Petalburg Woods

Petalburg Woods is a forest in western Hoenn that lies between Petalburg City and Rustboro City, in the middle of Route 104.

Due to the presence of a Moss Rock, Eevee can evolve into Leafeon here.

Geography
Starting at what is later revealed to be the westernmost of two southern entrances, the player is led on a winding path through many patches of grass. The tall trees cast an eternal shadow over the ground, but it is still possible to see. It is dark enough, however, that other travelers have had the misfortune to drop and lose their items on the ground. It is possible to find these without technological assistance, but the Itemfinder makes searching a great deal easier.

The Petalburg Woods are abundant with wild Pokémon. Many low-leveled Bug-type Pokémon make it their home and can commonly be encountered in tall grass, but there are rarer Pokémon here as well. Slakoth and Shroomish can only be found within the confines of the forest. These rare Pokémon are often sought by collectors in nearby Rustboro City.

Near the northern exit to Route 104, a pair of saplings block a forked path to the east. When HM01 (Cut) has been obtained, and the Rustboro Gym Leader Roxanne has been defeated in battle, the bushes may be temporarily cleared. This allows access to the easternmost half of the forest.

The first time the player traverses the woods they travel north. On this trip, they encounter a Devon Corporation employee being attacked by a Grunt of Team Aqua, who requests assistance. Once the Grunt is defeated, the man will reward the player with a Great Ball, before making his way back to his company headquarters.