Infinite ammo
At the main menu, press L2, R2, L1, R1, L2+R2, L1+R1.

Extreme Lap Challenge
At the main menu, press L1, L2, L1, R1, L1, R2, L1+R1, L2+R2

All Tracks
At the main menu, press L1, L1, L2, L2, R2, R2, R1, R1, L1+R1+L2+R2

Double prize money
At the main menu, press L1, L2, R2, R1, R1+R2, L2+L1.

Win Next Race
At the main menu, press L1+R1+L2+R2, L2+R2, R1+R2, L1+R1+L2+R2

StarCom team
At the team selection screen, press L2, R2, L1, R1, L2 + R2, L1 + R1.

Quick start
To get a jump start when you begin a race, hold Forward during the countdown without pressing Gas. As soon as "Go" appears, hit the accelerator.

Unlimited shields and turbo's
At the main menu, hit L1+R1 (at the same time), then L2+R2, L1+L2, then R1+R2.This should display a message saying unlimited energy. Start your game, but you will also get unlimited turbos once weapons and boost are activated after start. The code has to be re-entered for each race.

Infinite ammunition
At the team selection screen or the screen with the League Race and XG Mall options, press L2, R2, L1, R1, L2 + R2, L1 + R1. If you entered the code correctly, a message will appear. Unlimited ammunition will be available in one or two player games. This is especially useful when paired with the Rear Blaster item.