Unlock Movies
To unlock the movies, pause the game and hold all 4 shoulder buttons. Then press: SQUARE, SQUARE, SQUARE, CIRCLE, CIRCLE, CIRCLE, SQUARE, CIRCLE, SQUARE.

Unlock Credits
To unlock the Credits, pause the game and hold all 4 shoulder buttons, then press (quickly): SQUARE, CIRCLE, CIRCLE, SQUARE, CIRCLE, SQUARE.

Holiday Easter Eggs
To see various holiday Easter Eggs, set your clock to the listed date. Here's what happens on each holiday:
January 1st: Fireworks appear in the courtyard.
February 14th: Hearts appear on Snack pickups.
March 17th: The fountain is green and chimneys emit green smoke.
July 4th: Fountain and chimneys on house are colored red, white & blue. Fireworks in the courtyard are also red, white & blue.
October 31st: Bats can be found hanging in the courtyard.
December 25th: Snow appears in the courtyard.
December 31st: Fireworks appear in the courtyard.

Unlock All Power-Ups
To unlock all power-ups, pause the game and hold all 4 shoulder buttons, then press: CIRCLE, SQUARE, CIRCLE, SQUARE, CIRCLE, SQUARE, SQUARE, SQUARE, CIRCLE, CIRCLE, SQUARE, CIRCLE, CIRCLE, CIRCLE.

Where & How to obtain all the Power-ups...
SPRINGS (double jump) - 'Fear on the pier' part 2.
HELMET(super bash) - On top of d hill in 'chills & spills on haunted hill'
SUPER SMASH - 'Lighthouse fright house'. Bash d light on d top floor.
SUPER SMASH UPGRADE - 'Misbehavin can cause cave in' part 3 or 4...
YELLOW BOOTS - Beat d Dark Knight in 'A Dark & Stormy Knight'.
BUBBLE GUM - Beat d Pirate in 'Shiver Your Timbers, Scooby'.
UMBRELLA - Beat Green Ghost in ' Gloom & Doom Down in the Tomb'.
PLUNGER - 'Creepy Crawlies in the Hallways' part 3.
SOAP BUBBLE - 'Who's Yella in the Cella?' part 4.

Lighthouse cheat
Use your helmet to bash the light at the lighthouse after it gets to the top.

PS2 Cheats for Scooby Doo: Night of 100 Frights

Scooby Doo: Night of 100 Frights cheat codes

Scooby Doo: Night of 100 Frights cheats