Enter at the title screen. A sound will confirm correct code entry.

Code	Effect
Up, Down, Left, Right, Up, Down, Up, Down	Activate Neckbreaker
Left(2), Up(2), Right(2), Down(2)	Big head mode
Up, Down(2), Up, Left(2), Up, Right(2), Up(3)	Easy mode
Quickly rotate the Left Analog-stick counter-clockwise four times	Oogie Boogie mode