Primeape

If one could call RBY the Psychic generation, then it's certain that BW is the Fighting generation. While Primeape has to compete with a plethora of other Fighting-types for a team spot, it has the right tools to help it stand out. Not only is Primeape the fastest Fighting-type in RU, it also has the rare Vital Spirit ability. This allows it to switch into the Sleep Powder users that dominate RU, namely Tangrowth and Lilligant, and makes it the best switch-in to Smeargle as well. Furthermore, Primeape has a unique support move in Encore, along with an extremely powerful attack in Close Combat.

Unfortunately, there is one major weakness in our anger management case. Primeape has serious issues with Ghost-types as it lacks a reliable coverage move against them, and is terrified of being burned by Will-O-Wisp. This weakness is compounded by Primeape's hatred of any kind of status, as well as its frail defenses. Primeape users should fear not, however, as Primeape has carved itself a niche in RU as a strong and speedy scout.