Typhlosion

Choice Specs Typhlosion is an insanely powerful special attacker in a tier without much in the way of sturdy Fire-resistant Pokemon. Much of its power comes from its move Eruption, which has unparalleled strength with Typhlosion at full health and can OHKO most neutral targets such as Mesprit and Passimian. With Typhlosion's Speed tier, it outspeeds much of the unboosted metagame, meaning that it can frequently come in and pick up KOs. However, Choice Specs Typhlosion struggles against faster Pokemon such as Hisuian Sneasel and Choice Scarf users like Passimian that can damage it before it moves and limit its power; it's also checked by the few Pokemon that can take on its Eruption reliably such as Snorlax and Poliwrath, necessitating a team to have good answers to them such as Regirock and Dipplin, respectively. On the other hand, the Choice Scarf set misses out on some OHKOs against targets like Mesprit, but it outspeeds common Choice Scarf users like Rotom and Passimian and fast attackers like Sneasel and Jolteon. Typhlosion's Eruption is limited by Stealth Rock as well as other damaging entry hazards, meaning it requires hazard removal support from the likes of Sandslash.