Have you found any other undocumented button combinations for the Gamecube version? Community rumors persist about a code to unlock the "BMW M3 GTR" from Most Wanted, but after testing all 256 D-Pad combinations, that car remains exclusive to the Collector’s Edition disc only.
Now load up your Gamecube, enter these codes, and take back Palmont City. The canyon is waiting.
Need for Speed: Carbon (2006) delivered a thrilling street racing experience centered on intense canyon duels and crew-based tactics. On the Nintendo GameCube, players could access a variety of cheat codes to unlock cars, alter gameplay, or simply enjoy the game with fewer restrictions. Unlike modern microtransactions, these cheats were Easter eggs left by developers—free, optional, and designed to enhance replayability.
Unlike modern games where cheats are entered in a specific menu, Need for Speed: Carbon requires you to enter button combinations at the (the "Press Start" screen before the main menu).
Early versions of Need For Speed Carbon have a bug with the official Nintendo Memory Card 59.