Note on using Emulators: Some codes may not work correctly depending on which emulator you are using - so some codes won't work in Gens, but they work perfectly in Kega Fusion, and vice versa. Due to the sheer volume of codes on offer here, I can't provide tech support for all of these. I haven't tested them all but I'm pretty sure they're all working. You'll just have to use trial and error if you run into trouble with them.

 

 1.1   Mega Drive (Genesis) Version

 1.2   Master System Version

 1.3   Game Gear Version

Name Code Description Hacker(s)
All Bosses 1 hit kill FFB933:00   Sanchez
Infinite Time FFFB01:40   cabo-hicks
Enable level select and 7 lives in options FFFA7B:0001   cabo-hicks
Select difficulty level FFFFC7:000X XX=
00 easy
01 normal
02 hard
03 hardest
cabo-hicks
Player 1 - Infinite Continues FFFF1B:09   cabo-hicks
Player 2 - Infinite Continues FFFF1D:09   cabo-hicks
Player 1 - Infinite Lives FFFF20:09   cabo-hicks
Player 2 - Infinite Lives FFFF23:09   cabo-hicks
Player 1 - Infinite Police Calls FFFF21:01   cabo-hicks
Player 1 - No Police Calls FFFF21:00 To avoid game crashing during stage 8 cabo-hicks
Player 2 - Infinite Police Calls FFFF24:01 Set the codes value to 0 to disable Police Calls for Player 2

NOTE: Be careful with using Infinite Police Calls in stage 8 (final stage). Because when you get near the door at the end of the stage, if you call there the police, the game crashes! Make save states to avoid this problem.
cabo-hicks
Player 1 - Selected Character - Cursor Modifier FFB859:0? NOTE 1: '[Player #] Selected Character - Cursor Modifier' codes only work at the Select Player Screen. This allows you to use the same characters for both players!

NOTE 2: Disable the code or Player 2 can't move correctly!
cabo-hicks
Player 2 - Selected Character - Cursor Modifier FFB8D9:0?   cabo-hicks
Player 1 - Selected Character - Body Modifier FFB850:0? Selected Character - Body Values:
0 - Axel
1 - Adam
2 - Blaze

NOTE 1: For some weird reason this only works when you lose your first life.

NOTE 2: Avoid does nothing, simply die. I recommended use for that the time over code. Then you appear as the selected character. (When you finally have the character's body that you wanted, no more fails happens).

NOTE 3: If you move the character and he is hanging / you can't move... Then use the Police Call special attack or use the 'time over code' with this and you will regain the control of the character.
cabo-hicks
Player 2 - Selected Character - Body Modifier FFB8D0:0?   cabo-hicks
Stage Modifier FFFF03:0? Stage values:
0 - Stage 1
1 - Stage 2
2 - Stage 3
3 - Stage 4
4 - Stage 5
5 - Stage 6
6 - Stage 7
7 - Stage 8

NOTE: Disable the code before you progress to the next stage. Otherwise, you will start back at the stage you selected! 
cabo-hicks
Player 1 Can Continue / Game Over FFFF22:0? Use..
0 - For Can Continue
1 - For Game Over

Note 1: Unfortunately, this doesn't work for Stage 8...

Note 2: If you enable the Game Over code while you still have lives or continues you can continue playing as normal.
If you don't have lives or continues, you can still continue. But only with 1 life left, named: "life 0" (and not "life 1").
If you use the Infinite Continues code with this code, you won't have this problem.


Note 3: It is impossible use this for deceive the game, during one 2 players versus fight in the end of the game.
the -can continue code- not works in level 8. but you can use the -game over code-, for make the game thinks that one player are dead and lose the vs fight.
cabo-hicks

 

Player 2 Can Continue / Game Over FFFF25:0?   cabo-hicks
Music Sounds Weird FFF1BF:01   cabo-hicks
Infinite Energy AKHA-AA5R   VisitntX
Infinite Lives BA4A-AN44   VisitntX
Infinite Special RFAA-A6VR   VisitntX
Freeze Time KTGA-CR7E   VisitntX
Invincibility JGZT-BCAC   VisitntX
Control 1st Boss JW3A-B2HC Start ONE PLAYER game, beat stage 1, wait for the boss, catch him and enable this code. You can control him now! Just use 2nd joystick. (Stay close at him, and you'll catch him. Or grab, whatever.)

