Zero: The Kamikaze Squirrel (SNES)
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Pause game play and press R, Up, B, A, Down, Up, B, Down, Up, B.
Level select
Pause game play and press R, Up, B, Y, A.
Unlimited energy
Pause game play and press B, Up, B(2), A.
Unlimited lives
Pause game play and press B, A, B(2), Y.
Unlimited shurikens
Pause game play and press Down, A, B.