Samurai Jack: The Shadow Of Aku

Crystal sword:
Press Analog-stick Down + C-stick Up, A, X, B, Y during game play

Fire sword:
Press Analog-stick Down + C-stick Up, A, then press B, A, X, Y.

Lightning sword:
Press Analog-stick Down + C-stick Up, A, then press X, A, Y, B.

Maximum Zen:
Hold the Analog-stick Left + C-stick Right, then press X, A, B, Y during game play.

Maximum health:
Hold the Analog-stick Left + C-stick Right, then press A, X, Y, B.

Sketch gallery:
Successfully complete the game under the easy difficulty setting.

Background gallery:
Successfully complete the game under the normal difficulty setting.

Model gallery:
Successfully complete the game under the hard difficulty setting.