Cheat Codes: Vroom, vroom!
Enter the following codes at the Press Start screen. You'll hear an engine noise if the code is entered correctly.
Unlock All Levels and 90 Bolts:
Up, Up, Down, Down, Left, Right, Left, Right, B, A
Unlock All Car Colors:
Up, Up, Left, Right, Right, Left, Down, Down
Unlock All Cars:
Right, Down, Right, B
Unlock All Screenshots at the Drive-In:
Left, Down, Right, A
Unlock Radiator Cap Secret Circuit:
Left, Left, Right, Right, B, B, A