Krang
Krang (also spelled Kraang) is a fictional supervillain appearing in Teenage Mutant Ninja Turtles-related media, most frequently in the 1987 animated series and its associated merchandise, such as the Teenage Mutant Ninja Turtles Adventures comic book and most of the classic TMNT video games.
Krang's first comics appearance was in Teenage Mutant Ninja Turtles Adventures vol. 1, #1, published by Archie Comics in August 1988. In the 1987 TV series, Krang was voiced by Pat Fraley. He is still one of the primary antagonists to the Ninja Turtles, appearing as General Krang in the 2012 IDW comic publication. Krang is one of the main antagonists of the franchise after Shredder. The character made his first live action appearance in the 2016 sequel, Teenage Mutant Ninja Turtles: Out of the Shadows, with his voice provided by Brad Garrett.
Krang was created by David Wise, with inspirations for the Utrom, to supply Shredder with extraterrestrial technology.