2 (player 2).}}
{{CodeRow|SATA-DNW8|Rings worth 3 (player 2).}}
{{CodeRow|SATA-DTW8|Rings worth 4 (player 2).}}
{{CodeRow|SATA-DYW8|Rings worth 5 (player 2).}}
{{CodeRow|SATA-D2W8|Rings worth 6 (player 2).}}
{{CodeRow|SATA-D6W8|Rings worth 7 (player 2).}}
{{CodeRow|SATA-DAW8|Rings worth 8 (player 2).}}
{{CodeRow|AE8A-AADW|Start with 1 life instead of 3 (player 2).}}
{{CodeRow|AY8A-AADW|Start with 5 lives (player 2).}}
{{CodeRow|A68A-AADW|Start with 7 lives (player 2).}}
{{CodeRow|BE8A-AADW|Start with 9 lives (player 2).}}
{{CodeRow|DE8A-AADW|Start with 25 lives (player 2).}}
{{CodeRow|GJ8A-AADW|Start with 50 lives (player 2).}}
{{CodeRow|KN8A-AADW|Start with 75 lives (player 2).}}
{{CodeRow|NN8A-AADW|Start with 99 lives (player 2).}}
{{CodeRow|JXGA-CA7W|Infinite lives (player 2).}}
{{CodeRow|KBVT-CAE2|Jump lower.}}
{{CodeRow|FVVT-CAE2|Jump a little higher.}}
{{CodeRow|EBVT-CAE2|Jump a lot higher (Switch off if you get stuck somewhere or want to go in the water).}}
{{CodeRow|CBVT-CAE2|Jump really high (Switch off if you get stuck somewhere or want to go in the water).}}
{{CodeRow|A02T-CAGL|[[Sonic]] stays invincible for a shorter time after getting hit.}}
{{CodeRow|982T-CAGL|Sonic stays invincible for a longer time after getting hit.}}
{{CodeRow|ALTA-CA82|Sonic becomes invisible and invincible for the rest of the level after getting hit.}}
{{CodeRow|ALTA-CA9Y|Once invincible [stars], Sonic stays Invincible for the rest of the level.}}
{{CodeRow|ATTT-CA58|Sonic doesn't lose rings when hit.}}
{{CodeRow|ATTT-CA6W |Tails doesn't lose rings when hit.}}
{{CodeRow|ATTT-CA6W|Only 1 ring needed instead of 50 to enter special stage.}}
{{CodeRow|SBJA-HJV2|Rings worth 2 in special stages (Sonic only/Doesn't show on screen).}}
{{CodeRow|SBJA-HNV2|Rings worth 3 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HTV2|Rings worth 4 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HYV2|Rings worth 5 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-H2V2|Rings worth 6 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-H6V2|Rings worth 7 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HAV2|Rings worth 8 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HJV8|Rings worth 2 in special stage (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HNV8|Rings worth 3 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HTV8|Rings worth 4 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HYV8|Rings worth 5 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-H2V8|Rings worth 6 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-H6V8|Rings worth 7 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HAV8|Rings worth 8 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|ACZT-CACN|Need 0 chaos emeralds to become [[Super Sonic]] (Don't grab more than needed).}}
{{CodeRow|AGZT-CACN|Need 1 Chaos Emerald to become Super Sonic (Don't grab more than needed).	}}
{{CodeRow|ALZT-CACN|Need 2 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|ARZT-CACN|Need 3 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|AWZT-CACN|Need 4 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|A0ZT-CACN|Need 5 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|A4ZT-CACN|Need 6 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|AGZT-CACY + K4ZT-CA92|Need 1 ring to become Super Sonic, don't lose rings with time.}}
{{CodeRow|A0ZT-CACY |Need 5 rings to become Super Sonic.}}
{{CodeRow|BLZT-CACY |Need 10 rings to become Super Sonic.}}
{{CodeRow|DGZT-CACY|Need 25 rings to become Super Sonic.}}
{{CodeRow|FCZT-CACY|Need 40 rings to become Super Sonic.}}
{{CodeRow|K4ZT-CA92|Super Sonic doesn't lose rings with time.}}
{{CodeRow|RE8A-A60G|Level select menu enabled.}}
{{CodeRow|2VAT-BCRA|Start most levels with some rings (1 player game only).}}
}}

