On their way to Celestic Town, Ash & Co. meet up with Professor Rowan and find a Pokéon Summer School. In it, you get given a Pokémon to take care of and raise in order for you to use it at the end of the month and win a championship. Ash & Co. all decide to join in. However, with these new Pokémon come new problems. Will they obey?

Continuing their Summer School adventure. Ash & Co. are sent to investigate some supernatural goings on nearby for a report at the school. Upon investigating the area, they all discover a variety of ghost Pokémon. However, as well as the Pokémon, there is another paranormal entity. Does it have sinister motives?