Here are some cheats and tips for the game He-Man: Defender of Grayskull.
Cheat mode:
Enter the code entry screen from “Options” menu, then enter one of the
following codes to activate the corresponding cheat function.
Invincibility:
Press Right, Circle, Up, Left, X.
Level select:
Press X, Left, Up, Circle, Down.
Unlimited Grayskull power:
Press Down, Right, X, Circle, Down.
Double damage:
Press Circle, Right, X, Up, X.