Magmortar

Magmortar is one of the most dangerous Pokemon in NU. Its Fire Blast is the second strongest special attack in the tier (behind only Typhlosion's fully-powered Eruption), and it can back that up with fantastic coverage moves in Thunderbolt and Focus Blast that make it extremely difficult to switch into. However, Magmortar can sometimes be tricky to fit onto teams due to two issues: its Stealth Rock weakness and its lower Speed than other Fire-types. Being weak to Stealth Rock means it requires more support than other wallbreakers like Medicham and Magneton, and, although its Speed isn't terrible, being slower than Charizard and Typhlosion makes it a less effective check to Pokemon like Jynx and Haunter. On the other hand, none of those other Pokemon bring Magmortar's combination of power and coverage to the table. So long as Magmortar's team is built to compensate for its weaknesses, it is one of the best Pokemon in the tier.