All creatures
Press [Left], [Right], [Left]x2, [Right],
[X] at the main menu.
All multi-player levels
Press [Left], [Right], [Left]x2, [Right],
[Left], [Right], [X] at the main menu.
Invincibility
Press [Start] to pause game play, then press [Left]x2,
[Right]x2, [Up]x4, [X], [Up], [X].
Mark all objectives complete
Press [Start] to pause game play, then press [Left]x2,
[Right]x2, [Down]x3, [Up], [Down]x2, [X].
Crystal
Press [Start] to pause game play, then press [Left]x2,
[Right]x2, [Left], [Up], [Right], [Down],
[Left], [X]x2. A message will be spoken to confirm
correct code entry.