Gallaxhar is the main antagonist of Monsters vs Aliens. He is an alien overlord who had destroyed his home planet and intended to conquer Earth and replace its population with clones of himself. He was voiced by Rainn Wilson.
History[]
Prior to the events of the film, Gallaxhar had destroyed his homeworld. He apparently did this for extremely petty reasons, namely to put a stop to his wife nagging him about wanting children and because he hated his parents.
During the film, Gallaxhar is first seen waking up from cryogenic sleep after his computer alerts him that it has found Quantonium on a planet called Earth. Hearing this, he sends one of his robotic probes to collect it. However, the monsters destroy the probe and the information transmitted back to him reveals that Ginormica is too strong.
When Gallaxhar arrives at Earth, he abducts Ginormica and almost kills Insectosaurus. Soon after, when she is on board the mothership, she gets taunted by him after he causes a global panic. Later he extracts the Quontonium out of her body, which he uses to create an army of clones of himself in order to wipe out humanity and repopulate Earth.
Death[]
After battling the clones and rescuing Ginormica, the monsters plan on escaping after Dr. Cockroach triggers the mothership's self-destruct via dancing. While the monsters escape due to Insectosaurus having healed and turned into a butterfly, Gallaxhar isn't as fortunate and is killed in the explosion of his mothership.