No damage:
Enter !DAMAGE! as your name. Your can will never be damaged.

Choose number of competitors:
Enter NPLAYERS as your name . From the main menu, go to the track select screen. After a track is selected, you will be able to choose the number of competitors.

Monastery Ruins bonus track:
Enter REFLECT! as a name in a Wreckin' Race-Championship. When the main menu returns change the race to Wreckin' Race-Practice. Monastery Ruins can now be selected as a course. This track is normally rewarded for finishing first in the season.

Ridge Racer-like track:
Enter RIDGERACER as your name in a two-player game.