These codes can all be entered on the Start Menu, without prompting, to enable various cheats. Enter again to deactivate.

Code	Effect
B, B, B, LStick, RStick	Big head mode.
LB, RB, X, B, RB	Makes all enemies in the game harder for more challenge.
LB, X, LB, X, RB	If you die in FreePlay Mode, the song continues until the end.
View, View, B, X, B	All songs play 33% faster. "Chipmunk mode".
X, B, X, X, B, A	Unlock all songs, heroes, and abitities in FreePlay Mode.
X, X, X, B, B, RStick	Converts much of the game's text and dialogue to childish gibberish.