I think the general consensus points to this being Pinsir's standard set
Pinsir @ Pinsirite (M)
Ability: Hyper Cutter/Moxie/Mold Breaker
EV's: 252 Attack/ 252 Speed
Jolly Nature
- Quick Attack
- Return
- Earthquake
- Swords Dance
***
Close Combat is niche because it would only be hitting Rotom-W, Skarmory, and Bronzong for better damage. Also with CC, you're reducing Pinsir's natural physical bulkiness while amplifying his special weakness. Don't get me wrong, CC isn't bad, but it's very situational. Skarmory/Rotom Calcs are already in thread. Bronzong is below. BZ can 2shot Mega Pinsir with Rock Slide, Also he can setup reflect on the first turn if running a Dual Screens Set.
+2 252 Atk Aerilate Mega Pinsir Return vs. 252 HP / 252+ Def Bronzong: 161-189 (47.6 - 55.9%) -- 25% chance to 2HKO after Leftovers recovery
+2 252 Atk Mega Pinsir Close Combat vs. 252 HP / 252+ Def Bronzong: 193-228 (57.1 - 67.4%) -- guaranteed 2HKO
+2 252 Atk Mega Pinsir Close Combat vs. 252 HP / 252+ Def Bronzong through Reflect: 96-114 (28.4 - 33.7%) -- 0.3% chance to 3HKO
+2 252 Atk Aerilate Mega Pinsir Return vs. 252 HP / 252+ Def Bronzong through Reflect: 80-94 (23.6 - 27.8%) -- 89.9% chance to 4HKO