Whilst heading to Blackthorn City, Ash and co. spot a trainer battling with his Poliwrath. After seeing it battle, Ash wants a go, but Misty intervenes. After the battle Misty gets her Pokémon healed and Poliwhirl takes Ash's King's Rock. After the second battle the trainer introduces himself as Delaney, and a while after that he is tricked by Jessie, disguised as a fortune teller. Can Ash and co. help Delaney get his Poliwrath back, and is there more than one way to make a Poliwhirl evolve?
Like the last episode, this episode's Japanese and American air dates are 366 days apart.