Rogueport Sewers is a huge chain of rooms under Rogueport that contain the Thousand-Year Door, various Warp Pipes, and the Pit of 100 Trials. There is a hidden town here with a shop that sells rare items such as Ultra Shrooms and Gold Bars. Hidden in the sewers is a Teleporter that the X-Nauts used to teleport from X-Naut HQ to Rogueport. The main way of getting into the sewers is a pipe in front of Professor Frankly's house. Another way in is West Rogueport's sewer grate. Special Blue Pipes leading to Petalburg, The Great Tree, Keelhaul Key, Poshley Heights and Fahr Outpost can be found in the sewers.
Regular portals to particular regions include a stone warp pipe to Petal Meadows, two wooden pipes: one to Boggly Woods and one to Twilight Town, although the one to Boggly Woods is monochrome like the rest of the woods and the one to Twilight Town is brown with exaggerated shadows, and a blue warp pipe is used to gain access to Fahr Outpost. The Teleporter is the fourth portal found in Rogueport Sewers and is used to reach the X-Naut Fortress and through that, the Moon after Mario is fired out of the cannon, as it is impossible to be fired again.
When Mario reaches the bottom floor of the sewers for the first time, he has to learn a new paper ability to reach the door from the first Black Chest Demon inside a Black Chest. After Mario reaches the Thousand-Year Door, he has to stand on the pedestal and hold up the map. The map shows him the location of one of the Crystal Stars. This process is repeated after every Crystal Star Mario gathers.
A Squeek can be found here, looking for her lost partner while researching the depths of Rogueport Sewers.
Aside from the items on sale at the center city on sublevel 1, the player can found the following items in this area:
Hidden ? Block
Names in other languages