Freekstyle - Gameboy Advance
Master code:
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Enter CODE as a code to unlock all riders, tracks and cups.
Motox Triple and Mad Mike:
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Enter CACTUS as a code.
Level 3:
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Enter MOMO as a code.
Super boost:
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To get super boost, do a lot of tricks throughout the level you are playing
until the little circle at the bottom left of the screen turns red and green
and starts shaking. Then, go up a ramp, hold L + R and press Up, Down, Left
or Right. If done correctly, you should get full boost.