Invincibility
While playing the game, click and hold the Left Analog-stick and press B, A, Y, X.

Give all
While playing the game, click and hold the Left Analog-stick and press X, Y, A, B.

Infinite ammunition
While playing the game, click and hold the Left Analog-stick and press Black, A, Y, White.

Map change
While playing the game or at a menu, click and hold the Left Analog-stick and press Black, B, A, White. A list of all the levels, except the intermission only ones, will appear and can be selected.