Enter SPEEDY as a name in championship mode, then return to the main menu.
All Cars:
Enter ACO as a name in championship mode, then return to the main menu.
All Championships:
Enter NUMBAT as a name in championship mode, then return to the main menu.
View Credits:
Enter HEINEY as a name in championship mode, then return to the main menu.
Unknown:
Enter WOMBAT as a name in championship mode, then return to the main menu.