Level select
Pause game play and press [Up], [Left], [Up],
[Left], [Up], [Left]x3, [Right]x3, [Down],
[Left], [Down], [Left], [Down], [B].
Invincibility
Pause game play and press [A], [Y], [A],
[Y], [L], [R], [L], [R], [X], [B]x2.
Restore energy
Pause game play and press [Select], [A],
[Y], [A], [Y], [X], [B], [X], [B],
[R]x2, [Select].