Happy Town
Happy Town is an anime-exclusive town located in Johto. It appeared in Ignorance is Blissey.
Shortly before entering Violet City, Ash and his friends needed a place to stay for the night. They decided to spend the night in Happy Town's Pokémon Center. While there, they learned that this Pokémon Center had a Blissey in charge of operations instead of the usual Chansey. As it turned out, this Blissey was an old friend of Jessie's, as the two had gone to nursing school together.