D'Hoonnib is a rocky planet located in the Sidayom System, on the other side of the known galaxy. By late-season 1, the Ninja Turtles are teleported from Earth ending up on D'Hoonnib.[1] It is regarded as a kind of provincial nest, which serves as a playground for all sorts of shady figures. The only known settlement on the planet is the city of Peblak; otherwise, the surface is largely covered by forests. The planet also serves as a military garrison of the Federation, which is led by General Blanque, and also the old home and laboratory of Professor Honeycutt is located on it.
Historically the planet gained temporary residents when the Turtles by an accident with an Utrom Transmat are accidentally teleporterd from Earth to D'Hoonib and in direct connection the Federation and the Triceraton Republic who where on the hunt for Professor Honeycutt had a fierce military clash on this planet, which ended in a firefight and the retreat of the Triceratons with Honeycutt to D'Hoonnib.