Ive been using a defensive core of Florges and M-Aggron recently to some pretty good success
Florges (F) @ Leftovers
Ability: Flower Veil
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Aromatherapy
- Toxic
- Wish
- Moonblast
Aggron @ Aggronite
Ability: Sturdy
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Rest
- Heavy Slam
- Stone Edge
- Earthquake
Aggron resists/immunity to the steel/poison hits that are going to be aimed at Florges and barely gets scratched by any physical moves they will try to throw at Florges. Florges does the same for aggron, and carries Aromatherapy for when aggron needs to take a nap
Florges (F) @ Leftovers
Ability: Flower Veil
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Aromatherapy
- Toxic
- Wish
- Moonblast
Aggron @ Aggronite
Ability: Sturdy
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Rest
- Heavy Slam
- Stone Edge
- Earthquake
Aggron resists/immunity to the steel/poison hits that are going to be aimed at Florges and barely gets scratched by any physical moves they will try to throw at Florges. Florges does the same for aggron, and carries Aromatherapy for when aggron needs to take a nap