Easier Game Cheat:
At the main menu press UP, DOWN, DOWN, UP, LEFT, LEFT, UP, RIGHT, RIGHT, UP, UP, UP. You should hear a weird sound indicating the code worked.
Bouncy Things Cheat:
At the main menu press rotate Analog Stick 4 full clockwise rotations. You should hear a weird sound indicating the code worked.
Super Deform Mode:
At the main menu press LEFT, LEFT, UP, UP, RIGHT, RIGHT, DOWN, DOWN. You should hear a weird sound indicating the code worked.