Genesis Sonic & Knuckles

0053D6:0063		Start with 99 lives
		Tested by gedowski and shadowstalker
0063BC:6002 02D81A:6002		Keep rings between levels
		Tested by Teddygrahams and X977
00984E:000A		Rings worth 10 in special stage
		Tested by gedowski and X977
009E94:4E71		Only one blue sphere needed for emerald (or BIG emerald)
		Tested by thunderbolt joe and X977
00DD80:603C		Infinite Time
		Tested by frde and X977
0102DC:00FF 0196B6:00FF		Keep shields (fire, water, lightning) when hit
		Tested by frde and gedowski
011602:1000		Spin Dash Goes Nowhere, You Just Roll In Place.
		Tested by X977 and Zonor
011816:07D0		High jump for Sonic
		Tested by gedowski and X977
011816:09C0		Super jump for Sonic
		Tested by gedowski and X977
011816:0D00		Mega jump for Sonic
		Tested by frde and gedowski
011816:1A00		Orbital jump for Sonic
		Tested by gedowski and X977
01193C:4E71		Sonic can always use Fireball Spin Dash (can't double jump, bounce, or become Super Sonic)
		Tested by gedowski and X977
011980:4E71		Sonic can always double jump (can't use water shield or become Super Sonic)
		Tested by gedowski and X977
0119D4:0000 011A3E:0000		Become Super-Duper Sonic without any emeralds (you still need 50 rings unless using one of the above codes)
		Tested by cj and frde
011B36:1C90		TURBO!!!!!!
		Tested by MAC-10 and X977
011B76:6064		Don't use rings when any characters are hyper (or super-hyper)
		Tested by dark_star and Zonor
01271A:0000		HAPPY FEET!!
		Tested by The Ultimate Cheater and X977
01774E:0C00		Mega jump for Knuckles
		Tested by frde and gedowski
01774E:1800		Orbital jump for Knuckles
		Tested by gedowski and smashwzhre
01784A:0000 0178EE:0000		Become Super-Duper Knuckles without any emeralds (you still need 50 rings unless using one of the above codes)
		Tested by King of Codes and shadowstalker
01850E:6000		Can't drown
		Tested by gedowski and X977
01A760:0004		IT RAINS RINGS WHEN HIT!
		Tested by smashwzhre and X977
00140A:0000		Time still goes when paused.
		Tested by smashwzhre and Teddygrahams
00345E:6004		Deadly warpspots!
003B1C:00A8		Blue/Black
		Tested by Jeric and smashwzhre
003B1E:0098		Silver Sonic/Multicolored Backgrounds And Characters
		Tested by BlAdErX10 and smashwzhre
003B1E:00A0		Pink Sonic/Multicolored Levels And Characters
		Tested by Allan and X977
003B1E:00A8		Blue Knuckles/Black Background
		Tested by frde and X977
003B9A:0098		Super-Black Characters Whith White Eyes!!!!!!
		Tested by X977 and Zonor
003B9E:4098		Noob Saibot Characters
		Tested by MAC-10 and X977

Other codes

To get level select and debug on S&K
	Go to Angel Island Zone, jump and hang on a swinging vine. Then press Left, Left, Left, Right, Right, Right, Up, Up, Up. You should hear a ring sound. If not try again. After doing code, pause and press A.The game will reset. At the title screen, go down on the title options until you get to the Sound Test option. Select it. You will appear at the Stage Select Option. Go into Mushroom Hill. Keep on playing as usual until you get to the pulley-like machines(you press down on them to go up). Do the same code hear as you did with the swinging vines. Pause and press A. To activate, when you are about to select a stage, Hold A and press start. When you are playing with debug, A=reverses gravity/changes item B=change/back to normal C=jump/put item
	Submitted by da best gamer Tested by MAC-10 and ssj4fred
Hidden Level Select
	Start a game of Sonic & Knuckles. Choose Sonic. On the 1st level, find the 'pressure pumps' (the ones with 2 handles, you have to press down to get them to work). Hold onto the handles and press: Left, Left, Left, Right, Right, Right, Up, Up, Up. You should hear a noise if you did it right. If you don't hear a noise, try again on a different one. Pause the game and press A. The game will reset to the title screen. At the point where you choose your character, hold A and press Start.Sonic and Knuckles Other codes See Sonic do the stunts   Enable debug mode and press B+C to see sonic do "the stunts"

