Donatello, nicknamed "Donnie" is the brains of the Teenage Mutant Ninja Turtles. He is in charge of the design and manufacture of all the tools and weapons in their arsenal. He fights with a bō, which converts to a naginata (in which a blade pops out of one end). Donatello is voiced by Rob Paulsen, who use to be Raphael's voice actor in the 1987 animated series.