Mashed

Master code:
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Press [Up] [Right] [Down] [Left] [Up] [Left] [Down] [Right] [Up] [Down] 
[Up] [Down] at the main menu to unlock all options at the "Bonus 
Features" menu. 

Camera options:
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Win all Challenge Cup events to unlock the "Flipped-cam", "Mashed-cam", 
"Oz-cam", and "Retro-cam" options at the "Bonus Features" menu. 

Quick start:
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Press [Gas] on the on the fourth beep during the pre-race countdown.