The forerunner of Pluto debuted in the 1930 cartoon short “The Chain Gang” as a bloodhound on the trail of escaped prisoner Mickey Mouse. During the orange dog’s second appearance in “The Picnic,” his name was Rover. A year later he became Pluto in “The Mouse Hunt.” Since then, Mikey’s pet has evolved into one of the six leading characters of the Walt Disney Company. He is seen here in the Festival of Fantasy Parade.