GT Advance Championship Racing Cheats (GameBoy Advance)

Go to the main menu, then press and hold L and R. Press Up + Left + B.

Rev your engine up to the red power line while the countdown before the race is going.
Keep it there to blast off with a burst of speed when the race begins.

At the title screen, press and hold L + R, then press Left, then B. The Extra 2 option
will now be available. This will allow you to race with F1 cars.

To unlock all of the tracks in the game, go to the main menu. Press and hold L and R, then
press Up + Right + B.

At the title screen, press and hold L + R, then press Right, then B. The Extra 1 option
will now be available. This will allow you to race with go-karts.

At the main menu, press and hold L and R, then press Down + Right + B.

At the title screen, press and hold L + R, then press Up, then B. This will allow you to
see the Credits at the end of the game.

Beat the championship mode races for all three classes. There should now be a special
mini-racer mode enabled on the main menu.