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What is a Fanlisting?
A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject. "Official" means it's approved and listed at TheFanlistings.org.

Nibbler was introduced as Leela's rather dumb pet with a seemingly insatiable hunger for all kinds of food and especially other living animals. His excrements consist of super dense dark matter that's used as starship fuel. But he isn't as dumb as he seems, for in truth he's a member of an ancient and powerful race called the Nibblonians. They fight the evil Brain Spawn and Fry is the only one able to help them save the world, so Nibbler was chosen to stay at his side. He was also responsible for Fry's chair falling over back in 1999 so he would still be alive in the future to fight the Brain Spawn. Within his race he's referred to as "Lord Nibbler".