Something bugs me about Zygarde, even though he's one of the coolest guys in this generation. The thing is, with Aura break he's clearly supposed to counter X-Deer and Y-Bird, but his typing means both are immune to one of his main attacks, and Xerneas is actually super effective against him.

Now, Zygarde is supposed to by a land snake shaped like the letter "Z", so my proposed solution would be to simply change his typing to Rock/Poison. Now he resists Oblivion Wing and Moonblast,and Land's Wrath could simply be a rock move. He would still be a land snake since snakes are typically poisonous and rock makes just as much sense here as ground. Would this push him into ubers with his brothers or would he still be a cut below them?

Also, Zygarde general, I guess.