FIRE/GRASS/WATER Core
Water Core:
Azzumaril / Manhapy / Keldeo
Fire Core:
volcarona / Victini / Infernape / Charizard X (Also sweeper)
Grass Core:
Superior / Ferathorn / Shaymin

Mega Pokemon:
mega heracross / Sweeper, swords dance set.
Charizard X / Dragon Dance, sweeper.

Sweepers:
Salamance / Decently Fast, dragon dance, Flyium z not much can take it
Kartana / Amazing atack stat, swords dance, Decently fast
Reuniclus / Calm mind set, Good coverage, Focus blast for steel/dark types, Magic guard
Charizard x


Walls:
Physical Walls:
Cloyster / Spikes / Spinner
Bronzong / Mixed Wall / Rocks
Hippowdon / Rocks
Skarmory / Rocks / Defog
Dusknoir
Special Walls:
Suicune
Blissey
Tangrowth
Leafon
Probopass / (Under sand)