Donkey

The Donkeys are a species of animal inhabiting the Real World; they have been briefly mentioned in the Marioverse.

The first chronological mention the donkey came in Super Mario World 2: Yoshi's Island, where, before battling with Yoshi, Baby Bowser mentions the green dinosaur's appearance as reminding  him of "some kind of gween [sic] donkey". The term is not mentioned again.

Two notable characters with "Donkey" in their names are Donkey Kong and Donkey Kong Jr.; however, both characters have nothing to do with the Real World donkey, being gorillas.