Level select:
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Pause the game and press Up, 1, Right, 1, Down, 1 to unlock all levels.
Invincibility:
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Pause the game and press Up, Down two times, Up, 1, 2.
Max stats:
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Pause the game and press Left two times, 2, Down, Down, 1.
Infinite Dashes:
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Pause the game and press 2 two times, 1, 2, Left, Up.
Infinite Supers:
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Pause the game and press Left, 1, Right, 1, Up, Down.
Disable Supers:
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Pause the game and press 1 two times, 2 two times, 1, Left.
Alternate costume:
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Pause the game and press 2, Up, 1, Up, Down, 2.