Ben 10: Protector of Earth - Unlock Galactic Enforcer Skin

Unlock Gwen 10 Skin:
Enter Left, Right, Left, Right, L, R, Select as a cheat code.

Unlock Ultra Ben Skin:
Enter Up, Right, Down, Left, A, B, Select as a cheat code.

Unlock Upchuck:
Enter A, Left, Y, Right, X, Up, B, Down, Select as a cheat code.

Ben Super Health:
While playing as Ben, press A, Left, A, Right, A, Left, A, Right...etc.