Azumarill

Azumarill is a great wallbreaker thanks primarily to Huge Power, which doubles its Attack stat. Its Water/Fairy typing along with decent bulk allows it to threaten Fire-, Fighting-, Water-, Dark-, and Ground-types such as Blaziken, Mega Gyarados, and Mamoswine. Access to coverage in Superpower and Knock Off as well as priority in Aqua Jet also makes Azumarill difficult to reliably switch into.

Unfortunately for Azumarill, as a physical attacker, it is weakened by burns and Intimidate, the latter of which is especially troubling for non-Belly Drum sets. Tapu Lele's omnipresence prevents Azumarill from taking advantage of Aqua Jet to KO faster foes, leaving it vulnerable to common Electric- and Grass-types such as Tapu Koko, Ferrothorn, Thundurus-T, and Mega Venusaur, most of which can outspeed it due to Azumarill's pathetic Speed. It is also rather predictable, as Azumarill has few viable options, leaving it open to being played around more easily.

Below are some sample sets. These sets are likely to be standard, but they will be expanded upon and updated as the metagame progresses.