Level select:Enter the code entry screen from the "Options" menu, then enter X, Left, Up, Circle, Down as a code.
Invincibility:
Enter the code entry screen from the "Options" menu, then enter Right, Circle, Up, Left, X as a code.
Infinite Grayskull power:
Enter the code entry screen from the "Options" menu, then enter Down, Right, X, Circle, Down as a code.
Double damage:
Enter the code entry screen from the "Options" menu, then enter Circle, Right, X, Up, X as a code.
