From We Got This Covered:
'Originally revered for his great scientific pursuits and accomplishments, the Lylat Galaxy’s most prolific scientist, Andross, has essentially lost his marbles. After utilizing biological weaponry to destroy his home planet of Corneria, he’s exiled to the remote planet of Venom, where the hope is that he will be unable to continue his devious pursuits. Though, we all know that didn’t end up becoming fact, or else there wouldn’t be a reason to fly through space with lasers zinging. Andross has found a way to get back to work on mean spirited plans, which means nothing but bad things for the galaxy.'