At the cheat codes screen, enter the following codes.
Effect Code 2nd Skin Start, X, R1, O, Square, Start All Boxers X, O, Square, Square, R1, R1, Square, O, X All Boxers' Life Mode X, Square, O, R1, X, Square, O, R1 Constant Power-Ups Start, X, O, X, O, X, CiO, Square, Square, Square, Start Conversation Mode Start, R1, X, O, Square, R1, R1, R1, Start Faster Boxers Mode Start, R1, R1, R1, R1, R1, R1, R1, R1, R1, R1, Start God Mode Start, X, X, O, O, R1, R1, Square, Square, Start Scrap Yard Arena Start, O, R1, O, R1, X, X, Start Turbo Mode Start, R1(10 times), Start Unlock International Mode Start, X, X, X, O, O, O, Square, Square, Square, START
Unlockable How to Unlock 2nd Costumes Complete a characters ''life mode'' to unlock their 2nd costume. Fight as Odiva In order to fight as ''Odiva,'' win the third tournament. Fight as Practice Robot In order to fight as the practice robot, complete training mode successfully. Play as Trainer To play as Trainer, complete training mode with one character. He can now be used in 1P Fight, 2P Fight, and Training Mode. Unlock First Hidden Character Complete Training mode with any character to unlock 1 hidden character. Unlock Fourth Hidden Character Complete World Championship tournament to unlock the 4th hidden character. <BR>Complete the hidden Intercontinental tournament to unlock the final hidden character. Unlock Intercontinental Tournament Complete all 5 tournaments to unlock the hidden Intercontinental Tournament Mode. Unlock Scrapyard Arena Complete all survival modes with any character to unlock the ScrapYard arena for 1p and 2p fights. Unlock Second Hidden Character Complete Pro tourament to unlock the 2nd hidden character. Unlock Third Hidden Character Complete Top Contender tournament to unlock the 3rd hidden character.
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