They are antagonists that live high in the sky on Airiel Island. Their origin story is unknown, but unlike the fairy tale story where they have wings, they were rude, cunning and prideful. Their ancestors tried to conquer and enslave the Gummi Bears to make the Gummiberry Juice for their flying machines in order to conquer the skies. But after they were defeated, the Ancient Gummis banished and marooned them on their floating island for 500 years with not a single drop of Gummiberry Juice. The relationship between them and the Ancient Gummis is still left in mystery.
In their debut episode Top Gum, they stole the Gummis, so to get the recipe, only for the Gummis to escape, leaving them high and dry for another 500 years.