Screenshot from the episode.
"Scary Hospitality" (Japanese: こわいイエのおもてなし!; literally: "The Scary House's Hospitality!") is an episode of the animated TV series Pokémon XY: Kalos Quest which makes suitable viewing for Halloween. It first aired on TV Tokyo in Japan on May 14, 2015 and on Cartoon Network in the United States on July 18, 2015.
Plot[]
Still continuing their journey, the heroes stopped by at an old mansion which Serena claims it the "Scary House". As they go inside, they meet a mysterious man named Lon and learn the truth and horrors about this house.
See the article on XY072: Scary Hospitality! on Fandom's Pokemon wiki.