Dodrio

With strong STAB moves in Brave Bird and Return, Dodrio is able to threaten a large portion of the BW PU metagame, including the Grass- and Fighting-type threats of the tier like Torterra and Monferno, while its high base 100 Speed allows it to outrun threats such as Golduck and Leafeon. Choice Scarf Dodrio functions as a great late-game cleaner, while Choice Band sets can greatly threaten slower teams and are able to threaten Pokemon like Scraggy even after a few boosts. Unfortunately, Dodrio is incredibly linear, as aside from its STAB attacks, it only sports Pursuit as viable coverage; this means that defensive Pokemon that switch into its attacks such as Klang, Bronzor, and Stunfisk will completely wall Dodrio, while other Pokemon with good defensive stats such as physically defensive Articuno don't mind switching in in a pinch as well. Secondly, Dodrio's main STAB move in Brave Bird causes recoil, which further lessens its already meager longevity when coupled with its weakness to Stealth Rock. Dodrio's dependence on Choice items also makes it extremely prediction reliant, and clicking the wrong move on the wrong turn can turn it into easy setup for the opponent. Finally, while Dodrio's Speed is very good for the tier, it is still slower than Pokemon like Zebstrika and Sneasel, so sets without a Choice Scarf can struggle against these faster foes.