Complete the required task to unlock each car.

Car	Task
Aero Car	Upgrade Sonic Car to 55%.
Banana Car	Win the Chimp Island GP.
Buggy	Upgrade Roadster to 25%.
Cigar Car	Upgrade Dragster to 55%.
Dragster	Win the Snowville GP.
Duck Car	Complete the Autoburg Sponsorship.
Kairo Car	Win the Kairo Island GP.
Mach Car	Upgrade both Spiral Car and Aero Car to 55%.
Proto Car	Upgrade Buggy to 55%.
SL Car	Complete the Kairo Insurance Sponsorship.
Sonic Car	Upgrade Wing Car to 55%.
Spiral Car	Upgrade Cigar Car to 55%.
Super Car	Upgrade Proto Car to 55%.
Wing Car	Win the Japan GP.