Buzzwole

Buzzwole is a physical wall that compresses checking many incredibly dangerous Pokemon such as Groudon, Zygarde, Necrozma-DM, Yveltal, Weavile, Marshadow, and even Zekrom more loosely. Its massive HP and Defense stats take even boosted attacks well, giving it the incredible and rare ability to survive any hit Marshadow throws out, and its Fighting typing lets it absorb Knock Off so its teammates' items can stay intact. Buzzwole pairs nicely with a lot of common defensive Pokemon that are weak to these setup sweepers, such as the omnipresent Yveltal + Necrozma-DM + Eternatus core, giving it great team value. However, its incredibly low Special Defense and susceptibility to status make it a prime target of options its targets can run specifically to beat it, limiting its consistency in certain matchups. Draco Meteor Zekrom, Groudon with Fire-type coverage, and Toxic Zygarde, for example, can all capitalize on these weaknesses extremely well.