Early in the morning Ash saw the freakiet thing ever: A Rhydon emerging from the water. After hearing this tale Misty thinks he's making it up, until they meet a girl named Pietra who is looking for a Rhydon who knows Surf. Team Rocket thinks this is unusual and decide to get the Rhydon as a gift for the boss. Can Ash and co. help Pietra get the Rhydon before Team Rocket does?
Iron Tail, the most powerful of all Steel Type Moves back in the days of Generation II, was introduced in this episode.