Unlock all - cheat mode
At the "Press Start" screen, press X, B, L, R this should unlock everything
Big head mode
At the "Press Start" screen, press X, B, Up, Down.
Small head mode
At the "Press Start" screen, press X, B, Down, Up.
Flat mode
At the "Press Start" screen, press Down, Up, B, X.
Mike Tyson challenge
Defeat Mike Tyson and win the Gold belt to unlock the undisputed champ mode.
Play as Iron Mike
Win the Mike Tyson challenge to unlock Iron Mike, the early version of Mike Tyson.
Head back to our Mike Tyson Heavyweight Boxing cheats page for a load more cheats and tips for Mike Tyson Heavyweight Boxing.
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