Why does everyone fear Ghetsis' Hydreigon? Meinshao generally outspeeds and OHKO's it with HJK. Hell, Meinshao basically destroys Ghetsis by itself bar his lead Cofagrigus. You can get Meinfoo at level 41 right there at Victory Road, and then it's just a miniscule amount of grinding til HJK destruction.
Now that I think of it, Meinshao absolutely destroys N as well. Amazing late-game'ish Pokemon imo.