Definitely the Wobbuffet. Wynaut's Defenses are too low for Eviolite. It'd barely live a hit, and Wobbuffet just might live two. Even if it doesn't, it'll certainly survive an attack that isn't super effective, I'm guessing maybe even STAB Earthquake from some, but I might be out of my mind there, I can't run damage calcs. Either way it'll give a guaranteed kill if Lvl. 100 and EV trained in HP, and it survives. No Pokemon as much more than 700 health. So, we can say Wobuffet is better, although I hate Wobbuffet.