Roboto is a fully mechanical warrior and a member of the Heroic Warriors who align themselves against the evil forces of Skeletor. He is a character appearing in the Turtles of Grayskull (mini-comics) and Turtles of Grayskull (comics).
Turtles of Grayskull[]
Upon learning that something had activated the paradimensional alarm, Teela and Roboto rush to Man-At-Arms' workshop to inform him and He-Man. Roboto uses his image projector to show the disruption point, which is the Swamp of Gangoon. He-Man takes Moss Man and Ram Man with him to investigate. When the trio do not return, Roboto sets out with Teela and Man-At-Arms to learn why. The group is attacked by a horde of Mousers and Mouse-Jaw, and Roboto uses his lasers to fight them. Roboto scans Mouse-Jaw and discovers that his weak points are the same as his non-mutant form of Trap Jaw. The Ninja Turtles suddenly arrive and aid the Eternians in defeating their enemies. Roboto surmises that the Turtles came from the other side of the paradimensional tear. By The Power of PIZZA!
While Man-At-Arms tells the Turtles the story of He-Man's origins, Donatello works on Roboto to upgrade his cybernetic lifeform into another entirely new cybernetic lifeform. Beast Man shows up at Palace of Eternos and then leads Teela and three of the Turtles into an ambush at Snake Mountain. Man-At-Arms and Donatello fly over in a Talon Fighter to drop the newly minted Metal-Boto, a combination of Roboto and Metalhead, into the fight. Belly of the Beast (Man)