While on the way to the next city, Ash and friends run into Professor Juniper who is studying Chargestone Cave. While talking to Juniper it is revealed that she has a Karrablast, and after seeing Bianca has a Shelmet, Juniper and Bianca trade their pokémon in order to make them evolve. However, problems arise after the trade when Bianca can’t control her new pokémon.