Turn off that pesky rear view mirror:
Pause while playing. Press and hold Triangle and press L1 or R1 to toggle mirror on or off.
Finish the Normal GP (all the classes). Let the credits roll until the end. Now save the whole game into a brand new memory card block. Go to Extra GP mode at class 1. You should be able to choose 1 car (Gnade). Choose it and begin the race. But during the countdown, press Start and choose Retire to quit. Finally, enter the Normal GP again and choose class 1. You should now have Infinite money.
Access Mirrored Tracks:
During the music select scene before the game begins, press and hold L1+R1+Start+Select until the race begins. Every thing will be backwards.
More paint colors:
While painting, move the pointer out of the painting area and hold L1+L2+R1+R2+Select. New options R, G, and B will show up on the right side of the screen.
GameShark CodesDarwin Awards' JATO Car8009e4800aaf Extra Cash8019c610ffff Infinite Cash8019c610c9ff 8019c6123b9a Infinite Race Tries801e3ffa0005 Place 1st8009e53c0001
Thanks to Revolution readers Dustin Dove, Carl Haugland, ji ji the monkey man,
and Martyn Oatridge!