High Quality Content by WIKIPEDIA articles! Dimension X is a fictional alternate dimension in the Teenage Mutant Ninja Turtles (TMNT) 1987 cartoon series and the TMNT Adventures comics. Dimension X is the home of several characters on the show, most notably one of the main antagonists Krang. Characters usually use the dimensional portal located inside the Technodrome for transportation between Dimension X and Earth, though other portals and other means of travel are occasionally seen.