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Some TMNT stuff really isn't for little kids.
Donatello's appearance in the Archie publications were largely based on the 1987 Murakami-Wolf-Swenson incarnation, but with Mirage Studios writers on board at Teenage Mutant Ninja Turtles Adventures such as Steve Murphy and Ryan Brown, a lot of references to his Mirage counterpart were made. Donatello was showcased to be pure of heart and soul, being able to pass through the Netherworld unscathed. He was also chosen of the Turtles by a group of aliens known as the Sons of Silence to share their wisdom. He was one of the few who could telepathically communicate with them. Donatello was almost a pacifist, detesting every time he used violence.
His inventions made future Donatello a billionaire.