Igor was a short-lived assistant to Boris Brainyov.
He was a large Caucasian man who appeared to have a shaved head. He wore a green military uniform.
Literally too dumb to live. Ordered not to throw a bomb, he instead held it until it exploded.
Scooby Doo... Where Are You! (Charlton Comics)
He was supposed to assist Brainyov, but instead was a spectacular failure.