Is mienshao OU or UU?

Question

It is in the UU list on smogon, but it's page says that it is OU, so which is it?

Answer 1

It's UU.
Smogon originally had it as OU, but it moved down to UU. Recall that you can use lower tiered Pokemon in a higher tier. Ninjask is in NU but used in OU. Same thing here. Smogon originally had it as OU, and it moved to UU, so it can still be used in OU. Smogon never bothered to write a UU profile. That's all.