Pokémon S13E02 - Short and to the Punch!

While on the way to the next contest town, Gible falls in a river. Buizel saves it. This attracts the attention of a trainer, who wants to have a battle between Buizel and his Mr. Mime. Ash agrees. Mr. Mime proves to be too strong for Buizel though. Following this loss, Buizel is determined to get stronger and defeat Mr. Mime.