Ah, Theorymon's huge ass post! Zoroark might actually become a pretty great niche mon, getting the boost from Yveltal. It's be obvious, though, so maybe it's not as great. Dark type moves are pretty uncommon, but with this, I can see special attacking Pokémon, such as Thundurus running Dark Pulse for pretty good neutral coverage while gaining the boost from the weather. About the second point, would Rayquaza's Air Lock cancel the effect? Because if not, I would fear Crunches comming from that beast. And Zekrom! 150 Attack is no push-over, especially with 50% extra damage.