Question: Squealer is a fictional character, a pig, in which author's book, "Animal Farm", in the book, he is described as merely a fat pig, but in the 1954 film, he is a pink pig, whereas in the 1999 film, Animal Farm, he is a Tamworth pig who wears a monocle? 
Sentence (from "Squealer (Animal Farm)"): He plays the secondary antagonist to Napoleon, the pigs' leader.
Relevant evidence: No