Musharna

Musharna stands out as one of the most physically bulky Pokemon in the tier, which in combination with reliable recovery in Moonlight makes it an excellent catch-all check to most physical attackers that can't hit it super effectively, such as Tauros and Archeops. While Mesprit is often a better choice for many roles due to its larger movepool and higher Speed, Musharna is usually a better choice for a bulky Calm Mind sweeper because Mesprit lacks reliable recovery. Musharna can run many different variants of its signature Calm Mind set, each of which is stopped in different ways, making it incredibly deadly if the opponent has mispredicted Musharna's set and preserved the wrong checks, and it can wipe out teams from the very start of the game if the opponent lacks appropriate countermeasures. However, its extremely low Speed ensures that Musharna quickly becomes dead weight if it's significantly weakened, meaning it must heal often to sweep or pivot consistently, and Moonlight's low PP prevents it from stalling out foes indefinitely. Furthermore, if Musharna chooses to run support moves instead of coverage, it can be quite easily walled regardless of its boosts if the opponent packs a Dark-type, and unless it runs Heal Bell, Toxic poison shuts it down completely.