| MLB Slugfest 2004 (PlayStation 2) | CheatingDome.com | 
| Effect | Code | 
|---|---|
| Alien team | 2-3-1 Down | 
| Atlantis stadium | 3-2-1 Left | 
| Big heads | 2-0-0 Right | 
| Blade bat | 0-0-2 Up | 
| Bobble Head team | 1-3-3 Down | 
| Bone bat | 0-0-1 Up | 
| Casey team | 2-3-3 Down | 
| Caveman bat | 0-0-1 Right | 
| Coliseum stadium | 3-3-3 Up | 
| Dwarf team | 1-0-3 Down | 
| Eagle team | 2-1-2 Right | 
| Empire stadium | 3-2-1 Right | 
| Evil Clown team | 2-1-1 Down | 
| Extra time after plays | 1-2-3 Up | 
| Extra time to enter codes | 3-0-3 Up | 
| Infinite turbo | 4-4-4 Down | 
| Forbidden stadium | 3-3-3 Left | 
| Dolphin team | 1-0-2 Down | 
| Gladiator team | 1-1-3 Down | 
| Horse team | 2-1-1 Right | 
| Ice bat | 0-0-3 Up | 
| Lion team | 2-2-0 Right | 
| Little League mode | 1-0-1-Down | 
| Log bat | 0-0-4 Up | 
| Mace bat | 0-0-4 Left | 
| Maximum speed | 0-0-3 Left | 
| Maximum power | 0-3-0 Left | 
| Maximum batting | 3-0-0 Left | 
| Midway Park stadium | 3-2-1 Down | 
| Minotaur team | 1-1-0 Down | 
| Monument stadium | 3-3-3 Down | 
| Napalitano team | 2-3-2 Down | 
| No contact | 4-3-3 Left | 
| No fatigue | 3-4-3 Up | 
| Oshlan team | 2-2-2 Down | 
| Pinto team | 2-1-0 Right | 
| Rivera team | 2-2-2 Up | 
| Rocket Park | 3-2-1 Up | 
| Rodeo Clown team | 1-3-2 Down | 
| Rubber ball | 2-4-2 Up | 
| Scorpion team | 1-1-2 Down | 
| Small heads | 2-0-0 Left | 
| Softball | 2-4-2 Down | 
| Spike bat | 0-0-5 Up | 
| Sub-Zero team | 1-2-2 Down | 
| Terry Fitzgerald team | 3-3-3 Right | 
| Todd McFarlane team | 2-2-2 Right | 
| Tournament mode | 1-1-1 Down | 
| Wiffle bat | 0-0-4 Right |