Route 25 is the northernmost route of Kanto. This route contains a mini-maze, made out of trees in which trainers will battle you as part of a challenge. It has a small patch of grass up on a ledge which is only accessible through this maze. At the end of the route is Bill's Sea Cottage, has a cape at the end where characters come to view the sea.
Secret Techniques used in Route 25: Chop Down Sea Skim