This game is also available on PS2.
Retro Game Cheats for Mike Tyson Heavyweight Boxing (Xbox)
Effect: unlocks all boxers
Effect: unlocks flat mode
When:
title screen
How:
press Down, Up, B, X when "Press Start" appears at the title screen.
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Effect: unlock the undisputed champion mode
Effect: lets you fight as mike tyson
Effect: Makes your custom boxers sats higher
When:
During gameplay
How:
To get your sats up beat the players on exibition and you will get $1million dollars for each player you beat. Then use the money to buy sats on custom boxer mode.
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