Yippee, Yappee and Yahooey are dogs who serve the King as his Royal Guards. They must always protect, serve and obey the King. At times, the three heroes find themselves fighting a fire-breathing dragon and other villains. A common mistake in nearly every short is that Yippee, Yappee and Yahooey's voices tend to get mixed up with one another. Irving Berlin wrote a stage show while in the Army during World War I entitled "Yip Yip Yaphank" at Camp Yaphank from which names were taken for this cartoon. Yahooey spoke very much like Jerry Lewis.
Yippee, Yappee and Yahooey are goofy guards that the King decides need to get into ship shape, so he assigns the Sergeant the task of running them through various drills of marching and fighting, but the poor Sarge gets the brunt of their clumsiness.
Yippee, Yappee and Yahooey gets fired by the King for overuse of his money on things like sword polish. But they get their jobs back when they unwittingly keep him away from the notorious highwayman Black Bart, who is mistaken by the King for Yahooey.