Go to the main menu and press L, R, L, R, X, X, Y, Y
Go to the main menu and press X, Y, X, Y, L, R, R, L, L
Get 120 Achievement Points & power moves
Go to the main menu and press L, L, R, R, L, R, L, R
Get Unlimited Batlaunchers
Go to the main menu and press Y, X, Y, X, L, R, L, R
Get All Weapons & Max Ammo
At the Plant Electrocution Level 2 slide down toward the holes in the ground and go in the 2nd hole. Make sure to glide into the hole and glide toward the lighted area. Pick up the items key. Get the grapple and use it to get out of the hole and finish your slide. The key you got was for the door beside the vines behind the glass. Now go in and fight the plant man and get a envelope that has a 'C' on it. When you finish the game this will activate the cheats.
Get All Movies
Go to the main menu and press L, L, X, X, Y, X, L, R
Get Unlimited batrings
Go to the main menu and press L, R, Y, X
Skip the fight with Trench Coat
Go to Plant Electrocution 2. When you get to the part where you see Mayor Hill, sneak around him until get to the door go through the door and you will not have to fight Trench Coat. You will only have to fight Poison Ivy's greatest creation.
main menu press lxxyyrab
Submitted by raph