All power-ups:
Pause the game, then hold L + R and quickly press X, B, X, B, X, B, B, B, X, X, B, X, X, X.
All FMV sequences:
Pause the game, then hold L + R and quickly press B, B, B, X, X, X, B, X, B.
View credits:
Pause the game, then hold L + R and quickly press B, X, X, B, X, B.
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