Mutank is the main antagonist in the video game Tiny Tank: Up Your Arsenal. He is a giant heartless robot that controls a robot army and plans to destroy the human. He first started of as the top robot to win the war using robots, but when he shot Tiny Tank (the main character) part of his brain scattered through each robot giving them the power to live without orders. Most of his brain impacted on Mutank making him the leader of the robot army. In the game you will hear him talking in a radio show with other robots where he talks about human extinction and how he should destroy Tiny Tank.
(link to Tiny Tank Wiki below)