Kyogre

Kyogre has been a defining part of Ubers since its fateful release, and this generation is no exception. With its metagame-shifting ability Drizzle, base 150 Special Attack, and very good bulk even by Ubers standards, it's no wonder that Kyogre continues to be one of the most common, if not the most common, Pokemon in the metagame. With STAB on its Water-type moves, and the additional boost due to the automatic rain, its power reaches truly monstrous levels. In fact, thanks to Drizzle, Kyogre's Water Spout is the strongest immediate, non-recoil attack in the game. Because of its sheer power, there are very few reliable switch-ins to this whale; Latias, Latios, and Arceus-Grass being just about all that can muster the willpower to do so.

Kyogre's stats and abilities also make it a terrific team player. The rain that it sets up is helpful to a wide variety of Pokemon in Ubers, notably Steel-types, Water-types, and Thunder users. It also helps to neuter Reshiram's otherwise nuclear Blue Flare.

Nonetheless, Kyogre has its fair share of checks and revenge killers. Zekrom is one of the most prominent of these, hitting Kyogre hard with its physical Electric-type STAB move, Bolt Strike. Ferrothorn and Gastrodon cause similar problems, the former being able to avoid a 2HKO from sets lacking Choice Specs, and the latter being immune to Kyogre's STAB moves altogether. In addition, Kyogre still has its old foes from the previous generations, such as Palkia and Shaymin-S. Despite all this, Kyogre is definitely one of the best Pokemon in the game, and is difficult not to put into an Uber team.