Igor is a Marvel villain and an enemy of the Fantastic Four and the Avengers.
Igor was once an ordinary baboon. He was one of three apes that was trained and taken into space by a Soviet scientist known as the Red Ghost, who was seeking to get to the moon before the Fantastic Four reached it first. After being exposed by the Cosmic Rays, Igor and the rest of the apes gained super abilities; in Igor's case, he got the power to shape-shift. Igor became a member of the Super-Apes and an enemy to the Fantastic Four.