Thanks for the tip. Meanwhile Im almost done breeding a Victreebel with Giga and Weather Ball, so I might try that first.You can always ask in the WiFi forum (simple requests thread) if someone can trade you a Charizardite Y. There's a bunch of guys there that can clone stuff, and if you can breed some good stuff (pref. with egg moves) or have some nice hidden ability mons/some females in apricorn balls or w/e it shouldn't be too hard to trade for one.
If you can get Charizardite Y, you should be all set with one of your Entei teams (probably the Gallade team because the faster your partners are, the better, and it's an all-out attacker so no need to worry about it spamming sunny day or so)