Lopunny

Lopunny's biggest asset is her unpredictability, as she can run a large number of sets effectively. When Lopunny's revealed, you won't know whether she's a supporter, a Baton Passer, or maybe even both. Many opponents blindly switch in the Pokemon who would be least effected by Switcheroo, but this plan can go awry if she sets up Substitute or Agility. Lopunny can always manage to keep her opponents guessing.

Although unpredictable, Lopunny faces stiff competition from Alakazam and Jumpluff, who both have access to Encore as well as higher Speed. Alakazam can employ Trick as well, and Jumpluff has a crippling Sleep Powder. With Trick being so widespread, other Pokemon are chosen instead of Lopunny for this particular role. That being said, Lopunny still has one the largest support movepools of any Pokemon (including the excellent Baton Pass) and a unique ability which distinguishes her from other Trick users. Lopunny's strengths lie not in brute force, but in support and messing with the opponent's strategy. One misprediction can cost you the match, so underestimate her at your peril.