Speed Kings Cheat Codes for Gamecube

Unlock All tracks
Earn gold medals in every event.

Unlock Grand Prix Mode
Beat the best record in Time Attack mode.

Cheatcodes
Enter the following phrases as your name before beginning to activate the cheats:

18 Best laps - .lapt18
All driving tests finished - .test9
All meets won - .meet6
Finish Grand Prix Mode - .prix
Respect Points - .prix[number]