Pokémon - Season 15 Episode 21 Climbing the Tower of Success! Gotta catch 'em all!
Overview: After winning his sixth badge, Ash and friends bump into Stephan. He is in town to compete in the Bell of Wishes Festival that is being held that day. Ash, Iris, and Cilan, after finding out that the winner gets to ring the bell atop Mistralton Tower and get a wish granted, decide to compete in the festival.