==== Official codes (REV01)====
{{CodeTable|official=yes|
{{CodeRow|SAST-DJ1A|Rings worth 2 (player 1). 	}}
{{CodeRow|SAST-DN1A|Rings worth 3 (player 1).}}
{{CodeRow|SAST-DT1A|Rings worth 4 (player 1).}}
{{CodeRow|SAST-DY1A|Rings worth 5 (player 1).}}
{{CodeRow|SAST-D21A|Rings worth 6 (player 1).}}
{{CodeRow|SAST-D61A|Rings worth 7 (player 1).}}
{{CodeRow|SAST-DA1A|Rings worth 8 (player 1).}}
{{CodeRow|AE8A-AAD2|Start with 1 life instead of 3 (player 1).}}
{{CodeRow|AY8A-AAD2|Start with 5 lives (player 1).}}
{{CodeRow|A68A-AAD2|Start with 7 lives (player 1).}}
{{CodeRow|BE8A-AAD2|Start with 9 lives (player 1).}}
{{CodeRow|DE8A-AAD2|Start with 25 lives (player 1).}}
{{CodeRow|GJ8A-AAD2 |Start with 50 lives (player 1).}}
{{CodeRow|KN8A-AAD2|Start with 75 lives (player 1).}}
{{CodeRow|NN8A-AAD2|Start with 99 lives (player 1).}}
{{CodeRow|JW3A-CA4J|Infinite lives (player 1).}}
{{CodeRow|SATA-DJVW|Rings worth 2 (player 2).}}
{{CodeRow|SATA-DNVW|Rings worth 3 (player 2).}}
{{CodeRow|SATA-DTVW|Rings worth 4 (player 2).}}
{{CodeRow|SATA-DYVW|Rings worth 5 (player 2).}}
{{CodeRow|SATA-D2VW|Rings worth 6 (player 2).}}
{{CodeRow|SATA-D6VW|Rings worth 7 (player 2).}}
{{CodeRow|SATA-DAVW|Rings worth 8 (player 2).}}
{{CodeRow|AE8A-AAD8|Start with 1 life instead of 3 (player 2).}}
{{CodeRow|AY8A-AAD8|Start with 5 lives (player 2).}}
{{CodeRow|A68A-AAD8|Start with 7 lives (player 2).}}
{{CodeRow|BE8A-AAD8|Start with 9 lives (player 2).}}
{{CodeRow|DE8A-AAD8|Start with 25 lives (player 2).}}
{{CodeRow|GJ8A-AAD8|Start with 50 lives (player 2).}}
{{CodeRow|KN8A-AAD8|Start with 75 lives (player 2).}}
{{CodeRow|NN8A-AAD8|Start with 99 lives (player 2).}}
{{CodeRow|JXGA-CA7G|Infinite lives (player 2).}}
{{CodeRow|KBVT-CAE2|Jump lower.}}
{{CodeRow|FVVT-CAE2|Jump a little higher.}}
{{CodeRow|EBVT-CAE2|Jump a lot higher (Switch off if you get stuck somewhere or want to go in the water).}}
{{CodeRow|CBVT-CAE2|Jump really high (Switch off if you get stuck somewhere or want to go in the water).	}}
{{CodeRow|A02T-CAF8|Sonic stays invincible for a shorter time after getting hit.}}
{{CodeRow|982T-CAF8|Sonic stays invincible for a longer time after getting hit.}}
{{CodeRow|ALTA-CA8N|Sonic becomes invisible and invincible for the rest of the level after getting hit. }}
{{CodeRow|ALTA-CA9J|Once invincible [stars], Sonic stays Invincible for the rest of the level.}}
