Latios

Latios is one of the most powerful Pokemon in the AAA metagame. With a great offensive and defensive typing in Dragon / Psychic, it can be almost impossible to switch into due to its access to powerful moves in Draco Meteor and Psyshock and power-boosting abilities in Adaptability and Tinted Lens to further complement its fantastic wallbreaking prowess. Not only is it one of the best wallbreakers in the metagame, but it also has the ability to sweep thanks to its access to Calm Mind and Roost coupled with a fantastic Speed tier to outspeed the majority of the unboosted metagame. However, due to its low Defense, Latios can usually be OHKOed by common priority users with Refrigerate or Gale Wings such as Entei, Thundurus, Skarmory, and Staraptor. Latios is also forced to switch out often due to the Special Attack drop from Draco Meteor, so it can be trapped by potential Pursuit users such as Honchkrow and Mega Metagross.