Pause game, then press A, Right + B, Down + Left + R, Y + C + Z.
Pause the game and press and hold X, B, Z. Release and then press and hold L,L, Down, Y. Unpause the game.
Pause the game. Hold L. Release then press and hold A, C. Release then press and hold Z, L, R. Release then press and hold X, Z, Down. Unpause.
At the Game Over screen, press Up, Down, Right, Left.
Pause the game. Press and hold R, Left, Up, Right, C, B. Release then press and hold R, L. Unpause the game.
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