Enter the codes at the character selection screen.
Cheat mode | Left, Right, Left, Left, Right, Up, Down, R1, R1, R1, R1, R1, R2. |
All boxers | Left, Left, Right, R2, Left, Right, Right, R1, R1, R2. |
All champion costumes | Left, Down, Right, Right, Up, R1, R2, R1 (20 times), R2. |
All holiday costumes | Left, Left, Down, Right, Up, R1, R1, R1, R1, R1, R1, R1, R1, R2, R1, R1, R1, R1, R2. |
St. Patricks Day | Right, Up, Down, Down, Down, R1, R1, R1, R2. |
New Years | Right, Up, Down, Down, Down, R1, R2. |
Fat boxer | Right, Right, Up, Down, Right, R1, R1, R2. |
Independence Day | Right, Up, Down, Down, Down, R1, R1, R1, R1, R1, R2. |
Easter | Right, Up, Down, Down, Down, R1, R1, R1, R1, R2. |
Undead boxer | Left, Up, Right, Down, R1, R1, R2. |
Halloween | Right, Up, Down, Down, Down, R1, R1, R1, R1, R1, R1, R2. |
Thanksgiving | Right, Up, Down, Down, Down, R1, R1, R1, R1, R1, R1, R1, R2. |
Thin boxer | Right, Right, Up, Down, Right, R1, R2. |
Big head | Right, Right, Up, Down, Right, R1, R1, R1. |
St. Valentines Day | Right, Up, Down, Down, Down, R1, R1, R2. |
Christmas | Right, Up, Down, Down, Down, R1, R1, R1, R1, R1, R1, R1, R1, R2. |
Fast mode | Right, Right, Up, Down, Right, R1, R1, R1, R1, R1, R2. |
Big gloves | Left, Right, Up, Down, R1, R2. |
All training | Left, Down, Up, Down, Up, R1 (20 times), R2. |
New Years | Right, Up, Down, Down, Down, R1, R2. |
Start at final match | R2, Down, Right, Up, Left, R1, R1, R1, R1, R1, R1, R2, R1, R1, R2. |
Unlock Freak E. Deke & M. Jackson | R1 (13 times), R2, R1 (10 times), R2. |
Pause, then press R2, R1, R1, R2, R1, R2, R1, R1, R1, R1, R2, Left, Right, Up, Down.