Ultron is a fictional supervillain appearing in American comic books published by Marvel Comics. He is a self-aware and highly intelligent robot created by Hank Pym who developed a grudge against Pym and the human race, and is in many ways a dark reflection of Pym. Ultron's goal to destroy humanity has brought him into conflict with the Avengers, who always managed to thwart and destroy him, but he returned to haunt them time and time again. For this reason, he is often regarded as the Avengers' archenemy.
