Muttley is a Hanna-Barbera cartoon dog who debuted in Wacky Races in 1968 alongside Dick Dastardly. Voiced by Don Messick, he became known for expressive grumbling as well as his distinctive wheezing laugh. The character returned in Dastardly and Muttley in Their Flying Machines, which premiered in 1969. Short clips of his vocal reactions remain useful in online edits because the emotion is understandable even without dialogue: the rough muttering quickly communicates irritation, skepticism, or reluctant obedience while preserving the playful tone of classic television animation.