Mike Tyson Heavyweight Boxing Cheats & Tips

Enter all of these at the press Start Screen
Master Code: Square, O, L2, R2
All Create-A-Boxer items-L1, R1, X, X, Triangle, X
Credits-X, Triangle, Square, O
Flat Mode-Down, Up, O, Square
Small Head-Square, O, Down, Up
Super Muatant Mode-Square, left, up, triangle

At the start screen enter:

Square, O, Up, Down

To Unlock "Iron Mike" you have to beat "Tyson's Challenge", "Iron Mike" is an even tougher version of Mike Tyson.