Ok, so I based this team for double battles.
Slowking
Item: Leftovers/Shed Shell
Ability: Regenerator
Nature:Sassy
Evs: 252 Sp.Def. 252 Def
Moveset:
Heal Pulse
Light Screen/Trick Room
Psych Up
Psychic/Trick Room
Ferrothorn
Item: Rugged Helmet/Big Root
Ability: Iron Barbs
Nature: Hardy
Evs...