{{CodeRow|ATTT-CA4W|Sonic doesn't lose rings when hit.}}
{{CodeRow|ATTT-CA5G|Tails doesn't lose rings when hit.}}
{{CodeRow|AH2T-CAH6|Only 1 ring needed instead of 50 to enter special stage.}}
{{CodeRow|SBJA-HJWJ|Rings worth 2 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HNWJ|Rings worth 3 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HTWJ|Rings worth 4 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HYWJ|Rings worth 5 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-H2WJ|Rings worth 6 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-H6WJ|Rings worth 7 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HAWJ|Rings worth 8 in special stages (Sonic only/Doesn't show on screen). }}
{{CodeRow|SBJA-HJWR|Rings worth 2 in special stage (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HNWR|Rings worth 3 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HTWR|Rings worth 4 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HYWR|Rings worth 5 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-H2WR|Rings worth 6 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-H6WR|Rings worth 7 in special stages (Tails only/Doesn't show on screen). }}
{{CodeRow|SBJA-HAWR|Rings worth 8 in special stages (Tails only/Doesn't show on screen).}}
{{CodeRow|ACZT-CACA|Need 0 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|AGZT-CACA |Need 1 Chaos Emerald to become Super Sonic (Don't grab more than needed).	}}
{{CodeRow|ALZT-CACA |Need 2 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|ARZT-CACA |Need 3 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|AWZT-CACA |Need 4 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|A0ZT-CACA |Need 5 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|A4ZT-CACA |Need 6 chaos emeralds to become Super Sonic (Don't grab more than needed).}}
{{CodeRow|AGZT-CACJ + K4ZT-CA9N|Need 1 ring to become Super Sonic, don't lose rings with time.}}
{{CodeRow|A0ZT-CACJ|Need 5 rings to become Super Sonic.}}
{{CodeRow|BLZT-CACJ|Need 10 rings to become Super Sonic.}}
{{CodeRow|DGZT-CACJ|Need 25 rings to become Super Sonic.}}
{{CodeRow|FCZT-CACJ|Need 40 rings to become Super Sonic.}}
{{CodeRow|K4ZT-CA9N|Super Sonic doesn't lose rings with time.}}
{{CodeRow|RE8A-A60W|Level select menu enabled.}}
{{CodeRow|2VAT-BCRN|Start most levels with some rings (1 player game only).}}
{{CodeRow|GJ8A-AA4G|Skip straight to the ending sequence.}}
}}

