Defensive Protect + Toxic

Toxtricity-Low-Key @ Black Sludge
Ability: Punk Rock
EVs: 52 HP / 212 Def / 68 SpA / 176 Spe
Bold Nature
IVs: 0 Atk
- Toxic
- Protect
- Taunt
- Volt Switch
When you are facing a toxtricity you are forced to assume the worst case scenario, this defensive set aims to take advantage of that and rack maximum chip damage with a toxic that ALWAYS hits, once your facade is over you still have taunt to prevent being turned into set up fodder and a volt switch that allows you to escape toxic immune targets like celesteela and scizor.
With this defensive spread you can take on a +1 gyarados even after rocks (assuming they lack earthquake).
It also has enough speed for max spe, adamant scizor and obviously everything below it (AKA Azu, Crawdaunt, Conk)

Toxtricity-Low-Key @ Black Sludge
Ability: Punk Rock
EVs: 52 HP / 212 Def / 68 SpA / 176 Spe
Bold Nature
IVs: 0 Atk
- Toxic
- Protect
- Taunt
- Volt Switch
When you are facing a toxtricity you are forced to assume the worst case scenario, this defensive set aims to take advantage of that and rack maximum chip damage with a toxic that ALWAYS hits, once your facade is over you still have taunt to prevent being turned into set up fodder and a volt switch that allows you to escape toxic immune targets like celesteela and scizor.
With this defensive spread you can take on a +1 gyarados even after rocks (assuming they lack earthquake).
It also has enough speed for max spe, adamant scizor and obviously everything below it (AKA Azu, Crawdaunt, Conk)