Get All Creatures: Go to the main menu and press Left, Right, Left, Left, Right, X

Get Invincibility: Go to the main menu and press Left, Left, Right, Right, Up, Up, X

Get Crystal: Go to the main menu and press Left, Right, Left, Up, Right, Down, Left, X, X

Get All Multi Player Levels: Go to the main menu and press Left, Right, Left, Right, Up, Left, Right, X

Get All Objectives Completed: Go to the main menu and press Left, Right, Right, Down, Up, Down, Down, X