Cheat MenuAt the Main Menu, press Left, Left, Right, Right, Up, Down, Left, Right, Up, Up, Down, Down. Then highlight Cheat by pressing Down. When selecting a level, press Right to display extra levels.
Unlimited LivesEnter "Cheat Menu" code above, then at the Title screen, press L1, R1, L2, R2, L1, R1, L2, R2.
Level SkipEnter "Cheat Menu" code above, then during gameplay, press R1, R2, L1, L2, R2, L1, L2, L2, L2.
