F-Zero Climax - Gameboy Advance
Climax Mode:
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When the menu screen appears just enter the code while holding the
two shoulder buttons. You must do it within several seconds of the
menu screen showing up and you will hear a noise. If you mess up you
need to either restart the game or go into a race and go back to the
menu.
Code - Effect
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Up, Down, Up, Down, Up, Down, Up, Down, Up, Down, A - Climax Mode
Character profiles:
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Select survival mode, then successfully complete the challenge for a
character to unlock the corresponding profile.