Blissey (F) @ Heavy-Duty Boots
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 SpD
Calm Nature
IVs: 0 Atk / 25 Spe
- Seismic Toss
- Soft-Boiled
- Toxic
- Teleport

Skarmory @ Rocky Helmet
Ability: Dauntless Shield
EVs: 252 HP / 252 Def / 4 Spe
Impish Nature
IVs: 0 Atk
- Body Press
- Iron Defense
- Roost
- Spikes

Mew @ Choice Scarf
Ability: Regenerator
EVs: 248 HP / 104 Def / 156 Spe
Impish Nature
- Flip Turn
- Defog
- Trick
- Gunk Shot

SkarmBliss + Regen Mew

This is a defensive core I have been using on some hazard-stack builds that I find to be pretty effective. Blissey is the special sponge of the team, handling most every special-attacker in the tier that is not a ghost-type. Skarmory is the physical sponge of the team, and can pressure the opponent with Spikes & ID + BPress. Mew is the pivot and secondary physical wall, and is also your emergency Koko removal. Mew is especially nice for scouting your opponent if you don't want to go into Skarmory, as it can recover everything off with Regenerator. The moves on Mew are pretty optional and can be tailored to whatever your team needs. I recommend pairing this core with something that can check Ghost-types, as well as some Pokemon that benefit from Spikes.

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