From Bulbapedia, the community-driven Pokémon encyclopedia.
Mossgreen Village (Japanese: マツモタウン Matsumo Town) is an anime-exclusive location in Kanto. It is a small town found in between the Safari Zone and Cinnabar Island. It was featured in The Problem with Paras.
Mossgreen Village is home to a medicine shop, which is owned by Cassandra and her grandmother Lacy. They make their own potions to sell to traveling Trainers, which is how they ended up meeting Ash and his friends. The shop has its very own Parasect, which helps them make the medicines and potions they need. There is also a Persian that helps guard the shop.
Pokémon seen in Mossgreen Village