Ash and friends meet a girl named Bianca. Professor Juniper has asked Bianca to meet up with them in order to deliver a badge case to Ash. As Bianca gets the case out it is all dusty from sitting at the bottom of her bag. Suddenly, a Minccino comes by and snatches the case and runs off with it. With Ash's badge now in the case, he is determined to get it back. Everyone chases after Minccino but catching the Pokémon proves more difficult then anyone thought.