Chip and Dale are a pair of anthropomorphic chipmunks who made their debut in 1943's Private Pluto. The brothers are known for their high-pitched speech, gluttonous appetites, and penchant for mischief—typically at the expense of others. Chip can be identified by his black "chocolate chip" nose and his joined front teeth, whereas Dale has a larger red nose, two adjacent front teeth, and a tuft of hair on his head. Chip is the more logical and cunning of the two, with Dale being more dim-witted and carefree. Though the duo got their start as adversaries to Mickey Mouse's pet dog, Pluto, they would become even more infamous as arch-rivals of Donald Duck, beginning with the 1947 theatrical short, Chip an' Dale. In the years that followed, Chip and Dale became some of Disney's most beloved characters. They were popular enough to receive their own—albeit, short-lived—series of shorts, and received greater exposure in the 1990s with the premiere of Chip 'n Dale Rescue Rangers, which saw the chipmunks as a comedic pair of crime-solvers.