Kanto Route 4

Route 4 is a unique route located in northern Kanto. It connects Route 3 and Mt. Moon in the west and Mt. Moon to Cerulean City in the east.

The western section of Route 4 contains a Pokémon Center.

Pokémon Center
On the western portion of the route, near the entrance to Mt. Moon, there is a Pokémon Center. This is one of two Pokémon Center's that can be found on a route, the other being on Route 10.

Karate Brothers
They can be found on the eastern side of the route in the northern part standing on a mound. They give TMs for the moves the moves Mega Punch and Mega Kick to the player.