Flopsie

Flopsie is King Bumi's pet gorilla goat. It has a gorilla's face and body, rabbit ears and speed, a goat's hind legs, tail, and horns. Flopsie is extremely large, has green eyes, and loves to have his belly scratched.

History
In "The King of Omashu", one of the tasks that Bumi set for Aang was to bring him his pet Flopsie. Initially, Aang assumed that Flopsie was a small rabbit that Bumi had pointed out. By realizing his mistake, and calling the large gorilla goat Flopsie, Aang passed the test.

Aang encountered Flopsie again in "Return to Omashu", freeing the large creature from being used as forced labor by the Fire Nation soldiers.