I don't know if it works.. I don't have the game.
Unlock All Weapons:
cheat: Input the following commands during gameplay and within one second:
Hold the white and black buttons and press: Right, Right, Down, Up, Left, Left.
Unlock All Weapons:
cheat: Input the following commands during gameplay and within one second:
Hold the white and black buttons and press: Right, Right, Down, Up, Left, Left.