Ninja Turtles Characters design. Teenage Mutant Ninja Turtles Rocksteady and Bebop is 100% authentic, officially licensed Teenage Mutant Ninja Turtles merchandise! (NICK479) Teenage Mutant Ninja Turtles is an entertainment franchise created by American comic book authors Peter Laird and Kevin Eastman. It follows Turtle Brothers Leonardo, Raphael, Donatello and Michelangelo, as they Battle Evil in New York City. Lightweight, Classic fit, Double-needle sleeve and bottom hem