Set a record lap time one any track. Then, enter one of the following names at the lap record entry screen to activate the corresponding cheat function:
Enter "TEAMPEEP" as a lap record name.All Grand Prix Challenges
Enter "IMHRACING" as a lap record name.Ace difficulty setting
Enter "REDJOCKS" as a lap record name. Alternately, successfully complete championship mode to unlock the "Ace" difficulty setting.