Enter the following codes at the main menu. The screen will usually flash if you entered the code correctly.
Bouncy bike - Up(x2), Y(x2), X(x2)
Big heads - B, X, R, L, Right
Extra turbo - Down(x3), L, R, Z
Moon gravity - Left, Right, Up, Down, B(x3)
Small mode - L, Z, Left, Right, B(x2)
Tag mode - Z, X, Z, X
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