How do you unlock rosalina on Mario kart wii 50cc?
You can't do it on 50cc. Get one star rank or better on ALL Mirror Mode cups.
Have a Super Mario Galaxy 1 account, do a couple of races , and you should have her.
First of it's not "Rozolina" it's "Rosalina". Sorry I just had to correct that. Anyway to unlock Rosalina in Mario Kart Wii, you have to : Get a "One Star" rank or better in the Wii Cup Series. Alternately, have a saved game file from Super Mario Galaxy and win a few grand pix races. Hope this helped :)