The Lake Trio easily, mostly because if anything managed to touch Azelf it would become a statue. Hitting Azelf causes it to take away your willpower. So basically you just stand there, possibly fall over, and wait until you suffocate of not having the strength to inhale.
Sounds hardcore. But it's Pokemans.
Originally posted by Demonic Phoenix
Meh, Azelf would solo FF7 by himself. Controlling someone's will is hax.
I've never seen this ability shown and the Pokedex isn't helpful either.
So if it can, we still don't know how many it can control at once and why Chaos Vincent can't use Toad and then shoot it.