Enter the Magazine Menu then exit. Hold L and press Up Down Up Down Up Down Down Up Left Right Left Right Left Right Right.
Complete the game in King Battle mode. Then enter the King Battle menu and load the completed saved game. Enter the Car Selection screen and exit. Enter the Magazine Menu and exit. Hold Start and press Up Down Left Right Up Down Left Right Up Down Left Right.
Destruction Derby Mode
In Magazine Mode view all the ads then at the Mode Selection screen hold Y and press Left Left Up Left Right Right Down Up.
Drag Race Mode
In Magazine mode view all the ads then at the Mode Selection screen hold R and press press Up8x Down Left Down Right Down Left Down.