No but on the wii you can.
You can't unlock Mii outfit C.
To Unlock Mii in Mario Kart you have to come 1st in the 100cc Special Cup. Or to Unlock the Other Outfit for the Mii you can unlock all 32 Expert Staff Ghosts.
Mii outfit C is not real. So, obviously, you can't unlock it.
To unlock mii outfit A, you need to get a gold trophy in the 100cc special cup. To unlock mii outfit B, you need to unlock expert staff ghost data records in all 32 courses.
There isn't a Mii Outfit C.
you need to unlock mii outfit a. and b although miioutfit b is just you mii in overalls
there is no mii outfit c.
Ok well I can't rember what outfit you where when you do this but to unlock your mii you need to win the 100cc speacil cup.NOTE:when you do multiplayer more then one person can be their mii!Have fun with this!!!
To unlock the Miis: Mii Outfit A: Complete the 100cc Special Cup Mii Outfit B: Unlock all 32 Expert Staff Ghosts.
you have to have gold in all the cups to unlock it :)
its alredy unlocked just use a mii that's small!