All cars:
Press L1, L2, R1, R2, Circle, Square at the main menu.

All tracks:
Press L1, R1, R2, Square, Circle at the main menu.

Unlock next cup:
Press L1, R1, R2, L2 at the main menu. Enter this code repeatedly to unlock all seven championships.

Quick start:
Press X immediately when "Go" appears during the pre-race countdown.

Hint: Fire backwards:
Hold R2 then hold Down while racing and fire. Press Up to fire bouncing bombs forward.

Hint: Drive faster:
Your car will go faster if you drive in reverse. At the start of each race, quickly turn around and start driving in reverse. You will be behind, but can quickly catch up and win.