Tyranitar @ Assault Vest
Ability: Sand Stream
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Pursuit
- Crunch
- Earthquake
- Stone Edge / Ice Punch / Whatever you want
Standard & very customizable Assault Vest Tyranitar. Fully investing on Special Defense showcases monstrosity of surviving two Moonblast from Choice Specs Tapu Lele and two Focus Blast from bulky Mega Gengar (who uses that lol).
Sadly even if Blacephalon carries Choice Specs + HP Grass CT it doesn't even come close to 2HKOing this Tyranitar and Tyranitar guarantees its removal with Pursuit. Also I don't feel like I have to mention how useful Tyranitar is outsides outsides checking Blacephalon; it basically handles most special attackers, with the most prominent one being Naganadel and Mega Charizard Y.
Finally, the presence of Tyranitar as a top-tier threat in the metagame hurts Blacephalon's viability, since it's unable to 2HKO Tyranitar on the switch without prior damage and falls prey to Pursuit.
- OU Blacephalon Analysis
Honestly I don't understand what counters Blacephalon better than Tyranitar, I am not trying to sound rude.