Haunted Mansion, The Cheat Codes for Playstation 2

Weapon Upgrade:
While playing, hold Right then press Square, Square, Triangle, Triangle, Circle, Circle, Circle, X.

Invincibility:
While playing, hold Right then press Square, Circle, Circle, Circle, Square, Circle, Triangle, X.

Skeleton Zeke:
Before the copyright screen at start-up, hold Circle, Square, X, Y.

Invisible Zeke:
Before the copyright screen at start-up, hold X + Square + L1 + R1.

Play as Skeleton Zeke
To play as Skeleton Zeke, press and hold down the following button combos when the game's "legal screen" appears (the one with all the copyrights, etc): TRIANGLE, CIRCLE, SQUARE, X.

Level Select:
While playing, hold Right then press Circle, Circle, Square, Triangle, Triangle, Square, Circle, X.