Here are some cheats and tips for the game The Haunted Mansion.
Zeke is a skeleton:
Hold A + B + X + Y at the opening sequence, before the legal screen. Release
the buttons at the title screen.
Zeke is invisible:
Hold A + B + L + R at the opening sequence, before the legal screen. Release
the buttons at the title screen.
Invincibility:
Hold Right, then press B, X(3), B, X, Y, A during game play.
Weapon upgrade:
Hold Right, then press B(2), Y(2), X(3), A during game play.
Level select:
Hold Right, then press X(2), B, Y(2), B, X, A during game play.