Cheat Mode
At the Goals/Notes/Images screen, press L2, R2, L1, R1, Start, Start, Start. A cheat tabulator will show up.
Quick start
Press X as soon as "Go" appears during the pre-race countdown.
Unlock next cup
At the main menu, press L1, R1, R2, L2. Enter this code repeatedly to unlock all seven championships.
All tracks
At the main menu, press L1, R1, R2, Square, Circle.
All cars
At the main menu, press L1, L2, R1, R2, Circle, Square.