Diancie

Diancie is an interesting defensive Pokemon in the tier that compresses Stealth Rock with the ability to check Noivern, Arcanine, Goodra, Mega Ampharos, Swellow, and Houndoom thanks to its typing and mixed bulk. Diancie also has an easy time setting up entry hazards against a handful of the tier's removers such as Mandibuzz, Mega Blastoise, and Sigilyph. However, Diancie is completely hopeless against Steel-types like Metagross, Registeel, and Bronzong due to their resistance to its primary attacks alongside their immunity to Toxic, although Earth Power somewhat mitigates this flaw. Diancie also invites some of the most dangerous offensive Pokemon in the metagame like Zygarde-10%, Shaymin, Roserade, and Virizion in due to its typing. Diancie's lack of reliable recovery can also leave it worn down quickly throughout the match, and it can be chipped down by Stealth Rock and Spikes and crippled by poison and burns. Diancie faces competition from other defensive Rock-types like Rhyperior and Gigalith, which both have essential tools to pressure out Steel-types and can also check Salazzle as opposed to Diancie, but Diancie's higher Special Defense and part-Fairy-typing, which allow it to be a more reliable answer to Houndoom and other special attackers, can set it apart.