The Gooster is a creature created by Inglip's scientists. Upon creation of a new genetic facility, the first monster Inglip spoke of was the Gooster. Assuming it was just a gigantic goose monster, Inglip then added that it must contain feline charateristics. The creature has yet to be used for service of any kind. Other beasts created along with the Gooster is the Skyant and the Yi-Tea Pokemon.
The Gooster is an enormous brown goose with a head of a cat sticking out of its breast. Strangely enough, the creature has no visible legs, suggesting that flight is its only means of locomotion.