Mike Tyson Heavyweight Boxing - Platform: Playstation 2

Master code
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Press Square, Circle, L2, R2 when "Press Start" appears at the title screen.

All created boxer items
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Press L1, R1, X(2), Triangle, X when "Press Start" appears at the title
screen.

Big heads
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Press Square, Circle, Up, Down when "Press Start" appears at the title
screen.

Small heads
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Press Square, Circle, Down, Up when "Press Start" appears at the title
screen.

Random sized boxers
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Press Square, Left, Up, Triangle when "Press Start" appears at the title
screen.

Flat mode
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Press Down, Up, Circle, Square when "Press Start" appears at the title
screen.

View full credits
-----------------
Press X, Triangle, Square, Circle when "Press Start" appears at the title
screen.

All boxers
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Win the Bronze, Silver, and Gold belts.

Mike Tyson Challenge
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Defeat Mike Tyson and win the Gold belt to unlock the undisputed champ
mode..

Fight as Mike Tyson
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Win the Gold Belt to unlock Mike Tyson in single player mode.

Fight as Iron Mike
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Win the Mike Tyson Challenge to unlock Iron Mike, the early version of Mike
Tyson.