==== Unofficial codes (REV00)====
{{CodeTable|
{{CodeRow|ADFT-8AF6|Regular level music plays when turning into Super Sonic.}}
{{CodeRow|ACLA-ATDR |Access [[Hidden Palace Zone]] by selecting [[Death Egg]] on the Level Select menu (no solid floors, glitched graphics, etc).}}
}}

==== Unofficial codes (REV01)====
{{CodeTable|
{{CodeRow|ACZT-CACA|Become Super Sonic With 0 Emeralds.}}
{{CodeRow|ADFT-8AF6|Regular level music plays when turning into Super Sonic.}}
{{CodeRow|982T-C9F8|Keep flashing after hit/Invincible (If you have rings).}}
{{CodeRow|ACLA-ATD4|Access Hidden Palace Zone by selecting Death Egg on the Level Select menu (no solid floors, glitched graphics, etc).}}
{{CodeRow|ACLA-AECY|Access [[Wood Zone]] by selecting [[Emerald Hill Zone]] on the Stage Select screen. (Buggy, pallete-swapped Emerald Hill Zone).}}
}}

===[[Action Replay (Mega Drive)|Action Replay]]===
Due to the fact that Pro Action Replay Effects RAM and that RAM is the same regardless of the game revision there is no need for version specific codes. These codes should work in all versions.
====Unofficial codes====
{{CodeTable|
{{CodeRow|FFFE12:0009|Infinite Lives.}}
{{CodeRow|FFFE20:00C8|Infinite Rings.}}
{{CodeRow|FFB030:00FF|Invincibility For Sonic ([[Enemies]] Can't Touch You/Can't collect Rings).}}
{{CodeRow|FFB06A:01|Invincibility For Tails (Always Have Shield).}}
{{CodeRow|FFB070:00FF|Invincibility For Tails (Enemies Can't Touch You).}}
{{CodeRow|FFB028:FA|Infinite Time Underwater For Sonic.}}
{{CodeRow|FFB068:FA|Infinite Time Underwater For Tails.}}
{{CodeRow|FFF761:6410|Sonic has Super Speed.}}
{{CodeRow|FFFEC1:6410|Tails has Super Speed.}}
{{CodeRow|FFFFB1:07|Enable Super Sonic (All [[Chaos Emeralds]] Collected).}}
{{CodeRow|FFB02B:01|Always have Shield.}}
{{CodeRow|FFFE19:01|Play As Super Sonic (No Powers).}}
{{CodeRow|FFF711:??|HUD Display Modifier (00: Off, 01: On).}}
{{CodeRow|FFFFFA:0100|Enable Debug Mode.}}
{{CodeRow|FFFFD0:0100|Enable Stage Select ({{A}}+{{start}} on Title Screen).}}
{{CodeRow|FFFE10:XXYY|Stage/Act Modifier (XX: Zone, YY: Level).
*00 - Emerald Hill
*04 - Metropolis
*05 - Metropolis 3
*06 - Wing Fortress
*07 - Hill Top
*08 - Hidden Palace (!)
*0A - Oil Ocean
*0B - Mystic Cave
*0C - Casino Night
*0D - Chemical Plant
*0E - Death Egg
*0F - Aquatic Ruin
*10 - Sky Chase}}
{{CodeRow|FFB461:01|Defeat Final Stage Bosses With 1 Hit.}}
{{CodeRow|FFB521:01|Defeat Stage 1 Robotnik With 1 Hit.}}
{{CodeRow|FFB621:01|Defeat Stage 2 Robotnik With 1 Hit.}}
{{CodeRow|FFB721:01|Defeat Stage 3 Robotnik With 1 Hit.}}
{{CodeRow|FFB821:01|Defeat Stage 4 Robotnik With 1 Hit.}}
{{CodeRow|FFB921:01|Defeat Stage 5 Robotnik With 1 Hit.}}
{{CodeRow|FFBA21:01|Defeat Stage 6 Robotnik With 1 Hit.}}
{{CodeRow|FFBB21:01|Defeat Stage 7 Robotnik With 1 Hit.}}
{{CodeRow|FFBC21:01|Defeat Stage 8 Robotnik With 1 Hit.}}
}}

==== Unofficial codes (user found)====
{{CodeTable|
{{CodeRow|FFFE12:999D|Start wing fortress(Not sure about others) with 53(i guess) lives. Super Sonic mode Presents.}}
{{CodeRow|016398:0100|Very short jump height.}}
{{CodeRow|FFB03A:11C0|Sonic Generations spindash (partially breaks the game, dying softlocks the game)}}
{{CodeRow|004476:00XX|Player slot ID (When playing as Sonic & Tails). XX is the ID (Example: 004476:0025 changes Sonic to a ring).}}
{{CodeRow|00449A:00XX|Sidekick slot ID (When playing as Sonic & Tails). XX is the ID.}}
{{CodeRow|FFF600:00YY|Game Mode Modifier (YY: Mode).
*00 - SEGA Screen
*04 - Title Screen
*08 - Demo
*0C - Level
*10 - Special Stage
*14 - Continue Screen
*18 - 2P Results Screen
*1C - 2P Level Select Screen
*20 - Ending Scene/Credits
*24 - Options Menu
*28 - Level Select Screen
*8C - Pre-Level}}
}}

If you want to make your own codes, see [[SCHG:Sonic 2/RAM Editing|here]]. The format to edit those RAM values with PAR codes is this: FFXXXX:YY FF is FF, XXXX is the position of the data in RAM in four hexadecimal digits and YY is the value you want to put in in two or four hexadecimal digits. Remamber to convert your decimal value to [[sega:Hexadecimal|hexadecimal]] first. For 2 Byte/16 bit values, put four digits in YY. If you need to enter values with four Bytes, you have to split it into two 2 Byte codes.

==References==
<references/>

{{S2MDOmni}}