Reuniclus

Reuniclus is a unique Pokemon that serves as a slow yet bulky and powerful wallbreaker with good longevity. Its ability, Magic Guard, allows it to completely ignore passive damage, such as Toxic from Chansey and Hippowdon, as well as sand damage from the latter. Magic Guard also negates Life Orb recoil, which, in tandem with its high natural Special Attack stat, makes it extremely difficult to switch into, and its coverage options in Focus Blast and Thunder are able to wipe out checks like Zarude, Hydreigon, Mandibuzz, and Celesteela. Reuniclus's bulk allows it to trade with and KO common Pokemon such as Moltres, Salamence, and Zygarde-10% with enough prior chip damage. However, Reuniclus is terribly slow and often relies on prediction. It is also prone to getting overwhelmed by offensive teams, which give it very few chances to use Recover. Psychic is also a fairly mediocre defensive typing because it doesn't resist common attacks and is weak to the omnipresent Knock Off and U-turn, which means Reuniclus is often forced into using Recover more than it would like to, further limiting its offensive presence. Furthermore, Focus Blast and Thunder's poor accuracies make using an attack that isn't Psychic a gamble. Reuniclus also faces heavy competition from Pokemon like Galarian Slowbro and Azelf; the former has more expansive coverage and a better defensive typing, while the latter is faster, generating momentum with U-turn and progress with Knock Off. Reuniclus is stronger than both, however, and can ignore passive damage like sand and entry hazards, making it harder to overwhelm.