All Boxers
Win the Bronze, Silver, and Gold belts to unlock all boxers.

Big Head Mode
At the 'Press Start' screen, press X, B, Up, Down for big head mode.

Flat Mode
At the 'Press Start' screen, press Down, Up, B, X for flat mode.

Mike Tyson Challenge
Defeat Mike Tyson and win the Gold belt.

Play as Iron Mike
Win the Mike Tyson challenge to unlock Iron Mike.

Small Head Mode
At the 'Press Start' screen, press X, B, Down, Up for small head mode.

Unlock Everything
At the 'Press Start' screen, press X, B, L, R to unlock all boxers, arenas, and game modes.

Go to: Mike Tyson Heavyweight Boxing Info Page | nGaming Home Page.