The Turtle Mech was first seen at the end of Plan 10, when Donnie designed a quick draft of it on paper. At first, Donnie didn't have an adequately power source for such a construction, which was remedied near the end of Into Dimension X when Michelangelo obtained one for him just before the Turtles left Dimension X. The turtles recovered the Turtle Mech off-screen and in "Attack of the Mega Shredder!", it was fully repaired and used to defeat the Mega Shredder.