Activate Cheat Menu:
Press 'Select' to access the controller display and then hold L1 during the controller help screen to enter the cheats.
Immune to Damage:
X, O, X, Left, Left, Square, R1, Down, Square, Square
Get 2 Extra Clams and Fame:
Circle, Circle, X, X, Circle, X, Circle, Circle Get 2 Extra Clams and Fame
Press 'Select' at any level where you can obtain Pearls to enter the following codes
Replace Pearls with Coins:
Hold L1 and enter O, X, O, O, O, X, O, O
Some Creatures Fly Off Screen:
Hold L1 and enter O, O, O, O, X, O, O, O, O
Replace ALL Pearls with Fish King Coins:
Hold L1 and enter O, X, O, O, O, X, O, O