Heatran

Heatran is one of the best Pokemon in the metagame thanks to a variety of different traits. Its typing and really well-rounded stats make it a good check to top threats within the metagame like Magearna, Mega Mawile, Tornadus-T, and Ferrothorn. Additionally, because of Z-Moves, it's hard to consistently keep Heatran in check defensively. For example, it can easily overwhelm checks like Garchomp and Mega Alakazam with Steelium Z as well as Tapu Fini and Rotom-W with Grassium Z. It's an exceptionally useful Stealth Rock setter because it can easily pressure common Defoggers like Tornadus-T and Rotom-W. It can also function as a stallbreaker with the combination of Magma Storm, Toxic, and Taunt, only adding to its overall versatility. However, Heatran's popularity is not entirely positive. Because of how popular it is, Pokemon like Magearna, Tornadus-T, Volcarona, and Tapu Lele—Pokemon that Heatran is supposed to check—often elect to use super effective coverage moves to handle it. In addition to this, Heatran has no reliable recovery, which makes it pretty easy to wear down with entry hazards and even resisted moves like Hurricane over time. Heatran's middling Speed tier also leaves it susceptible to offensive Pokemon like Landorus-T, Ash-Greninja, and Mega Medicham.