Answer
In 1994, Dan Castellaneta played the antagonist in the series Duckman. Duckman is an animated television series created by Everett Peck for the Fox Broadcasting Company. The series centers on the titular private investigator, a detective agency run by Duckman, and his assistant, Cornfed. The series premiered on October 5, 1994, and aired until August 18, 1997.