Oldale is a small town with not much to it, though you will encounter your first Pokémon Center and Poké Mart here. Once in Oldale Town, you can learn about Poké Marts from the man in an apron walking outside. After telling you about them, he gives you a Potion as a "promotional item". Heal at the Pokémon Center, and get ready to go on to Route 102...wait, there's this man studying foorprints over there, and he's blocking the way! In that case, go on to Route 103!