Pokémon Season 11 Episode 4

Ash and Dawn are doing some late night training with their new Buizel and Aipom. During the battle, Buizel accidentally destroys a nearby stone tower, and unleashes the pokémon Spiritomb. The next morning Ash and the others arrive in a nearby village that was attacked by Spiritomb. After realizing the trouble they have caused, Ash, Dawn, and Brock decide to help seal Spiritomb away.