Thank Goodness You're Here, Uncertain-About-His-Sexuality Man

Never has a series made me laugh that much in ages...except maybe Yu-Gi-Oh: The Abridged Series:
Pokemon: Ditto
Ability: Whose Line Is It Anyway
Whose Line Is It Anyway is an ability that allows the user to copy the ability of anyone within 5m of him/her. Oddly, it also allows the user to copy any weapons the target might have, especially if the ability copied requires it (Bee Gee). If the target uses a specific fighting style, such as karate or wrestling, Whose Line Is It Anyway will be able to copy that as well. Basically, all combat abilities and equipment of the target will be copied into the user as long as the target is within 5m of the user. Ditto uses his ability to identify any other ability users. It allows him to know beforehand what abilities his opponents have as well as the way they fight. The only drawback is that even if he knows how to use an ability, he might not be able to use at as well as the original user does because he lacks practice.