Mike Tyson Heavyweight Boxing - Platform: Playstation 2 Master code ----------- Press Square, Circle, L2, R2 when "Press Start" appears at the title screen. All created boxer items ----------------------- Press L1, R1, X(2), Triangle, X when "Press Start" appears at the title screen. Big heads --------- Press Square, Circle, Up, Down when "Press Start" appears at the title screen. Small heads ----------- Press Square, Circle, Down, Up when "Press Start" appears at the title screen. Random sized boxers ------------------- Press Square, Left, Up, Triangle when "Press Start" appears at the title screen. Flat mode --------- 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 ----------- Win the Bronze, Silver, and Gold belts. Mike Tyson Challenge ---------------------- Defeat Mike Tyson and win the Gold belt to unlock the undisputed champ mode.. Fight as Mike Tyson -------------------- Win the Gold Belt to unlock Mike Tyson in single player mode. Fight as Iron Mike ------------------ Win the Mike Tyson Challenge to unlock Iron Mike, the early version of Mike Tyson.