On their way to the Battle Arena, Ash and friends arrive in a Ghost Town where they are a group of Ghost Pokémon scaring anyone who comes by. After being scared, they find a group of Psychic Pokémon, who after being abandoned, have been playing loud music all day and night. While Ash and friends try to cheer up the Psychic Pokémon, Team Rocket team-up with the Ghost Pokémon and try to stop the Psychic Pokémon for good! (thetvdb.com)