If you don't catch him before activating this code, he will simply disappear.
Chemist
Infinite Time M2GA-CA6W   Chemist
Activate level select in options AD8T-AN9A
AD6A-AR9R
  gedowski
Activate very easy and mania difficulties in options AD6T-AR5Y
AD6T-AR66
  gedowski
Activates 9 lives in options AX6T-AN76   gedowski
Both players start with 1 fighter instead of 3 AEMT-BA7W   Galoob
Both players start with 5 fighters AYMT-BA7W   Galoob
Both players start with 7 fighters A6MT-BA7W   Galoob
Both players start with 9 fighters BEMT-BA7W   Galoob
Player 1 starts with 3 fighters, player 2 starts with 6 fighters ANMT-BA7T
A2MT-BE7W
2EMT-BCF2
  Galoob
Player 1 starts with 3 fighters, player 2 starts with 9 fighters ANMT-BA7T
BEMT-BE7W
2EMT-BCF2
  Galoob
Player 1 starts with 6 fighters, player 2 starts with 3 fighters A2MT-BA7T
ANMT-BE7W
2EMT-BCF2
  Galoob
Player 1 starts with 9 fighters, player 2 starts with 3 fighters BEMT-BA7T
ANMT-BE7W
2EMT-BCF2
  Galoob
Infinite fighters for both players AT4A-AA48   Galoob
Infinite special attacks for both players RFAA-A6VR   Galoob
Both players continue with 1 fighter instead of 3 AFMA-BA6E   Galoob
Both players continue with 5 fighters AZMA-BA6E   Galoob
Both players continue with 7 fighters A7MA-BA6E   Galoob
Both players continue with 9 fighters BFMA-BA6E   Galoob
Infinite life on life gauge--both players AJ4T-AA34   Galoob
Regular attacks are useless ABBA-AAP4   Galoob
Start timer at 99 RGMA-C6VC
XGMA-DA3E
  Galoob
Start timer at 25 RGMA-C6VC
E0MA-DA3E
  Galoob
Invincibility AJRA-AA6C   gsaurus
Turn friendly collision off AJRA-AA6L   gsaurus
Killer normal attacks AJ4A-AA6J   gsaurus
Killer knocking down attacks AJ4A-AA80   gsaurus
Enable same character select A2NT-AA5G   gsaurus
Remove character select colour ATNT-AA7N little visual aid for same char select gsaurus
Psychedelic mode AJEA-CA8A   gsaurus
Multi player enemies on single player REGA-A61R   gsaurus
Two bosses on single player A2DT-AA72   gsaurus
Single player enemies on multi player RAGA-AA9R   gsaurus
One boss on multi player REDT-A6Z2   gsaurus
End level AH7S-8ADW   gsaurus
Allow you to scroll back RGJA-C6YR cop call doesn't work well gsaurus
Allow you to scroll freely through the level BWJA-CA6R cop call doesn't work well gsaurus
Disable turn around while attacking RY6T-A6Y4   gsaurus
9 Lives in lives select AYLA-AABN
ATLA-BA3E
  gsaurus
Instant activation within the same group of enemies HTDT-BARA
AEDT-AAGC
  gsaurus
Activate enemies that are waiting at distance RGMT-A61R
RGMT-A61G
  gsaurus
Axel physics 3670-XXXX Each word is the physics of an animation frame, in the format XXYY, being respectively x and y velocity, signed bytes.

Example: Fast Axel, combine those:
3676:6000 - walk forward: 60 horizontal speed
3678:40C0 - diagonal up: 40 horizontal, -40 vertical
367A:00B0 - up: -50 vertical
367C:4040 - diagonal down: 40 horizontal, 40 vertical
367E:0050 - down: 50 vertical

gsaurus
Adam physics 3706-XXXX   gsaurus
Blaze physics 379C-XXXX   gsaurus
Axel Jump 3842-XXXX Jump speed (lower values make higher jumps). Long words

Example: Axel high jump at 3842: FFF44000

gsaurus
Adam Jump 3846-XXXX   gsaurus
Blaze Jump 384A-XXXX   gsaurus
Score needed for extra lives. Long words. 04EC to 4E10   gsaurus
Almighty Galsia's gang FJCA-ARCR   gsaurus
Can move during cop call AFAA-AACR   gsaurus
Skip police car scene during cop call AWKA-CA9R You only see the ammunitions raining over enemies. gsaurus
Garcia gets really angry if you hit him 9B46:0016 Combine with these codes: E190:4ef9, E192:0000 and E194:9B36 gsaurus
Garcia doesn't go around you DD8E:DDCA   gsaurus
Vertical speed of enemies when they go around you. DC1C:XXXX Example: DC1C:0008 (Garcia move up/down faster) gsaurus
Enemy horizontal speed when walking around you. DD68 to DD76 Example:
DD68:0480 DD6A:0501 DD6C:0600 DD6E:0701 DD70:0800 DD72:0701 DD74:0600 DD76:0801 (I'm not sure what each value is, but it works, Garcia walks faster)
gsaurus
Replace enemies 0CE2:303C
0CE4:00XX
0CE6:6008

