Hippowdon

Hippowdon is one of the bulkiest Pokemon in the metagame. With its gargantuan HP and Defense and Ground typing, Hippowdon is one of the best defensive answers to Tyranitar, which can almost never 2HKO Hippowdon without a way to boost its damage output like Choice Band, Expert Belt, or Dragon Dance. In addition, depending on whether it's physically or specially defensive, Hippowdon can wall a large portion of the metagame. Its ability, Sand Stream, is extremely desirable, as it forces constant chip damage on almost all Pokemon that are not Rock-, Ground-, or Steel-types. Thanks to Hippowdon's access to an instant recovery move in Slack Off coupled with its bulk, its longevity is near unrivaled. With access to great utility in Stealth Rock and Roar, Hippowdon functions as a fantastic, consistent support option.

However, Hippowdon is extremely slow and can be passive even with its STAB-boosted Earthquake, so it's not difficult to offensively pressure it. Water- and Grass-types give Hippowdon an extremely hard time, especially the latter, which resist its Earthquake. Setup sweepers like Dragon Dance Gyarados and Calm Mind Suicune can put tremendous pressure on Hippowdon, as staying in to phaze them, whether by choice or by necessity, can result in sustaining a ton of damage. Skarmory can use Hippowdon to set up Spikes, which Hippowdon detests. There are very few Pokemon that despise status more than Hippowdon, as poison and burn make it significantly worse at doing its job.