Small head mode
Enter PINHEAD as a code.
Mirror Mode
Enter YADAYADA as a code.
Night Mode
Type "MIDNIGHT" at the cheat code entry.
Unlock Soccer
Finish 1st in the Silver Round of the Novice Season.
Unlock Hill Climb
Finish 1st in the Gold Round of the Amateur Season.
Big Head mode
Enter BLAHBLAH at the cheat menu
Stunt Bonus
Enter SHOWOFF at the cheat menu.
Unlock NES Excitebike
Finish the Tutorial Mode by completing all the stunts.
Unlock 3D NES Excitebike
Finish 1st in the Challenge Round of Pro Season.
Turn all riders invisible
Enter INVISRIDER at the cheat menu.
Back to Nintendo 64