The group meet a young boy named Tyler who is chasing after a Yanma. They learn that he is a beginning trainer, just having started his journey. He tells them that he has been running after Yanma for three days, but the Pokemon constantly escapes. Ash and his friends agree to help him make his capture. As Tyler is about to catch Yanma, however, it is caught by Team Rocket for the boss. Delibird then delivers Yanma to Giovanni and, much to Team Rocket's surprise, Yanma is returned to them. Jessie decides to be the Yanma's Trainer and, while battling Ash, Tyler and the others, it evolves into Yanmega.