All Power Moves and 120 Achievement Points
At the Title screen press L1 L1 R2 R2 L2 R2 L1 R2.
At the Title screen press Circle Square Circle Square L1 R1 L2 R2.
At the Title screen press Square Circle Square Circle L2 R2 R2 L2.
At the Title screen press L2 R2 L2 R2 Square Square Circle Circle.
Unlimited Batarangs and Electric Batarangs
At the Main Menu perss L1 R1 L2 R2.
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.
GameShark Codes click here