Successfully complete the game, then hold L1 + L2 + R1 + R2 at the mode selection screen:
Enter "Go Wild!" as a password to unlock all gadgets. Enter "Limited!" as a password to disable this effect.
Enter "NORMAL!" as a password to unlock the normal difficulty setting.
Enter "HARD!" as a password to unlock the hard difficulty setting.
Successfully complete the game to unlock Jake in versus mode.
Collect all presents for a character to unlock Dark Jake in versus mode.
Successfully complete the game in first place.
