I've been quite successful with this team on PS, if you have any suggestions, post it as an answer.
Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Soft-Boiled
- Moonblast
- Thunder Wave
- Flamethrower
Dub-a-Scrub (Rotom-Wash) @ Leftovers
Ability: Levitate
EVs: 248 HP / 208 Def / 52 Spe
Bold Nature
- Volt Switch
- Hydro Pump
- Will-O-Wisp
- Pain Split
Talonflame @ Leftovers
Ability: Gale Wings
EVs: 248 HP / 252 SpD / 8 Spe
Careful Nature
- Will-O-Wisp
- Brave Bird
- Roost
- Taunt
Venusaur-Mega @ Venusaurite
Ability: Overgrow
Shiny: Yes
EVs: 248 HP / 96 Def / 144 SpD / 20 Spe
Bold Nature
- Leech Seed
- Giga Drain
- Sludge Bomb
- Synthesis
Skarmory @ Shed Shell
Ability: Sturdy
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Whirlwind
- Iron Head
- Roost
- Defog
Tyranitar @ Chople Berry
Ability: Sand Stream
EVs: 248 HP / 252 Atk / 8 SpA
Brave Nature
- Pursuit
- Ice Beam
- Stone Edge
- Stealth Rock
Ha, I guess I should explain how this team works. It's based around M-Venu, I've added a Sp Def talon to Take on Mega Zard Y and take on Rotom-W as well as other M-Venusaur. Clefable is there to setup a win condition and check Mega Zard X and Mega Mane/Conk, etc. Rotom-W is there to tank hits and gain momentum with volt switch, a situation I like to force is volt switch on a lati@s switch and go into TTar and kill it for mega Venu. Venusaur is there to tank hits for ever and be a nice win con with a combo of leech seed+synthesis. Skarm is there to take on specifically Mega Diance and Mega Gard, both are very threatening to my team. It's holding a shed shell to not get trapped by magnezone, which is commonly on teams with Dinace and Gardevior. Last I have TTar, I like this set because it can tank a mega lop hjk and set up rocks. As well as trapping lati@s and Starmie/Gengar, both being difficult for my team to handle.
