Board Thread:General Discussion/@comment-5703889-20130904144807/@comment-4700359-20130905000329

Get it into a battle in which you're sure it'll gain enough exp. to level up. Before it levels up, use 6 X Attacks and 6 X Defends on it. Once it levels up after that (in the same battle, of course), it'll evolve into Hitmontop. Now, I'm not sure if it'll work with fewer than 6 of each, but I do know it doesn't work with just 1 of each.