An in-game screenshot of the male protagonist outside a house. Twinleaf Town(フタバタウン,Futaba Taun?, Futaba Town in the original Japanese versions) is the town in which the protagonists of Diamond and Pearl, the player and their archrival, reside and from which they begin their journey across the region of Sinnoh.
Masago Town Masago Town houses the laboratory of Professor Rowan, an accomplished professor whose expertise concerns Pokémon, and features the game's first Pokémon Center and Pokémart.
Kotobuki City Kotobuki City houses a television station, the Trainer's School, "Pokétch Company", the company which makes the Pokétch, and the Global Trade Station, which allows for trading over the Nintendo Wi-Fi Connection.
Kurogane City Kurogane City is a coal-mining city, home to the first Sinnoh region Gym Leader - Hyouta. It also houses a museum which revives the fossils of ancient Pokémon.
Hakutai City Hakutai City is home to the second Gym Leader, Natane, as well as a Bicycle Shop and a Team Galactic building.
Tobari City Tobari City is home to the third Gym Leader, Sumomo, as well as a Department Store, Game Corner, and Team Galactic's official Regional Headquarters and Warehouse.
Nomose City Nomose City is home to the fourth Gym Leader, Maxi, as well as the Safari Park.
Zui Town Zui Town is home to a Day-care Center and is nearby the Zui Ruins, which contain the Unown.
Mio City Mio City is home to the sixth Gym Leader, Tougan. Mio City also has a port in which the player can board a ship to Iron Island, an island off Sinnoh.
Nagisa City Nagisa City is home to the eighth Gym Leader, Denji, a market for buying stickers that can be placed on Poké Balls and a lighthouse that overlooks the Pokémon League. Much of the city is powered by solar cells.
Pokémon League The Pokémon League Headquarters is portrayed as a magnificent castle at the top of a large waterfall in Diamond and Pearl.
Haha, that's where I went to get what you see here, but they don't say anything about the routes just yet. I know the numbers, but I don't know where they would go in relation to the towns and cities, so until we find that out, we wait.