Fungus

Jeff Fungus is a character in Disney/Pixar's 2001 film Monsters, Inc.

Design
He is a small red monster with three eyes and two legs similar to those of a chicken. He wears three-lensed glasses.

Monsters, Inc.
In the film, Fungus is Randall's scare assistant. He is rather wimpy, due to the wrathful temper of Randall, and helps him with his plot to revolutionize the scaring industry, although he regrets it.

He helps Randall (out of fear) to create the Scream Extractor. Fungus is initially a kind person and means well, even apologizing to Mike about his capture. Due to Sulley's timely intervention, Fungus falls victim to the machine himself, which blanches him white, implying that it would cause great physical harm if used on a child.

Fungus is later seen operating machine's controls once again, this time testing it on Boo as Randall and Waternoose watch on in anticipation. He also assists Randall as they pursue Mike and Sulley (who had rescued the girl from the device) but falls behind due a crowd of monsters congratulating Randall for supposedly breaking Sulley's Scare record, courtesy of Cecelia at the PA system's controls. After Randall is banished to the human world, Fungus is a lot happier and takes on the job of making children laugh. He is also grateful to his new boss, James Sullivan, both for forgiving him for conspiring with Randall earlier and assigning him a job on the newly commissioned "laugh floor". It is unknown if he also became a scarer, as it was revealed in Monsters, Inc. Scream Team Training that the monsters still use screams.

Monsters University
Contrary to popular belief, Fungus does not appear in Monsters University, which means that he probably met and became Randall's scaring assistant by the time both of them had been fully employed by Monsters Inc. He was going to appear but this was dropped at the last minute.