Pinsir

Mega Pinsir is a powerful offensive threat with a high Attack stat that can be furthered by Swords Dance as well as Aerilate, which powers up its Normal-type moves and turns them into secondary STAB moves. Mega Pinsir's access to an Aerilate-boosted Quick Attack means that it is capable of outright OHKOing certain faster attackers, and with new additions to the metagame such as Mega Lopunny, Mega Sceptile, Mega Beedrill, and Mega Gallade, things have only gotten better for Mega Pinsir. Additionally, Mega Pinsir's decent bulk means that it doesn't find setting up too difficult. However, Pinsir is weak to Stealth Rock, especially after Mega Evolving, and it is shut down by burns and paralysis. Finally, a multitude of common threats, such as Talonflame, Rotom-W, Thundurus, Skarmory, Landorus-T, and Zapdos, are highly problematic for it.