|First appearance||"Where the Buggalo Roam" (3ACV10)|
|Voiced by||Billy West|
- Given his cowboy hat and the Western atmosphere of "Where the Buggalo Roam", Festus' name could refer to Festus Haggen from the television series Gunsmoke.
Bender: Oh yeah. Drop another Barnyard Bomb on us, Vanilla Corn!
Mixmaster Festus: Yo, fool, it's Mixmaster Festus.