Junior Bunny is a minor character from the Busytown Mysteries episode "The Pick and Run Mystery." While Pig Will and Pig Won't are fighting in their own trap for whoever had stolen Granny Goat's roses, Junior Bunny is heard crying. When Sally asks about it, Junior says that his red ball was taken.
Spoiler[]
It turns out it was from Mr. Fixit's apple-picking machine, was designed to pick any red apple it sees; however, it mistook Granny Goat's roses, Mr. Frumble's tomatoes, and Junior's ball for red apples and took them away.