The Utroms (Oot-rum) are an alien species that appear in both the original comic and the 2003 Teenage Mutant Ninja Turtles show. This is the species belonging Shredder's same version. Although in this version they hold the role of hero (finding the concept of violence almost abhorrent) it is thought that famous Krang is an Utrom too and, maybe for that reason, "utroms" in 2012 hold the role of villain with the name of the Kraang.
Role in 2003 Show
One thousand years ago, an Utrom ship was transporting the dangerous Utrom criminal Ch'rell. Unfortunately Ch'rell escaped and sabotaged the ship, causing it to crash on Earth. Landing in feudal Japan, the ship was damaged beyond repair and in the confusion Ch'rell escaped on Earth.
In the present day, the Utroms operate through T.C.R.I. (Techo Cosmic Research Institute). Though the company's official business is never revealed, unofficially it serves as a place to hide their advanced technology, such as the Transmat (a teleporter that can reach across the galaxy) and the Oracle Pod (a virtual reality chamber that replays historical records). T.C.R.I. is also responsible for the mutagen that transformed the Turtles, Splinter, and Leatherhead which was the fuel for their Transmat. Unable to repair their ship, the Utroms decided to take advantage of their long lifespans (which allowed them to live for centuries, even millennia, of human time) and hide and peacefully wait for Humanity to advance and develop the technology they needed to go back home. In order To hide among the Humans, they developed human-shaped exosuits, However, one exosuit was captured by Ch'rell. To guard against the the renegade Ch'rell, they revealed themselves to a select few trustworthy humans who they named their Guardians. Centuries later, Hamato Yoshi, Splinter’s late master, would become an Utrom guardian. Ch'rell now "The Shredder" hunted him down and killed him in an attempt to find the Utroms location.
In the 2003 series, when the Utroms were leaving Earth, one of the Utroms called another one who was whining "Krang", as a reference to the 1987 series' character.
The Utroms later return to help the Turtles in their battle against The Utrom Shredder. Thirty seconds before the The Shredder's ship blew up, they put the ship in a stasis field and used the Transmat to transport everyone out. On their homeworld, The Utrom Shredder—now identified as the Utrom Ch'rell—stood trial and was sent to exile on an icy asteroid prison, Mor Gal Tal.