Teenage Mutant Ninja Turtles, sometimes abbreviated to TMNT, is an American media franchise created by the comic book artists Kevin Eastman and Peter Laird. It follows Leonardo, Michelangelo, Donatello and Raphael, four anthropomorphic turtle brothers trained in ninjutsu who fight evil in New York City. Supporting characters include the turtles' rat sensei Splinter, their human friends April O'Neil and Casey Jones, and enemies such as Baxter Stockman, Krang, and their archenemy, the Shredder.