At the title screen
When in play: pause the game and press L2 and R2 to bring up the cheat menu.
Max Lives 80076ABC0009
Max Crystals D0076B4C0000
80076B4C0063
Max Swap Meet Pete Card 80076AC4270F
Always Have Magic Eye Zoomers 80076B780002
Always Have Key 80076B540001
Drive Thru Walls 8004b9de1000