04 lights?
06 shadow?
08 knife
09 bottle
0a bats
0b pipe
0c pepper
0d gun quake
0e gun sound
0f game over
...
17 rain
18 tires
19 drums
1a trap
1b road cone
1c bridge light thing
1d container
1f container
...
20 galsia with knife
21 galsia 1 (easy)
22 galsia 2 (hard)
23 galsia with pipe
24 signal
25 hakuyo 1 (easy)
26 electra
27 clown 1
2a hakuyo 2 (hard)
...
31 ?
32 walking cereal?
34 ?
36 machinegun sound
...
3e press start
3F money
40 gold
41 container
42 factory hammer
46 Mr.X entrance door sound
48 Go
4C extra life
4E ?
54 garage door
55 clawman
56 boomerang guy
57 bongo
58 mona/lisa

gsaurus
Black background on some stages ACPA-CABJ
 
  silentkiller
Picking up Police Car/1UP increases 9 Police Car/Lives BEGT-CAG6   silentkiller
Picking up Police Car/1UP increases 144 Police Car/Lives WAGT-CAG6   silentkiller
Police Car / 1UP increases 153 Police Car & Lives XEGT-CAG6 Note: you need to change the police car/ lives to 0 using par codes silentkiller
Gold Bar worths 999999 points XEHA-CAAC
XEHA-DXAE
  silentkiller
Money Bag worths 999999 points XEHA-CAAW
XEHA-DXAY
  silentkiller
Garica #1 worths 999999 points XEGT-CAHG
XEGT-DXHJ
  silentkiller
Signal/Nora/Garcia #2 worths 999999 points XEGT-CAHL
XEGT-DXHN
  silentkiller
Hakuyo#1 worths 999999 points XEGT-CAHR
XEGT-DXHT
  silentkiller
Jack/Hakuyo#2 worths 999999 points XEHA-CAA8
XEHA-DXBA
  silentkiller
Mr X worths 999999 points XEHA-CAAG
XEHA-DXAJ
  silentkiller
Abadede worths 999999 points XEHA-CABY
XEHA-DXB0
  silentkiller
Souther worths 999999 points XEHA-CAB0
XEHA-DXB2
  silentkiller
Antonio worths 999999 points XEHA-CAA0
XEHA-DXA2
  silentkiller
Bongo Worths 999999 points XEBT-CAHL
XEBT-DXHN
  silentkiller
Mona/Lisa worths 999999 points XEHA-CAB8
XEHA-DXCA
  silentkiller
Allows you to progress the stage HCHT-CAME   silentkiller
Prevents you to progress the stage ACHT-CADE   silentkiller
Souther & Antonio start with 0 hp AB9T-CABL If you play hardest mode with 0 hp codes, the bosses will start with 5 hp. silentkiller
Souther & Antonio start with 255 hp 979T-D93L   silentkiller
Bongo & onihime/Yasha start with 0 hp AB9T-CABN   silentkiller
Bongo & onihime/Yasha start with 255 hp 979T-D93N   silentkiller
Knife-Wielding Galsia (Blue) deals 0 damage AB1T-E0GT   silentkiller
Knife-Wielding Galsia (Blue) deals 255 damage 971T-E0GT   silentkiller
Knife-Wielding Galsia (Green) & Knife-Wielding Galsia (Red) deal 0 damage AB1T-EAGW   silentkiller
Knife-Wielding Galsia (Green) & Knife-Wielding Galsia (Red) deal 255 damage 971T-F98W   silentkiller
Rookie Galsia (Blue) deals 0 damage AB1T-EWG0   silentkiller
Rookie Galsia (Blue) deals 255 damage 971T-EWG0   silentkiller
Rookie Galsia (Green) & Rookie Galsia (Red) deals 0 damage AB1T-EAG2   silentkiller
Rookie Galsia (Green) & Rookie Galsia (Red) deals 255 damage 971T-F982   silentkiller
Veteran Galsia (Blue) deals 0 damage AB1T-EWG6   silentkiller
Veteran Galsia (Blue) deals 255 damage 971T-EWG6   silentkiller
Veteran Galsia (Green) & Veteran Galsia (Red) deals 0 damage AB1T-EAG8   silentkiller
Veteran Galsia (Green) & Veteran Galsia (Red) deals 255 damage 971T-F988   silentkiller
Baseball Bat/Pipe-Wielding Galsia (Blue) deals 0 damage AB1T-E0HC   silentkiller
Baseball Bat/Pipe-Wielding Galsia (Blue) deals 255 damage 971T-E0HC   silentkiller
Baseball Bat/Pipe-Wielding Galsia (Green) & Baseball Bat/Pipe-Wielding Galsia (Red) deal 0 damage AB1T-EAHE   silentkiller
Baseball Bat/Pipe-Wielding Galsia (Green) & Baseball Bat/Pipe-Wielding Galsia (Red) deal 255 damage 971T-F99E   silentkiller
Signal (Yellow) deals 0 damage AB1T-EWHJ   silentkiller
Signal (Yellow) deals 255 damage 971T-EWHJ   silentkiller
Signal (Purple) & Signal (Green) deal 0 damage AB1T-EAHL   silentkiller
Signal (Purple) & Signal (Green) deal 255 damage 971T-F99L   silentkiller
Hakuyo (Grey) deals 0 damage AB1T-EWHR   silentkiller
Hakuyo (Grey) deals 255 damage 971T-EWHR   silentkiller
Hakuyo (Brown) & Hakuyo (Black/Red) deals 0 damage AB1T-EAHT   silentkiller
Hakuyo (Brown) & Hakuyo (Black/Red) deals 255 damage 971T-F99T   silentkiller
Nora (Red) deals 0 damage AB1T-E6HY   silentkiller
Nora (Red) deals 255 damage 971T-E6HY   silentkiller
Nora (Black) & Nora (Grey) deal 0 damage AB1T-EAH0   silentkiller
Nora (Black) & Nora (Grey) deal 255 damage 971T-F990   silentkiller
Flame-Torch Jack (Red) deals 0 damage AB1T-FCH4   silentkiller
Flame-Torch Jack (Red) deals 255 damage 971T-FCH4   silentkiller
Flame-Torch Jack (Black) & Flame-Torch Jack (Grey) deal 0 damage AB1T-EAH6   silentkiller
Flame-Torch Jack (Black) & Flame-Torch Jack (Grey) deal 255 damage 971T-F996   silentkiller
Axe-Wielding Jack (Red) deals 0 damage AB2A-EAAA   silentkiller
Axe-Wielding Jack (Red) deals 255 damage 972A-EAAA   silentkiller
Axe-Wielding Jack (Black) & Axe-Wielding Jack (Grey) deal 0 damage AB2A-EAAC   silentkiller
Axe-Wielding Jack (Black) & Axe-Wielding Jack (Grey) deal 255 damage 972A-F92C   silentkiller
Antonio starts with 0 HP 0V0T-DEBJ
016D28:12B4
1st Code is Game Genie format
2nd code is Raw Format (Rom address)
silentkiller
Souther starts with 0 HP DKSA-CCRC
015EC2:211A
  silentkiller
Abedede starts with 0 HP F3CT-CCB6
01453C:012E
  silentkiller
Bongo starts with 0 HP 0V4T-DEBJ
017528:12B4
  silentkiller
Onihime & Yasha starts with 0 HP ZBNT-CNKY
015934:26A8
  silentkiller
Mr X starts with 0 HP LJ9A-CCDL
013E6A:0152
  silentkiller

