Leaving Two Island by way of an uphill path in its northeast corner, Cape Brink's path quickly turns to the west, leading Trainers around a small lake. From here, it goes up the mountain's path, passing through some tall grass on the way. The only thing at the top of this semi-isolated mountain is the home of a Move Tutor who will teach a fully evolved Kanto starter Pokémon a move otherwise unavailable—either Frenzy Plant, Blast Burn, or Hydro Cannon. Each of these moves can be taught only once.
After the Trainer has finished their business on Cape Brink's northern end, they can take an express path back down the mountain using Surf to travel down a waterfall and back to the plateau just north of Two Island.
In the Pokémon Adventures manga
In the Pokémon Adventures manga, Cape Brink is the home of Ultima, an old woman who will teach one of the special moves (Frenzy Plant, Blast Burn, and Hydro Cannon) to any Trainer who proves themselves worthy. Ultima's house is preceded by a two-mile-long, three-part corridor, each part containing a trial for those who wish to learn her one of her special moves.
In the FireRed & LeafGreen arc, Ultima chose Red and Blue as candidates for learning the special moves. After passing through "The Path of Jumping", "The Path of Catching", and "The Path of Battle", both Trainers eventually tied at the first place, allowing both Red's Saur and Blue's Charizard to learn their respective special moves. Ultima also later taught Hydro Cannon to Green's Blasty, who, much to Ultima's surprise, mastered it much faster than Red and Blue had mastered their own moves.