This is the ultimate   Below are codes that can do almost anything, If there is anyone out there who can make these codes or has any that I dont, Email me   Well known codes are in Blue (Released by galoob)   Rare codes are in orange (Made by players)
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GENESIS
Game Genie
Sonic 1
There are 2 versions of this game, find out which one you have by testing codes   Version 1 020-54A-E6E  Each ring counts as 2 030-54A-E6E  Each ring counts as 3 040-54A-E6E  Each ring counts as 4 050-54A-E6E  Each ring counts as 5 060-54A-E6E  Each ring counts as 6 070-54A-E6E  Each ring counts as 7 080-54A-E6E  Each ring counts as 8 3A0-21C-2A2 Never lose rings 003-F8C-3B7  Stop timer 013-7DE-E66 Start with 1 life 053-7DE-E66 Start with 5 lives 093-7DE-E66 Start with 9 lives 007-01A-3BE  Infinite lives   Version 2     Start at 003-8CE-5D4 + 013-88E-91A Green Hill Zone Act 2 003-8CE-5D4 + 023-88E-91A Green Hill Zone Act 3 003-8CE-5D4 + 033-88E-91A Bridge Act 1 003-8CE-5D4 + 043-88E-91A Bridge Act 2 003-8CE-5D4 + 053-88E-91A Bridge Act 3 003-8CE-5D4 + 063-88E-91A Jungle Act 1 003-8CE-5D4 + 073-88E-91A Jungle Act 2 003-8CE-5D4 + 083-88E-91A Jungle Act 3 003-8CE-5D4 + 093-88E-91A Labyrinth Act 1 003-8CE-5D4 + 0A3-88E-91A Labyrinth Act 2 003-8CE-5D4 + 0B3-88E-91A Labyrinth Act 3 003-8CE-5D4 + 0C3-88E-91A Scrap Brain Act 1 003-8CE-5D4 + 0D3-88E-91A Scrap Brain Act 2 003-8CE-5D4 + 0E3-88E-91A Scrap Brain Act 3 003-8CE-5D4 + 0F3-88E-91A Sky Base Act 1 2A2-86A-6E2  Never drown
Sonic 2
009-04F-3BE  Infinite lives A78-92C-19E  Invincible after 1 ring--except on act 3 026-5ED-E6E  Each ring worth 2 points 036-5ED-E6E  Each ring worth 3 points 046-5ED-E6E  Each ring worth 4 points 056-5ED-E6E  Each ring worth 5 points 066-5ED-E6E  Each ring worth 6 points 076-5ED-E6E  Each ring worth 7 points 086-5ED-E6E  Each ring worth 8 points 3A7-E4C-2A2 Don't lose rings when hit 012-B8D-E66 Start with 1 life 052-B8D-E66 Start with 5 lives 092-B8D-E66 Start with 9 lives 001-12D-3B7 Stop timer 3E2-E4D-3B4 + 012-E5D-E69 Start on Act 2 3E2-E4D-3B4 + 022-E5D-E69 Start on Act 3
Sonic Chaos
Don't combine codes in yellow with codes in purple 008 3BD E6E  Infinite time 022 1EC E6E  Each ring worth 2 042 1EC E6E  Each ring worth 4 062 1EC E6E  Each ring worth 6 082 1EC E6E  Each ring worth 8 0A2 1EC E6E  Each ring worth 10 3A9 DCB 2A2  Never lose rings 22A 91D 2A2  Start with some rings most of the time 016 93C E66  Sonic starts with 1 life 096 93C E66  Sonic starts with 9 lives 506 93C E66  Sonic starts with 50 lives 996 93C E66  Sonic starts with 99 lives 014 23E E66  Sonic continues with 1 life 094 23E E66  Sonic continues with 9 lives 504 23E E66  Sonic continues with 50 lives 994 23E E66  Sonic continues with 99 lives 016 99C F7E  Tails starts with 1 life 096 99C F7E  Tails starts with 9 lives 506 99C F7E  Tails starts with 50 lives 996 99C F7E  Tails starts with 99 lives 014 28E F7E  Tails continues with 1 life 094 28E F7E  Tails continues with 9 lives 504 28E F7E  Tails continues with 50 lives 994 28E F7E  Tails continues with 99 lives 3A6 24E 2A2  Infinite lives 1F6 9EC 08F + 996 A0C F7D Sonic starts on Gigapolis Zone 3D6 9EC 08F + 996 A0C F7D Sonic starts on Sleeping Egg Zone 006 9EC 08F + 996 A0C F7D Sonic starts on Mecha Green Hill Zone 3C6 9EC 08F + 996 A0C F7D Sonic starts on Aqua Planet Zone 1F6 9EC 08F + 996 A0C F7D Tails starts on Sleeping Egg Zone 3D6 9EC 08F + 996 A0C F7D Tails starts on Aqua Planet Zone 006 9EC 08F + 996 A0C F7D Tails starts on Electric Egg Zone 056 93C E66 + 006 9EC 08F + 996 A0C F7D Sonic starts on Electric Egg         Zone with 5 lives 016 99C F7E + 1F6 9EC 08F + 996 A0C F7D  Tails starts on Gigapolis Zone        with 1 life 036 99C F7E + 006 9EC 08F + 996 A0C F7D  Tails starts on Mecha Green         Hill Zone with 3 lives
Sonic Triple Trouble
Sonic Spinball
Sonic Labyrinth
Sonic Drift 2
Sonic Blast
Tails Adventure
Sonic Drift (japanese import)
Tails Skypatrol (japanese import)