Mortal Kombat 4
At the difficulty selection screen, press Up to obtain up to five credits.
Enter one of the following codes before a match begins:
| Character | |
| Dragon | |
| MK Logo | |
| Ying-Yang | |
| Four | |
| Question Mark | |
| Lightning Bolt | |
| Goro | |
| Raiden | |
| Shao Kahn | |
| Skull |
| Result | |
| Play as Reptile | |
| Fight against Reptile | |
| Disable throws | |
| Swicharoo | |
| Dark Kombat | |
| Silent Kombat | |
| Randper Kombat | |
| Psycho Kombat | |
| Explosive Kombat | |
| No blocking | |
| Programmer's message | |
| Programmer's message | |
| Player 1 25% health | |
| Player 1 50% health | |
| CPU 25% health | |
| CPU 50% health | |
| One-hit death | |
| Noob Saibot mode | |
| Weapons never dropped | |
| Disable max damage | |
| No throw, disable max damage | |
| Random weapon appears | |
| Many weapons | |
| Start with random weapon | |
| Start with weapons drawn | |
| Big heads |
Note: You must have a 2.1 or higher version of the Game Shark to use these codes in a Game Boy Color system.
| Infinite Health P1 | 01FF14CD |
| No Health P1 | 010014CD |
| Infinite Health P2 | 01FF54CD |
| No Health P2 | 010054CD |
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