Heads Of Beef / Klub Katz - S1-E11
Trivia: The pig who runs the "Burgers Really Cheap" restaurant's name is Jean Bonne, and he says it's French. "Jean Bonne" is likely a deliberate alteration of "jambon". French for "Ham."
Serpent Of The Evil River / The Transplant - S2-E9
Trivia: When the computer is telling Courage about the giant kangaroo monster, the chicken it steps on looks just like the alien chicken from the very first episode of the show. It even has red eyes.
Courageous Cure / Ball Of Revenge - S4-E11
Trivia: This is the last time we see Courage's main enemies other than Eustace. Le Quack is the only one to escape after or during the half time show.
Answer: Eustace is a rather two-dimensional antagonist character. He is just a mean-spirited man who takes out his hostilities on a vulnerable dog and resents his wife having adopted him.
raywest ★
I thought the reason had to do with the attention Courage receives from Muriel.