Samurai Jack: The Shadow of Aku - Lightning sword

Crystal Sword:
During gameplay, press DOWN on the Right Analog Stick UP on the C-Sick, A, X, B, Y.

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

Flame Sword:
Hold Up Control Stick and Down C Stick and press B, A, X, Y.

Get Jack to Wear the Straw Hat:
Take Jack to the forest village area. Now leave the controller alone for a few minutes; don't touch any buttons. After a short time Jack will kneel down, pick some grass, and make himself a straw hat. This happens to be the same hat that Jack wears in the actual cartoon. Also, you can fight while wearing the hat until you sustain damage.

Giant Chicken Attack:
When you enter the first town of the game there are chickens running around on the ground. Simply chase one of them and slash it with your sword. It will turn into a Giant Chicken and start attacking you.

Max Health Meter:
Hold Right Control Stick and Left C Stick and press A, X, Y, B.

Max Zen Meter:
Hold Left Control Stick and Right C Stick and press X, A, B, Y.

Models:
Complete the game on Hard difficulty.

Sketches:
Complete the game on Easy difficulty.

Backgrounds:
Complete the game on Normal difficulty.