|First appearance||"Zapp Dingbat" (7ACV05)|
- Not to be confused with Yivo.
Mouth Mutant is a mutant whose head is entirely covered with mouths and whose hands are also mouths. In 3012, Morris wanted to punch him in his big mouth and all his other mouths when he believed him to be the one Munda was having an affair with. [7ACV05]
In May 2012, Countdown to Futurama introduced Mouth Mutant through a character design (released on 28 May)  and revealed some information about him - such as the fact that he had a fun line or two - through the fourth Futurama podcast (released on 29 May). 
- ^ a b Matt Tobey (28 May 2012). Countdown to Futurama: Carmen Miranda Bender and Mouth Monster. (Comedy Centrl [sic].) Retrieved on 28 May 2012.
- ^ Comedy Central (29 May 2012). iTunes - Podcasts - Futurama: Countdown to Futurama by Comedy Central. (iTunes Store.) Retrieved on 30 May 2012.