Reuniclus

Reuniclus's high HP stat and amazing abilities in Magic Guard and Regenerator allow it to function as a bulky setup sweeper or a specially defensive pivot. With high Special Attack, it's no offensive slouch either, so it can use Psyshock to come out on top in Calm Mind wars against Pokemon such as Sigilyph and Rest variants of Suicune. However, without boosts, it can be easily overwhelmed by strong special attackers. It can also have trouble with Dark- and Ghost-types such as Incineroar, Guzzlord, Golurk, and Chandelure. On the other hand, an Assault Vest set can be used to answer some of the strong special attackers in the tier such as Raikou, Xurkitree, and Nidoqueen. However, this set is extremely vulnerable to Knock Off, as it will severely reduce its effectiveness in standing up to such special attackers.