Ninja Turtles design. Teenage Mutant Ninja Turtles: Mutant Mayhem Group is 100% authentic, officially licensed Teenage Mutant Ninja Turtles merchandise! (NICK10310) 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. Two-part protective case made from a premium scratch-resistant polycarbonate shell and shock absorbent TPU liner protects against drops Printed in the USA Easy installation