At the main menu, choose Extras, and once in the Extras Menu, Select Cheats. Then select Enter Code and then enter these codes. If you entered the code correctly, "New Cheat Unlocked" will appear on your screen. Now go to Toggle Cheat to activate the cheat.
All Levels: 3285554497
All Suits: 7025552918
All Surfers: 9495556799
All Tricks: 6265556043
First-Person View: 8775553825
High Jumps: 2175550217
Maximum Stats: 2125551776
Mega Cheat: 7145558092
Trippy Mode: 8185551447
Unlock Freak: 3105556217
Unlock Pastrana: 8005556292
Unlock Tiki God: 8885554506
Unlock Tony Hawk: 3235559787