The Teleporter is an object that appears in Paper Mario: The Thousand-Year Door.
The Teleporter can be found in a room in the X-Naut Fortress. It leads to a secret room in Rogueport Sewers. The Secret Society of X-Nauts use this Teleporter to get to and from Rogueport during their search for the Crystal Stars.TEC attempted to let Princess Peach flee to Rogueport using the Teleporter to save her from being used as an offering to the 1,000 year-old demon. Unfortunately, Sir Grodus caught onto them and shut down TEC.
After Mario and company defeated Lord Crump in his Magnus von Grapple 2.0 at the end of Chapter 6, they head into TEC's room who awakens barely with any strength left. However, he was able to tell Mario that Princess Peach has already been taken away and directs him to the teleporter. Once Mario leaves via Teleporter, TEC appears to have exploded with the base. However, after the Shadow Queen has been defeated, Mario can use the Teleporter to go back to the X-Naut Fortress to not only find the base still in tact, but TEC still alive as well.