Game Guides, Cheats, Codes, Hints and Walkthroughs for Advance Gta on GameBoy Adv..
Select championship mode and win the beginner, middle, and high speed classes. An “Extra” option will now be unlocked at the main menu. Select it to race in mini-cars.
Hold the L and R buttons. Then, push right on the D-pad and B simultaneously. You will hear a chime if you entered the code correctly. Go to the main menu, and you will see that you have unlocked the Extra 1 mode.
High speed mode unlocked
Enter the password: 2QjD +D1Q 9Fy2 5B0C.
50% of cars unlocked
Enter the password: /6Kb /xMi irLM +/22
Finish in first place in all the races in all four championship classes.