Audino

Mega Audino is one of the bulkiest Pokemon in the tier, which, in combination with its unique defensive typing, makes it almost impossible to take down quickly. It is also the only viable Wish user available because of these traits, completely outclassing other potential users. Regenerator in particular allows it to pivot very effectively in the early-game to support teammates, especially in combination with other support moves such as Heal Bell and Encore, without being worn down unless Mega Evolving is necessary. Mega Audino's bulk and vast movepool allow it to fill a number of roles effectively, making it not only an excellent cleric but also a defensive wincon with Calm Mind or even an offensive lure and pivot using its wide special coverage. Its Fairy typing and lack of removable item also make it the most reliable switch-in to Knock Off and Trick throughout the match, a highly useful attribute for defensive teams. This also allows it to deal with most Dark-, Dragon-, and Fighting-types well, such as Shiftry, Sliggoo, and Hariyama, provided it doesn't attempt to switch into the latter's STAB attacks before Mega Evolving.

While Mega Audino has a large number of unique and highly useful attributes, its lack of immediate offensive power and speed can make it easy to exploit depending on its moveset. Setup sweepers can capitalize on sets without Encore or Toxic, Steel- and Poison-types can wall sets that lack coverage, and Toxic completely shuts down most sets without Heal Bell or Rest. Overall, once Mega Audino has been sufficiently scouted, it becomes a lot easier to deal with if appropriate checks are preserved throughout the game.