Question: Princess Eilonwy, is a fictional character in Lloyd Alexander's "The Chronicles of Prydain", she also appears  in four of the five novels in the series, as well as Disney's 1985 animated film adaptation of which 1985 American animated dark fantasy adventure film?
Sentence (from "The Black Cauldron (film)"): The 25th Disney animated feature film, it is loosely based on the first two books in "The Chronicles of Prydain" by Lloyd Alexander, a series of five novels that are, in turn, based on Welsh mythology.
Relevant evidence: No