if you're talking about Miis, i gave no idea, Ive never tested a game that needs it but i hear its common, im gonna rip my wii sports to see cause i don't know 
Edit: ok i actually booted it up from the dvd and it seems they do work i used a Mii stored in mi wiimote and the eyes and mouth do show on my character.
Edit: ok i actually booted it up from the dvd and it seems they do work
i used a Mii stored in mi wiimote and the eyes and mouth do show on my character.
My Specs: AMD Phenom II x4 940 3.0ghz - w7/Ubuntu 11.04