From Bulbapedia, the community-driven Pokémon encyclopedia.
Leaf Forest (Japanese: リーフの森 Leaf Forest) is a forest featured in March of the Exeggutor Squad. It is located between the Safari Zone and Cinnabar Island. It has a large population of Exeggutor. The area functions similar to a Leaf Stone, causing some species of Grass-type Pokémon to evolve without warning.
Pokémon seen in the Leaf Forest