Pinsir

Mega Pinsir carves out a niche in OU as a dangerous wallbreaker thanks to its sky-high Attack, access to Swords Dance, and amazing ability in Aerilate. Its Aerilate-boosted Quick Attack lets Mega Pinsir act as an effective revenge killer and pick off faster Pokemon such as Quiver Dance-boosted Volcarona, Mega Lopunny, Hawlucha, and Serperior. Its Speed tier lets it stand out compared to other wallbreakers such as Mega Medicham, Mega Mawile, and Mega Charizard X. However, Mega Pinsir lacks any form of reliable recovery, and its typing leaves it a liability, as it is vulnerable to Stealth Rock, especially after Mega Evolving. It also struggles against common Pokemon such as Zapdos, Tapu Koko, and Rotom-W, as they can take advantage of Mega Pinsir's typing and threaten it with their STAB moves. Mega Pinsir can't fit all of its coverage moves at once to hit them super effectively. Despite Mega Pinsir's Speed tier, it is outpaced by common Pokemon such as Tornadus-T and Ash-Greninja. Thanks to these factors, Mega Pinsir needs a lot of support, especially entry hazard removal, to utilize its full potential and faces competition from other wallbreakers such as Mega Medicham, Mega Mawile, and Mega Charizard X.