Teppelin (テッペリン Tepperin?) is the beastmen headquarters and the residence of Lordgenome. It is a large drill-shaped fortress that breaks the cloud barrier. Contained within it is the Space Gunmen, Dekabutsu.
Little is known about the city itself. Only that after the end of the First Anti-Spiral War, and following the beginning of Humanity living underground, Lordgenome began creating the Beastmen to serve him in keeping Humanity from exceeding a population of 1,000,000 and setting off the Human Extermination System set up by the Anti-Spirals. For the following 1,000 years, the Spiral King began to take in women from a certain village in order to produce children to raise and later abandon/discard from Teppelin (the last of these children was a daughter named Nia), it was around this time that a small band of Humans managed to find a means to fight back against the Beastmen by stealing Gunmen and stormed against Teppelin itself after defeating each of the Four Generals along the way there. It was during the 7th day of the Battle of Teppelin that the Spiral King was killed by the leader of Team Dai-Gurren when Teppelin fell. Over the next seven years , a new capitol city was built on the ruins of Teppelin.