The Crobat pattern looks like it could have been a graphic made for one of the 90s' Batman films.
The gear based idea for Hoothoot is pretty great. I don't think I ever realized that Hoothoot's "glasses" could be gears? I did notice that its "horns" were clock hands, though.
Its G-Max Drum Solo, "Rillaboom strikes up a beat with the sticks on its hands and elegantly controls tree roots with its spectacular drumming skill." Then the tree roots erupt from beneath the opponent.
I'm a sucker for simple neon designs so I love the Flaaffy pattern. Also a fan of the Drizzle Politoed pattern, and I'm legally obligated to shout out my boy Quilava.