http://pokepast.es/268765b2003a23db
http://pokepast.es/c8d8f4ebf93572ca
http://pokepast.es/7de5045809354e78

I finished teams with the new megas :) Gardevoir is a decent wallbreaker Tapu fini traps
I put mega Lopunny with Marshadow because the Fighting coverage is amazing, and the ghost coverage on marshadow , I combined Tapu Koko to strengthen thunder punch on mega lopunny
252 Atk Lopunny-Mega Thunder Punch vs. 252 HP / 192+ Def Toxapex in Electric Terrain: 142-168 (46.7 - 55.2%) -- 99.6% chance to 2HKO after Stealth Rock and Black Sludge recovery
Whirlpool Tapu Fini is for trapping mons like heatran Landorus, Garchomp.
Dual status rotom wash allows me toxic stuff like tangrowth but also burn things like celesteela.
Gallade + Tapu Bulu sounded really good to me because of the fact that grassy terrain strengthens Leaf Blade, which hits Tapu Fini harder than Zen Headbutt, and wears down a lot of common mons.
252 Atk Gallade-Mega Leaf Blade vs. 248 HP / 8 Def Tapu Fini in Grassy Terrain: 312-368 (90.9 - 107.2%) -- guaranteed OHKO after Stealth Rock

Gardevoir + Celesteela + Zygarde I felt was a really solid core :) Enjoy the squads :]