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