Dimension X was home of several characters who often create difficulties for the Turtles on Earth, most notably one of the main antagonists the evil alien warlord Krang in the Archie Comics. Characters usually use the Trans-Dimensional Portal l located inside the Technodrome for transportation between Dimension X and the Earth, though other portals and other means of travel are occasionally seen.
Dimension X is a spiral galaxy in which numerous inhabited (or habitable) worlds are located. In contrast to earthly space, space in Dimension X is colored reddish orange and able to guarantee the survival of various forms of life without any protection - or breathing equipment.
- Rock Soldiers
- General Traag
Locations in Dimension X
The following locations are seen in Dimension X:
The Eden Worlds are the collective name for a series of planets with a primeval nature, which were never bothered by civilized beings, that were reminiscent of the wilderness of East Africa, . It is said that the most "intelligent" species were forbidden to live on those planets.
There Cherubae banished Bebop and Rocksteady to an Eden World, so that they could never do more "bad things" again, and in this place they very quickly became accustomed to living with the local fauna. Rocksteady and Bebop hitched a ride with Krang and Bellybomb where they briefly returned to Earth in order to emigrate the local zoo animals to their Eden World. Once that was successful, Bebop and Rocksteady took Krang and Bellybomb back to Morbus before returning to their Eden World with the zoo animals. (Teenage Mutant Ninja Turtles Adventures)
The name "Eden Worlds" refers to the Bible stories in the Old Testament about the Garden of Eden.
A planet that is either the home or a colony of Malignoids is. Here is the final battle between the Turtles and finds Krang to the Turnstone instead. 
A planet which is either home to or a colony of the Malignoids. The decisive battle between the turtles and Krang to the turn tone takes place here.
Hirobyl is a planet orbiting an aging and dying giant star which is either home to or a colony of the Malignoids. Krang is said to have destroyed all life on the planet. The decisive battle between the Turtles and Krang for the Turnstone takes place here. The name of the planet is possibly a reference to the atomic bombing of Hiroshima in 1945 and the 1986 Chernobyl disaster, since the planet is dying and the TMNT refer that a giant structure reminds much of the workers statues who can be seen in the former Soviet Union back in those days.
Huanu was a planet in the system that orbited a red star sun. It was the homeworld of Wingnut and Screwloose and their respective races, until Krang assaulted the world, completely destroying it and all its inhabitants in search of the Turnstone, save for the pair who escaped and swore revenge on the warlord.
Morbus is a world that is used by the inhabitants of Dimension X as a toxic and nuclear waste dump and prison planet. It is on Morbus that Krang encounters Slash and Bellybomb. On this inhospitable planet, Krang was exiled after his final conflict with the Turtles.
Palmadise was a planet once covered in palm trees and the homeworld of Slash. The planet was deforested by the order of the Galactic President, who demanded all the palm trees to use as wood for his fireplace. Its current state is unknown.
The Stump Asteroid is the home of Stump and Sling. From this asteroid, they host the Stump & Sling Intergalactic Wrestling, in the Stump Arena. Another resident, Cudley the Cowlick, was in charge of the "recruitment" of new fighters, transporting the wrestlers to and from Stump Asteroid. In addition to the Turtles, (who wrestled at Stump Asteroid twice), famous wrestlers include Ace Duck, Bloodbath, Cryin' Houn (who later changed his name to El Mysterio), and Leatherhead. (Teenage Mutant Ninja Turtles Adventures)