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Performer: Frank Oz
Appeared in: Monsters, Inc.
Jeff Fungus is the secondary antagonist and Randall's assistant at Monsters, Inc. He is a small, red monster with three eyes and two legs similar to those of a chicken. He wears three-lensed glasses.

Fungus is rather wimpish, due to the wrathful temper of Randall, and helps him with his plot to revolutionize the scaring industry, although he regrets it.

Fungus is initially a kind person and means well, even apologizing to Mike about his capture. He eventually falls victim to the machine himself. After Randall is banished to the human world, Fungus is a lot happier and takes on the job of making children laugh. He is voiced by the famous "Muppeteer" veteran, Frank Oz.

Fungus does not appear in Monsters University, which means that he probably met Randall after they started working at Monsters, Inc. Though, one of the ads in the credits was labeled "Fungus's Friends."


Fungus is shown to be very clumsy and cowardly, the latter proven when Randall threatens him to put him through the shredder if he doesn't bring another door to the station.


  • Fungus is not really evil, as he only serves Randall because he fears him.


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