All power-ups
Pause the game, then hold L1 + L2 + R1 + R2 and press Circle, Square, Circle, Square, Circle, Square(3), Circle(2), Square, Circle(3).
All FMV sequences
Pause the game, then hold L1 + L2 + R1 + R2 and press Square(3), Circle(3), Square, Circle, Square.
View credits
Pause the game, then hold L1 + L2 + R1 + R2 and press Square, Circle(2), Square, Circle, Square.
Holiday bonuses
Change the PlayStation 2 system date to one of the following entries to see special things at the front yard and the mystic playground:
January 1: Fireworks
February 14: Hearts on Scooby Snacks
March 17: Green fountain water and smoke from chimneys
July 4: Red, white, and blue fireworks, fountain water, and smoke from chimneys
October 31: Giant bats over courtyard door for decoration
December 25: Snow
December 31: Fireworks
Power-ups
Double-Jump Spring: Press X(2) while jumping.
Football Helmet: Hold Square.
Bunny Slippers and Lampshade: Press R2.
Walk with Bunny Slippers: Hold R2 and walk in any direction.
