Magmortar

With its tremendous Special Attack and expansive coverage, Magmortar sets itself apart as one of the most terrifying wallbreakers in NU. Excellent mixed attacking stats and diverse coverage options, such as Thunderbolt, Earthquake, and Focus Blast, allow Magmortar to hit most of the tier for at least neutral damage. Magmortar's ability, Vital Spirit, allows it to safely switch in on sleep-inducing moves such as Sleep Powder from the likes of Vileplume and Lilligant, as well as Lovely Kiss from Jynx. Respectable special bulk alongside a decent defensive typing allows Magmortar to check a number of special Ice-, Grass-, and Fire-type threats. Magmortar sports a Speed tier just fast enough to outspeed some relevant offensive Pokemon, such as Shiftry, Mesprit, and Kabutops. However, its Speed and lacking Defense typically leave it helpless against faster, physically oriented Pokemon, such as Scyther, Tauros, and Archeops. Magmortar's pure Fire typing also leaves it weak to Stealth Rock and vulnerable to Spikes with no reliable way to heal back the damage.