All boxers:-  Enter MIKE TYSON as a name.

All arenas:-  Enter LENNOX LEWIS as a name.

God mode:-  Enter MUHAMMAD ALI as a name.

Big head mode:-  Enter DAVID TUA as a name.

Dumb CPU boxers:-  Enter JESSICA MELTON as a name.

Gassy boxers:-  Enter ADAM GARDNER as a name.

Fight as practice robot:-  Successfully complete training mode.

Alternate costumes:-  Successfully complete Boxers Life mode with a boxer to unlock a new costume for that character.

Restore energy:-  Rapidly press X repeatedly after getting knocked down to restore a small amount of energy and help prevent a knockout.

Unlock Intercontinental Mode:-  Go to Setup, then Cheat Codes, and press the following buttons: Start, X, X, X, Circle, Circle, Circle, Square, Square, Square, Start.

All Boxers Life Unlocked:-  Go to Setup, then Cheat Codes, and press the following buttons: Start, X, Square, Circle, R1, X, Square, Circle, R1, Start.

Unlock All Boxers:-  Go to Setup, then Cheat Codes, and press the following buttons: Start, X, Circle, Square, Square, R1, R1, Square, Circle, X, Start.

Double Speed:-  Go to Setup, then Cheat Codes, and press the following buttons: Start, R1, R1, R1, R1, R1, R1, R1, R1, R1, R1, Start.

Invulnerability For Boxer 1:-  Go to Setup, then Cheat Codes, and press the following buttons: Start, X, X, Circle, Circle, R1, R1, Square, Square, Start.