Pokémon Brown is a rom hack of Pokémon Red that takes place in a region called Rijon.
It is part of a trilogy of games by Koolboyman including Pokémon Rijon Adventures and Pokémon Prism.
Pokémon
Pokémon Brown consists of Pokémon from Gens 1-4 and Sylveon from Gen 6. This game also includes 5 new types: the Wood type, Gas type, Abnormal type, Wind type, and Sound type.