Gerald is an alien that was found by Prof. Eggtop and his twin brother many years ago! A meteorite landed on Earth and the two scientist brothers went to investigate. What they found was an alien, guinea pig looking, cute furball! Prof. Eggtop wanted to keep Gerald safe and return him to his home planet of Mars. His brother wanted to do experiments on him, so they split and Gerald became Prof. Eggtop's pet! And Prof. Eggtop's brother became the evil Dr. Poacher!! Gerald really likes to eat popcorn! But when he does he gets really big, so Prof. Eggtop tries to keep it away from him. Otherwise, Gerald will wreak havoc on the city of Brisbane!