Louie was supposed to star in that episode, but issues with the widow of Louis Prima (Louie's original voice actor) prompted the creation of Larry.
Role in the episode
King Larry makes a guest appearance in House of Mouse, where he, Mickey and the Bandar-log perform a song featuring Larry singing about how he wants to be like Mickey after chasing out the vulture band who was to perform earlier on, causing a mess in the House of Mouse and finally learning how to behave like a gentleman.
Trivia
King Larry's name is a possible name switch of the American television and radio host, Larry King.