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| Game Shark Code List | 100% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Was this cheat: (-)Bogus or (+)Helpful | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mike Tyson challenge | 100% | |
| Defeat Mike Tyson and win the Gold belt to unlock the undisputed champ mode. | ||
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| Super mutant mode | 100% | |
| At the "Press Start" screen, press Square, Left, Up, Triangle. | ||
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| Extra custom boxer textures | 100% | |
| At the "Press Start" screen, press L1, R1, X(2), Triangle, X to unlock additional custom boxer textures. | ||
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| Flat mode | 100% | |
| At the "Press Start" screen, press Down, Up, Circle, Square. | ||
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| Small head mode | 100% | |
| At the "Press Start" screen, press Square, Circle, Down, Up. | ||
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| All boxers | 100% | |
| Win the Bronze, Silver, and Gold belts to unlock all boxers including Mike Tyson. | ||
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| Big head mode | 100% | |
| At the "Press Start" screen, press Square, Circle, Up, Down. | ||
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| Cheat mode | 100% | |
| At the "Press Start" screen, press Square, Circle, L2, R2 to unlock all boxers, arenas, and game modes. | ||
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| Alternate credits | 100% | |
| At the "Press Start" screen, press X, Triangle, Square, Circle to alternate the credits. | ||
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| Iron Mike | 98% | |
| Win the Mike Tyson challenge to unlock Iron Mike, the early version of Mike Tyson. | ||
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