Ever thought it'd be cool to have your art, writing, or challenge runs featured on PokéCommunity? Click here for info - we'd love to spotlight your work!
Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
Those are maps that the developers decided not to use, but remained in the game, even if not reachable.
The fourth one was the first Lake of Rage, the last Mount Silver. I don't know about the other.
However, there should be an hex code...but I really don't know.