Crobat

Crobat has a small niche in DOU as a Tailwind setter for fast offensive teams. Crobat's base 130 Speed and ability Inner Focus allow it to reliably set Tailwind in most matchups, as it boasts the fastest non-Prankster Tailwind in the format and cannot be contested by Fake Out from the likes of Incineroar and Rillaboom. While it does compete in this niche with Ribombee, Crobat's access to Taunt comes in handy for maintaining its team's Speed advantage, preventing opposing Tailwind and Trick Room setters such as Naganadel and Diancie from being problematic. Strong teammates such as Urshifu-R, Landorus, and Heatran are preferred to capitalize on Crobat's Tailwind, with these three in particular being notable for decimating Diancie. One must be wary of opposing Zeraora, however, which completely counters Crobat because it is faster, can prevent Tailwind with Taunt, and hits Crobat super effectively with Plasma Fists. Partners such as Zygarde, Rillaboom, and Kyurem-B are preferred to deal with Zeraora, and these Pokemon are competitive beneficiaries of Tailwind as well. Crobat's biggest weakness, though, is how little offensive presence it has after setting Tailwind; its lacking offensive stats often leaving it exploitable against offensive teams, though Super Fang does mitigate this somewhat.