From Bulbapedia, the community-driven Pokémon encyclopedia.
Shroomish Forest (Japanese: キノココの森 Kinococo Forest) is an anime-only forest in Hoenn. It is located somewhere between Littleroot Town and Fortree City. It appeared in A Shroomish Skirmish, and is home to a large number of Shroomish and Breloom. It is also where May's Torchic evolved into Combusken.