One hit knock outs:
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Hold L + R and press A, X, X, A at the main menu.
High speed mode:
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Hold L + R and press X, X, Y, Y at the main menu.
Chicken heads:
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Hold L + R and press A, X, X, B at the main menu.
Toy block cars:
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Hold L + R press X, X, Y, B at the main menu.
Disable HUD:
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Hold L + R and press A, B, Y, X at the main menu.
Japanese Crash:
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Hold L + R and press B, X, B, X at the main menu.
