Downforce Cheats for Gameboy Advance
At the 'Main' menu, select 'Continue' and input the following codes
06254 - Unlock 1st Hidden Car (Jojo)
83424 - Unlock 1st Hidden track (Sydney)
16175 - Unlock 2nd Hidden Car (Kera)
26241 - Unlock 2nd Hidden Track (Singapore)
12711 - Unlock 3rd Hidden Car (Skye)
17993 - Unlock 4th Hidden Car (Vinnie)
41966 - Intermediate
74883 - Expert
Enter 83424 as a code.
Enter 41966 as a code.
Enter 17993 as a code.
Enter 06254 as a code.
Enter 12711 as a code.