Grim Adventures Of Billy And Mandy (the) Easter Egg - Johnny Bravo Reference

On the episode of Billy and Mandy where Billy turns into a werewolf, Irwin is seen walking down the street reciting a list of groceries shortly before bumping into Were-Billy. When he recites his list, he says "A quart of milk, a loaf of bread, a stick of butter."

Johnny Bravo recites this same grocery list on one of his episodes.