Piloswine @ Eviolite  
Ability: Thick Fat  
EVs: 252 HP / 192 Def / 64 SpD  
Impish Nature  
- Stealth Rock  
- Toxic / Yawn 
- Rock Tomb / Ice Shard
- Earthquake

Role:
Mixed tank, rocks setter, status spreading swine.

Set:
This. Thing. For real. As someone who played Monotype for 5 years now, I can say that Piloswine is an amazing tank to play around with. With 154 inherited SpD from lugia or Ho-oh, this thing can live a lot of hits while dealing decent damage in return. Stealth rocks for hazards, toxic to spread poison. Yawn is fun to play around with while rocks are up. But that's just a niche pick. Toxic is preferred. Rock Tomb for some damage but really just to lower the opponent's speed. Ice Shard to finish off low health opponents with priority. Earthquake for stab. Max HP. 64 SpD to live two Boombursts from 154 SpA Specs Swellow (also overheat from pdon with 212+ SpA does less than 50% now) Stay away from Kartana though! 

Calcs (defensive)
252 SpA Choice Specs Swellow Boomburst vs. 252 HP / 64 SpD Eviolite Piloswine: 169-201 (41.8 - 49.7%) -- guaranteed 3HKO (Inherited 154 SpA)
252 Atk Victini V-create vs. 252 HP / 188+ Def Eviolite Thick Fat Piloswine: 194-230 (48 - 56.9%) -- 90.6% chance to 2HKO (Inherited 150 Attack)
252+ Atk Groudon-Primal Precipice Blades vs. 252 HP / 188+ Def Eviolite Piloswine: 163-193 (40.3 - 47.7%) -- guaranteed 3HKO
252 SpA Life Orb Turboblaze Kyurem-White Fusion Flare vs. 252 HP / 64 SpD Eviolite Piloswine: 153-182 (37.8 - 45%) -- guaranteed 3HKO
212+ SpA Groudon-Primal Overheat vs. 252 HP / 64 SpD Eviolite Thick Fat Piloswine in Harsh Sunshine: 168-200 (41.5 - 49.5%) -- guaranteed 3HKO
252 SpA Life Orb Sheer Force Nidoking Earth Power vs. 252 HP / 64 SpD Eviolite Piloswine: 125-148 (30.9 - 36.6%) -- 62.2% chance to 3HKO (154 Inherited SpA)
252 Atk Mold Breaker Excadrill Iron Head vs. 252 HP / 188+ Def Eviolite Piloswine: 158-188 (39.1 - 46.5%) -- guaranteed 3HKO
You get the point haha

Calcs (Offensive)
4 Atk Piloswine Earthquake vs. 0 HP / 0 Def Groudon-Primal: 144-170 (42.2 - 49.8%) -- guaranteed 3HKO
4 Atk Piloswine Ice Shard vs. 0 HP / 4 Def Swellow: 132-156 (50.5 - 59.7%) -- guaranteed 2HKO
4 Atk Piloswine Earthquake vs. 0 HP / 4 Def Tapu Koko: 248-294 (88.2 - 104.6%) -- 31.3% chance to OHKO (Ice Shard KOs next turn)
4 Atk Piloswine Earthquake vs. 248 HP / 0 Def Marowak-Alola: 200-236 (61.9 - 73%) -- guaranteed 2HKO (Inherited 150 attack, 25% to OHKO after Flare Blitz recoil damage)
4 Atk Piloswine Earthquake vs. 0 HP / 0 Def Nidoking: 270-318 (89.1 - 104.9%) -- 25% chance to OHKO