The Underminer

 The Underminer is a villain that appeared at the very last minute in the Pixar movie,  The Incredibles. He's not the main villain in the movie, but he is the main villain as well as the final boss in the video game; The Incredible: Rise of The Underminer, which is somewhat like the sequel to the movie.

As the Underminer orders killer robots to rage war on Metroville, Helen, Violet, Dash and Jack-Jack fight off the surface invasion and Mr. Incredible and Frozone follow the Underminer into the depths of his underground city. The Underminer plans are revealed; to activate a machine called the Magnomizer, which would pollute the Earth above. The two super-heroes destroy the machine, and the Underminer.

Trivia
''The Underminer is based on the Fantastic 4 villain Mole Man. He lives underground, he has a serious hatred to humanity, and his nose looks like a mole's nose.''