It's one of the reward unlocks for Genki bowl. I'm not sure if you get it after beating all the Genki escort ones, or if it's at the end itself when you finally beat all the Sad Panda Skyblazing stuff.
Well, I meant more as a cheat, actually, LOL. But I'll try and complete the Genki stuff. Never all that good at driving., though.
Thanks, anyway!