Trevenant

Trevenant is one of PU's most devastating wallbreakers because of its high Attack, amazing offensive typing, and powerful STAB moves in Poltergeist and Wood Hammer. Trevenant also has some useful defensive attributes that differentiate it from other offensive Ghost-types such as Gourgeist-S and Froslass. Chief among these qualities is Natural Cure, which allows it to more comfortably switch into status inducers like Quagsire and Glare Sandaconda. Furthermore, Trevenant can heal while attacking with Horn Leech, which isn't weather-dependent like Synthesis, and isn't weak to Stealth Rock like Froslass. However, Trevenant lacks the bulk and longevity necessary to make full use of these good traits. While it outspeeds most defensive Pokemon, Trevenant is still incredibly slow, which, combined with its frailty and poor defensive typing, makes it easy to pressure and limits its opportunities to safely switch in. Trevenant also faces competition as a Ghost-type wallbreaker from Gourgeist-S and Froslass, since both are faster, the former is more versatile with moves like Explosion and Flame Charge, and the latter offers vital utility in Spikes.