Houndoom

At first glance, Houndoom seems unsuited to the ADV metagame, being entirely walled by the sponges Blissey and Curselax, stopped by bulky Water-types such as Milotic and Suicune, and trapped by the ubiquitous Dugtrio. However, Houndoom is capable of filling an often pivotal role: Pursuit-trapping the spinblocker Gengar while also providing a consistent switch-in to Celebi and Superachi with its immunity to Psychic, resistance to Grass, and powerful Fire Blast. Its ability to remove Gengar is especially significant, as it allows for the likes of Forretress and Cloyster to successfully Rapid Spin with greater ease. Pursuit also helps open up a sweep from the likes of Earthquake Curselax and allows Explosion to be used with less fear.