Cofagrigus @ Icium Z
Ability: Mummy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Hidden Power [Ice]
- Will-O-Wisp / Toxic
- Haze
- Destiny Bond / Pain Split
Cofagrigus works great against MegaMence thanks to Mummy, being able to make it lose its most reliable STAB. Will-O-Wisp lets Cofagrigus be able to cripple Dragon Dance sets, while Toxic can be used to beat bulkier sets and give it an easier time against Salamences that carry Roost. Haze is used to remove any Dragon Dance boosts, so Cofagrigus can survive longer, and provides a good recovery option with Z-Haze. Hidden Power Ice lets Cofagrigus be able to actually deal damage against Salamence, 2HKOing the standard Dragon Dance and Mixed sets. Finally, Destiny Bond can take out Salamence if things look grim, as well as potentially nabbing another KO when Cofagrigus's time is up, while Pain Split gives Cofagrigus another way to restore health. This set works better against the Dragon Dance set because of Mummy, since it gets 2HKOed by Draco Meteor on the Mixed set.
Dragon Dance
252+ Atk Aerilate Mega Salamence Double-Edge vs. 252 HP / 252+ Def Cofagrigus: 82-97 (49.6 - 58.7%) -- 98.4% chance to 2HKO
+1 252+ Atk Aerilate Mega Salamence Double-Edge vs. 252 HP / 252+ Def Cofagrigus: 123-145 (74.5 - 87.8%) -- guaranteed 2HKO
+1 252+ Atk Mega Salamence Earthquake vs. 252 HP / 252+ Def Cofagrigus: 57-68 (34.5 - 41.2%) -- guaranteed 3HKO
+2 252+ Atk Mega Salamence Earthquake vs. 252 HP / 252+ Def Cofagrigus: 76-90 (46 - 54.5%) -- 57.8% chance to 2HKO
Mixed Mence
252+ SpA Mega Salamence Draco Meteor vs. 252 HP / 0 SpD Cofagrigus: 111-132 (67.2 - 80%) -- guaranteed 2HKO
252+ SpA Mega Salamence Fire Blast vs. 252 HP / 0 SpD Cofagrigus: 63-75 (38.1 - 45.4%) -- guaranteed 3HKO
4 Atk Aerilate Mega Salamence Double-Edge vs. 252 HP / 252+ Def Cofagrigus: 63-75 (38.1 - 45.4%) -- guaranteed 3HKO
252+ SpA Aerilate Mega Salamence Hyper Voice vs. 252 HP / 0 SpD Cofagrigus: 93-109 (56.3 - 66%) -- guaranteed 2HKO
4 SpA Cofagrigus Hidden Power Ice vs. 4 HP / 0 SpD Mega Salamence: 96-116 (56.1 - 67.8%) -- guaranteed 2HKO
This works best against Salamence, but I could see it being potentially useful against other physical sweepers such as Excadrill and Kartana thanks to the annoying combination of Haze + Will-O-Wisp + Mummy.