Aerodactyl

Mega Aerodactyl has cemented itself as a terrifying offensive threat in the OU metagame for a variety of reasons. One of the most important aspects is its blistering Speed tier, outspeeding the majority of the metagame, including speedy threats such as Alakazam, Mega Manectric, Mega Lopunny, and Tornadus-T. Combine this with its decent Attack stat and its broad movepool, with the majority of its moves being further bolstered by Tough Claws, and Mega Aerodactyl is able to serve as an incredible revenge killer and late-game cleaner. Adding onto these positive traits, it is able to check a vast array of threats such as Tornadus-T, Talonflame, Mega Pinsir, Mega Charizard X, and Volcarona as a result of its decent bulk and valuable defensive typing.

Sadly, Mega Aerodactyl's weakness to the common Stealth Rock limits the number of times it is able to switch in if lacking Roost. Furthermore, even though its typing is decent, it has troublesome weaknesses to common priority moves in Aqua Jet, Ice Shard, and Bullet Punch. Mega Aerodactyl also has issues breaking through defensively-oriented teams, as the prevalence of bulky Garchomp, Slowbro, and Clefable can make its life miserable.