1987 Turtles. He is the brain and 80s incarnation of Donatello. 1987 Donatello debuts in Wormquake.
Once, they were four baby red-eared slider turtles, until they got mutated by the Mutagen, which also mutated a human into a rat. The turtles mutated into the 1987 Turtles. One of the Turtles was named, Donatello.