In-game reset:
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Press Select + Start + A + B during game play.
Demonstration mode:
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Press Select at the title screen.
Delete saved games:
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Hold L + R and turn on the Game Boy Advance. Select „Yes” at
the prompt to delete your game saves.
Dirty Joker:
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Win the Pawn, Knight and Bishop tracks under the standard
difficulty setting.
Stingray:
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Win the Pawn, Knight and Bishop tracks under the expert
difficulty setting.
Master difficulty setting:
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Win the Pawn, Knight, or Bishop series under expert difficulty
level in grand prix mode to unlock the master difficulty for that
series.
Silver Thunder:
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Win the Queen tracks while playing the expert difficulty setting.
Jet Vermilion:
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You can unlock Jet Vermilion by unlocking all other cars and completing
championship mode 255 times. Or beat every series on Master Class
with all other racers.
Fighting Comet:
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Win the Pawn, Knight, Bishop and Queen tracks while playing the master
difficulty setting.
Falcon Mk. II:
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Win any set of tracks while playing the expert difficulty setting.
Soft reset:
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Hold down the A, B, Start and Select buttons.