Name Code Description Hacker(s)
Score Modifier 00C0-10??
00C0-11??
Replace ?? with anything from 00-FF. drgonzo7
Game Speed Modifier 00C0-0B01 The game runs very quickly with this code on. drgonzo7
Enemy Damage Modifier 00C0-1B?? 00 -1 hit kills you
0F - massive damage
FF - normal damage
drgonzo7
Infinite Time 00C3-4909
00C3-4A09
  drgonzo7

Name Code Description Hacker(s)
Infinite Energy 00CC-F317   Datel
Send Opponents 'Flying' 00CF-98FB   Datel
Infinite Timer 00CE-EE01   Datel
Level Select [0-4] 00C6-670? Switch action replay off at end of level. Datel
Start with 2 lives 027-3CF-E66   Galoob
Start with 5 lives 057-3CF-E66   Galoob
Start with 8 lives 087-3CF-E66   Galoob
Infinite time 3A9-667-2A2   Galoob
Start with 90 seconds instead of 40 in Round 1 090-6E7-F7A   Galoob
Start with 20 seconds in Round 1 020-6E7-F7A   Galoob
Start with 90 seconds instead of 50 in Rounds 2 thru 4 090-737-F7E   Galoob
Start with 20 seconds in Rounds 2 thru 4 020-737-F7E   Galoob
Start with 90 seconds instead of 50 in Round 5 090-787-F7E   Galoob
Start with 20 seconds in Round 5 020-787-F7E   Galoob
Infinite lives 008-DD6-19E   Galoob
Infinite energy 009-0A6-3B7   Galoob
Start with 2 lives 027-3CF-E66   Galoob
Start with 5 lives 057-3CF-E66   Galoob
Start with 8 lives--ignore counter 087-3CF-E66   Galoob
Start on Round 2 677-CC9-913   Galoob
Start on Round 3 677-CC9-913
027-CA9-E6E
  Galoob
Start on Round 4 677-CC9-913
037-CA9-E6E
  Galoob
Start on Round 5 677-CC9-913 
047-CA9-E6E
  Galoob

 

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