Ash prepares for his fourth Gym battle against Morty and his powerful team of Ghost-type Pokémon by listening to his Pokédex’s entry about Gengar. Unfortunately, the Pokédex states that details about Gengar are unknown. As Ash muses over battle strategies, Nurse Joy arrives with his Pokémon after healing them in the Pokémon Center. They talk about the difficulty of facing Morty’s Ghost-type Pokémon and Nurse Joy suggests that Ash should use his Noctowl as a secret weapon. Ash thinks back to yesterday’s events, where Noctowl used Foresight to reveal the Gastly in the Burned Tower. Brock agrees with Nurse Joy’s suggestion, and Ash considers the suggestion further.