Hot Wheels Burnin' Rubber - Gameboy Advance
New cars:
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A new car is unlocked each time a set of courses is won.
Extra cup:
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Win all three cups to unlock the Extra cup.
Burst of speed:
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When starting a race on the 2 on the countdown (or last moment)
accelerate, you will get a boost for 3 seconds. Note: this does
not always work.