Ellie the Elephant did not originate from fanon, and the information on this page may not be entirely accurate to their canon. You may read more about this subject in the context of their canon on the following wiki(s):
Donkey Kong Country 3: Dixie Kong's Double Trouble!
Ellie the Elephant is an Animal Friend that appears in the Donkey Kong series. She is a large, gray elephant and a strong ally to the Kongs.
Her only appearance is in Donkey Kong Country 3: Dixie Kong's Double Trouble!, where she can be found and ridden on by destroying her Animal Crate. Ellie has two unique abilities, both involving her trunk. She is able to suck in nearby objects such as Barrels with her trunk and hold them up, and can throw them at enemies or obstacles. She can also use her trunk to collect water from bodies of water such as a river or a waterfall, and fire it at enemies as a projectile. However, she becomes scared when mice-like creatures, such as Sneeks, appear, causing her to drop whatever she is carrying and run away, based on the popular but untrue myth that real-life elephants are negatively cautious of mice.