Don't speak too soon, Phantom
Venomous Sting
Vespiquen @Leftovers
Nature: Bold
EVs: 252 HP/ 104 Spdef / 100 Def / 46 SpAtk
Ability: Pressure
Toxic
Venoshock
Roost
Swagger/Protect
This Vespiquen is a Toxic Staller with Venoshock. When the pokemon is poisoned, Vespiquen can use Venoshock to deal a ton of damage. Roost heals off the damage Vespiquen receives while setting up a Toxic. Swagger is used against Steel and Poison types, who are unaffected by Toxic. If you think Steel and Poison types won't be a problem, then you can substitute Swagger for Protect instead for more Toxic stall.