Enter the following at the "Press Start" screen. You'll hear an engine noise to comfirm each time you enter a code correctly.
| Code | Effect
|
|---|
| Left, Left, Right, Right, B, B, A | Unlock Radiator Cap Secret Circuit.
|
| Left,Down,Right,A | unlock all screenshots at the Drive-In.
|
| Right,Down,Right,B | Unlock all cars.
|
| Up,Up,Down,Down,Left,Right,Left,Right,B,A | 90 Bolts and all level unlocked.
|
| Up,Up,Left,Right,Right,Left,Down,Down | Unlock all car colors.
|
