Downforce - Gameboy Advance
Singapore track:
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Enter 26241 as a code.
Sydney track:
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Enter 83424 as a code.
Jojo car:
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Enter 06254 as a code.
Kera car:
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Enter 16175 as a code.
Skye car:
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Enter 12711 as a code.
Vinnie car:
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Enter 17993 as a code.
Intermediate difficulty:
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Enter 41966 as a code.
Expert difficulty:
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Enter 74883 as a code.