IMDB: The Last Unicorn – 1982
IMDB Rating: 7.5/10
Rotten Tomatoes: 63%
A unicorn discovers that she is the last of her kind, and goes on an adventure to discover as to what happened to the rest of her species. Along the way she encounters the magician Schmendrick who turns her into a human threatening her very existence but keeps her safe from the mad King Haggard for the time anyway.
The old king had the red bull (and not the sort that gives you wings either) chase and drive each of the unicorns into the water until he had them all. All bar one that is.
This is a much older animated film done in the style of The Black Cauldron and others of that age, and is a (albeit bland) good story or the typical triumph of good over evil and the like, good for kids and those who like the older animated stories.