Unlimited Energy:
Enter this code using the D-pad and while the title screen: UP, UP, LEFT, DOWN, LEFT, RIGHT.

Improved Attacks:
Enter this code using the D-pad and while the title screen: LEFT, LEFT, LEFT, UP, DOWN, RIGHT, LEFT.

Unlock Other Costume:
Enter this code using the D-pad and while the title screen: LEFT, RIGHT, RIGHT, UP, DOWN, LEFT.