Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Krang is a supervillain who appears in the Teenage Mutant Ninja Turtles universe, most frequently in the 1987 TMNT cartoon and its associated media, such as the Teenage Mutant Ninja Turtles Adventures comic book and most of the classic TMNT video games. In the TV series, Krang was voiced by Pat Fraley.