Bronze Class Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "BRONZE" as a gym name to unlock all class bronze boxers in championship mode. Also, this unlocks Kemo Claw in arcade mode. (Thanks to Stncldrwg@aol.com)

Silver Class Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "SILVER" as a gym name to unlock all class silver boxers in championship mode. Note: This also unlocks Bruce Blade in arcade mode. (Thanks to Stncldrwg@aol.com)

Gold Class Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "GOLD" as a gym name to unlock all class gold boxers in championship mode. Note: This also unlocks Nat Daddy in arcade mode. (Thanks to Stncldrwg@aol.com)

Champ Class Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "CHAMP" as a gym name to unlock all class champ boxers in championship mode. Note: This also unlocks Damien Black in arcade mode. (Thanks to Stncldrwg@aol.com)