Go to the car select screen and press Up, Up, Down, Down, Left, Right, Left, Right, Square, X. If you input the code correctly, the ultimate car, Furasshu-sama, will immediately appear on the screen. If your not fast enough you'll be taken to another screen upon pressing x.
Submitted by Crash Racer4
Go to Create Car Put In Up Down Left Right Up Down Left Right in 10 seconds fast. Lights Just Work At Night
Submitted by Daniel Castillo