This game is also available on Xbox 360.
Retro Game Cheats for Fight Night 3 (PlayStation 2)
Effect: Unlocks Slickster fighting style.
Effect: Unlocks Smooth fighting style.
Effect: Unlocks Madison Square Garden venue for freeplay/exhibition.
Effect: Unlocks Judge Jab fighting style.
Effect: Unlocks Lethal Uppercuts fighting style.
Effect: Unlocks the Sinister Cross fighting style.
Effect: Unlocks the Textbook fighting style.