Pause the game and press Left(3), Right(3), Up(3), Down(3), Left(3), Right(3).
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1645EBB30C17A7BF F8A07CEF
Disable A.I. 3C1E04CF FBDCFEF63C1E04D3 F8FCFEFE
Unlock All Worlds/Tracks/Racers in Arcade Mode 3C298397 FBDCFEF63C29839B F8FCFEFE3C2983A3 F8FCFEFE3C2984FB FBDCFEF63C2984FF F8FCFEFE3C298407 F8FCFEFE