Genesis Sonic 3D Blast

0004340002		Non-Stop Demo Mode
		Tested by MAC-10 and X977
0014460002		Animation freezer
		Tested by dark_star and X977
0018386002		At level start you get a level select menu every time
		Tested by Darwin and woohooExDeath
0018504002		Invisible Sonic (all that you can see is his shadow)
		Tested by gigacheater and MAC-10

0DC2506004		Infinite Lives
		Submitted by Robbie Lude Tested by gedowski and trent
0D3EEE000F 0D3F00000F		Get extra man about every 1,000,000 pts.
0D3EEE004C 0D3F00004C		Get extra man about every 5,000,000 pts.
0D3EEE0098 0D3F000098		Get extra man about every 10,000,000 pts.
0D3EEE01CA 0D3F0001CA		Get extra man about every 30,000,000 pts.
0D3EEE02FB 0D3F0002FB		Get extra man about every 50,000,000 pts.
0D43A67601		Start on Level 2: Lava Powerhouse
0D43A67602		Start on Level 3: The Machine
0D43A67603		Start on level 4:Showdown
		Tested by gedowski, MegaSilverPROTO and vegetto1
0D43EE0001		Start with 1 life
0D43EE0002		Start with 2 lives
0D43EE0005		Start with 5 lives
0D43EE0007		Start with 7 lives
0FA6C60000		1 ball in Level 2 bonus round
0FA6C60001		2 balls in Level 2 bonus round
0FA6C60004		5 balls in Level 2 bonus round
0FA6C60009		10 balls in Level 2 bonus round
0FA6FC0000		1 ball in Level 1 bonus round
0FA6FC0001		2 balls in Level 1 bonus round
0FA6FC0004		5 balls in Level 1 bonus round
0FA6FC0009		10 balls in Level 1 bonus round
0FA7180000		1 ball in Level 3 bonus round
0FA7180001		2 balls in Level 3 bonus round
0FA7180004		5 balls in Level 3 bonus round
0FA7180009		10 balls in Level 3 bonus round

Other codes

Level Select

Before you start the game, go to Options and press A, down, b, down, c, down, a, b, up, b, c, up, a, c, up. Then you should hear a tone. If you don't, try it again. After you get the tone, leave the options. To go to level 2, press a+start while highlighting Start. To go to level 3, do the same thing as level 2 except use b+start. To go to level 4, do the same thing only with c+start. Level 2: The Powerhouse, Level 3: The Machine, Level 4: You figure it out!

Genesis Sonic the Hedgehog

00334E7006		Gives you all Chaos Emeralds.
		Submitted by Gadgets Tested by GAMELORD and jarodgers
0003386004		Master Code
00154A0001		Entire level glitched
0016720001		Glitched coins, etc.
0017361401		Secret code - scenery glitched, but all hidden items and breakable walls visible
0032466002		Level select menu
0033440005		Disembodied Sonic at title
0033466001		Start at title resets to "Sonic Team Presents..."
00334A0001		Start with 1 life
00334A0005		Start with 5 lives
00334E7005		Start with 5 chaos emeralds
009C665478		Delayed and repeated ring sparkle when collected
009C6A5478		Touching ring freezes it
009C6E5478		Rings don't sparkle when collected
009C725478		Collect a ring, and your total won't stop rising
009C745478		When you collect rings, they are replaced by solid ones you can stand on
		Tested by emumaxi and GAMELORD
009C765078		Each ring counts as 8
009C765478		Each ring counts as 2
009C765678		Each ring counts as 3
009C765878		Each ring counts as 4
009C765A78		Each ring counts as 5
009C765C78		Each ring counts as 6
009C765E78		Each ring counts as 7
009C785478		Maximum rings collected except from monitors is 10
009C7A5478		Game freezes with every ring collected, press C to resume play
00D5CA0000		Zero gravity
00D5CA0006		Asteroid gravity
00D5CA0008		Jump higher
		Tested by GAMELORD and gedowski
00D5CA0018		Jump higher
		Tested by GAMELORD and gedowski
00D5CA0050		Jupiter gravity
00D5CA0060		Solar gravity
00D5CA00F8		Black hole gravity
012C2E00FF		Slow Sonic
012C3000FF		Can't move reft or right
1D000BA040		Infinite time in water...can't drown
		Submitted by Megaman Tested by Gohan_SUPERSAIYAN.2 and Hyper Shadow
012C340001		Sonic is slow to reach full speed
012C3A0000		No brakes
012D200001		When invincibility runs out, some items disappear, and some (like 1ups) reappear
012D240001		Once invincible, stay invincible for the rest of stage
012D2C0001		Jump immediately when round starts to avoid glitch. Fast music, round sometimes restarts, error messages, and more.
012D380001		Running shoes have no immediate effect, but they increase your max run speed for the rest of the round.
0133260001		Can't quite reach level end
0133280001		Warp past level clear sign- collect bonus point at your leisure then turn FX off and go back for it
01332C0001		Completeing level kills you
0138706032		Says Game Over after every life, infinite lives
0138806032		Simply disappear when you die
0138886032		Trampoline under Sonic- wait after dying
01388C6032		High jump when you die
0138A06032		Infinite lives
0139340001		Stay standing in S-curve tunnels; can't run loops

