Prism, the player character in Pokémon Prism, comes from an unidentified region west of Naljo.
Pokémon Brown[]
At the end of Pokémon Brown, the region is briefly mentioned by the Pallet Patroller.
Pokémon Prism[]
A small part of the region is seen at the beginning, before the player accidentally travels to Naljo in a mine cart, after a landslide has occurred.