(Basically designed to get up Sticky Web. Infestation works well to damage almost anything, and traps in problematic Espeon and Deoxys leads)
Skarmory @ Leftovers Ability: Sturdy EVs: 252 HP / 232 Def / 24 Spd Impish Nature - Roost - Brave Bird - Stealth Rock - Whirlwind
(My physical wall, and primary answer to Mega Kang, if it isn't packing Fire Punch. Sets up the Rocks, WW's away problematic stat boosters, etc)
Greninja @ Expert Belt Ability: Protean EVs: 4 Atk / 252 SAtk / 252 Spd Hasty Nature - Hydro Pump - Ice Beam - Dark Pulse - Toxic
(Dunno why I have 4 ATK EV's, I'll switch that up. Expert Belt is perfect as it basically gives me massively powerful STAB whenever. Toxic is there mainly to hit things I can't with these 3 moves. Might switch it out for HP Fire or HP Fighting)
(My Mega of choice. I love its tanky nature and it isn't as Overused as the others. Once mega evolved, it only has two weaknesses to worry about. Also, it can help to stop problematic B-Tree and Gourgeist)
Garchomp @ Choice Scarf Ability: Rough Skin EVs: 4 HP / 252 Atk / 252 Spd Jolly Nature - Dragon Claw - Earthquake - Stone Edge - Outrage
(Revenge Killer extraordinaire. Fairy types are dealt with easily by my Venusaur, so I tend not to worry about them too much. Pretty standard, and with Sticky Webs on the field it basically outspeeds all land-based things)
Chandelure @ Air Balloon Ability: Flash Fire EVs: 252 HP / 252 SDef Calm Nature - Fire Blast - Energy Ball - Shadow Ball - Substitute
(I have a Fire weakness on this team, so this was going to be my answer to that. It's worked pretty well, with prediction it gets Flash Fire easily. Works as a spin-blocker as well, and with the Balloon it actually proves a great counter to Excadrill and whatnot)
This team has a huge glaring weakness to Blissey/Chansey. I've experimented with having an Infernape instead of Galvantula, but I really miss the Sticky Webs support. I've also thought of doing a Choice Band Terrakion instead of Chandelure, but then I don't even have a spin blocker.
Why does Greninja have Toxic? It literally does nothing for it. If you want it to spread the Toxic status, it has Toxic Spikes to do that with, but really, it has better things to do than set up hazards. You're better off replacing Toxic with U-turn to scout as it's stupid fast and will probably switch out first (unless the opponent has a Noivern, Jolteon, or Crobat). You also won't have to fix its EVs because you'll want those for U-turn.
I did have on U-Turn for awhile for sure. I think I put Toxic on it as there was a couple times I've had Chansey come in on it and that was the only way I could do damage. But U-Turn is better for sure.