Other codes

Level Select and Debug Mode

At the title screen, when Sonic comes out of the hole and waves his finger, press Up, Down, Left, Right. Or, for Debug, Press C, C, Up, Down, Left, Right. You should hear a ring sound after doing the code. If not, try again. If you heard the ring sound, hold A and press start. If you did the Stage Select code, a stage menu should appear. If debug was your code, you will start at the first stage. If you have debug on- A=Jump/Change Item B=Changes Sonic into an item/Changes Sonic back to normal C=Jump/Put Item

Genesis Sonic the Hedgehog 2

000080322F FFFE100001		Activates the hidden Palace Zone
		Tested by chrisjericho and Nick Z
011FE05038		A lot lot lot o' rings per ring
		Submitted by me Tested by smashwzhre and WoRHEd
00947A0800		In the level select menu click on Death Egg Zone and you go to Hidden Palace Zone instead.
		Submitted by Tossed Tested by Nick Z and TomGuy
00947D0800		In level select, Special Stage goes to Hidden Palace
		Submitted by Tossed Tested by Lestat and smashwzhre

Other codes

Level Select
	On the Options Screen, Play Sounds: 19, 65, 09, 17 Then Press Start. On the Title Screen, Hold A and Press Start
Activates the hidden Super Sonic game feature and gives you all 7 Chaos Emeralds.
	Activate the Stage-Select code, go to sound test, and listen to sounds 4, 1, 2, and 6. You should hear the Chaos Emerald victory chime. Collect 50 rings and jump to turn into Super Sonic. Be careful, though, because when Super Sonic's ring timer goes to 0, you become regular Sonic again!
	Submitted by Mr. Armageddon Tested by power264 and the_spork_master
Enables Debug Mode
	Enter 1, 9, 9, 2, 1, 1, 2, 4 on the Level Select Menu (Code Above). Then on select a level and Hold A + Start. To turn into an object, press B. The Change objects press A, and to place an object, press C.To exit debug press B.

Genesis Sonic the Hedgehog 3

018EF86004		Almost never lose rings
		Submitted by MegaSilver Tested by jordanw and Zonor
012ACC6002		Super Sonic doesn't lose rings
		Submitted by MegaSilver Tested by dick and omega
0132A06002		Infinite lives
		Submitted by MegaSilver Tested by Allan and Septyra
01283C0780		Bonus jump
		Submitted by MegaSilver Tested by cj and gedowski
01283C0900		Super jump
		Submitted by MegaSilver Tested by gedowski and Zonor
01283C0B00		Mega-jump
		Submitted by MegaSilver Tested by gedowski and minion_15
00B5FA0063		Start with 99 lives
		Submitted by InFo Tested by Allan and gedowski
0039624000		Level Select
		Submitted by InFo Tested by nator and ssj4fred
01813C0000		Insta-shield can be activated multiple times
		Submitted by InFo Tested by Allan and gedowski

Other codes

Level Select code
	After the Sega logo, when Sonic is about to flash through the screen, quickly press Up,Up, Down, Down, Up, Up, Up, Up. You should hear a ring chime. If not, try again. This is a very difficult code to do, just try to go with the beat. If you manage to get the code right, press down on the title screen until you highlight the Sound Test option and press start.