Colonel Dijon is the main antagonist of the All Dogs Go to Heaven episode "Free Nelly". He is a circus ringmaster with a clown and a muscular ballerina (named Norm and Bambella, respectively) as henchmen who abuses his circus animals, particularly the titular elephant Nelly.
When Nelly is freed by Charlie and Itchy, Colonel Dijon (with his henchmen) goes after animal control, telling the animal control officer Eugene Switzer that Nelly is crazy. Eventually, when, in a department store, Charlie and Itchy expose the video to the officer, he arrests the circus workers for animal abuse.
Dijon was voiced by Tom Kenny.