During a game, hold L2+R2 and press Right, Right, Down, Up, Left, Left.

At any time your playing enter l2 r2 and press right right down up left left

All Boxers
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, R1, X, O, Square, R1, R1, R1, Start


Conversation Mode
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, X, O, Square, Square, R1, R1, Square, O, X, Start


Double Speed
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, R1 x10, Start


Intercontinental Mode
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, X, X, X, O, O, O, Square, Square, Square, Start


Scrap-Yard Scene
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, O, R1, O, R1, X, X, Start


Second Skin
Entry Location:
From the setup menu, choose cheat codes then enter the code

Start, X, R1, O, Square, Start

During game play
Hold L2 + R2 then press Right, Right, Down, Up, Left Left