Head for the beach down south, go around to the left and challenge the youngster walking on the sand. Up north is Mr. Briney’s cottage. You don’t need to go there for now. Continue your way north and give the little boy a potion if you want.
Youngster Billy(Prize Money: P96)
Pokémon:
Up to the northern side of the path, you'll find Pecha Berries (x2) and Oran Berries(x2). Like before, you can plant them too in the soft soil. Head west to challenge the Rich Boy near the forest entrace. Enter the woods once you are done.
Rich Boy Winston(Prize Money: P960)
Pokémon: