Latios

Latios resides in a great Speed tier, allowing it to outspeed and check many threats such as Garchomp and Keldeo. In addition, it has a great Special Attack stat, coupled with an extremely strong move in Draco Meteor, making it a great sweeper. It is versatile in the roles it fulfills because it has tons of utility and support moves in its arsenal such as Memento, Tailwind, and Defog and doubles as one of the best offensive Defog users in OU. Furthermore, a decent defensive typing allows Latios to comfortably absorb hits from the likes of Mega Charizard Y and Keldeo and, as a result, gives it ample opportunities to switch in. However, Latios is weak to the ubiquitous Knock Off and Pursuit, which is amplified by the increase of Pursuit users such as Tyranitar and Steel-types such as Mega Metagross. Latios also resides in a crowded Speed tier and thus has to rely on Speed ties with opposing base 110s such as Mega Diancie and Gengar. Finally, it has underwhelming bulk, rendering it open to revenge killers and faster Pokemon such as Talonflame and Tornadus-T.