Route 12 (Rustling Grass) The Bug-type Caterpie evolution line is a long-time fan-favorite in large part because Caterpie was the first Pokémon Ash Ketchem caught in the Pokémon anime.

The leaves are actually a similar kind of thing to the rustling grass of the normal Pokemon games. It suggests that there may be a Pokemon nearby, though you’ll have to make sure to follow it if ...