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.
Courage the Cowardly Dog (1999)
1 trivia entry for season 4
Starring: Lionel G. Wilson, Marty Grabstein, Peter Fernandez, Simon Prebble, Thea White
Continuity mistake: When Courage gives the chicken his suitcase, it at first says "Mars" on it, but then it changes to "Albany".
Freaky Fred: Goodbye, dear aunt, I'll miss your farm. And Eustace's eboliant charm. And farewell, Courage, what's the harm? If I was slightly... naughty. With love, Fred.
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.