They collaborate with Waternoose to save the company by kidnapping human children to solve the crisis and allow Randall to rise to a higher position, but also secretly planning to betray Waternoose and take over the company. It is later discovered that Randall has an ulterior motive: he and his long-suffering assistant Jeff Fungus are building a large vacuum-like machine dubbed the Scream Extractor, which is capable of collecting the screams of human children that he plans to capture and extract their pneumothoraxes, thus asphyxiating its victims. They also compete for the All-Time Scare Record. Randall does manage to win top position for a few seconds until Sulley returns from a slumber party, thus winning it back. In Monsters, Inc., he vies for the position as the area's top scream collector, a competition set up to encourage working. He is Sulley's arch-rival and Mike's nemesis and former best friend. Manoux in Kingdom Hearts III, Piotr Michael in Disney Speedstorm) is a purple, eight-legged, salamander-headed, chameleon-like monster who can change his skin color to blend in with his surroundings. Randall Boggs (voiced by Steve Buscemi in the film series and the tie-in video games for the first film, Peter Kelamis in the Disney Infinity video game series, J.P. In Monsters at Work, he is elected Co-CEO and teaches Scary Monsters how to be funny.

He has made appearances in other Pixar movies, such as Finding Nemo (2003), Cars (film) (2006), WALL-E (2008), and Toy Story 3 (2010).

Mike Wazowski is not only known for his humor but also his intelligence. Mike Wazowski is portrayed as a comedian in Tomorrowland at the Magic Kingdom in Walt Disney World Resort attraction, Monsters, Inc. Waternoose’s involvement in the scheme to the CDA Agents. At the last second, Mike Wazowski is saved from the extractor by Sulley and after he and Sulley foil Randall Boggs's plot, they report Mr. Randall Boggs ends up kidnapping Mike Wazowski for the scream extractor. However, this makes Sulley suspicious and Mike Wazowski tries to prove him wrong. Randall Boggs finds out his involvement from the glimpse of him near Boo in a newspaper and Mike Wazowski makes a deal with him to return Boo. While Sulley bonds with Boo, Mike Wazowski desperately wants her gone. Additionally, Sulley helps Mike Wazowski in his mission to save Boo. Mike Wazowski is in a relationship with Celia Mae at this time. In Monsters, Inc., Sulley runs Mike Wazowski's station on the scare floor and they are close friends and roommates. They advance through the ranks until Sulley becomes a scarer with Mike Wazowski as his assistant. After being expelled, the two apply as workers in the Monsters, Inc. These actions result in both Sulley and Mike Wazowski being expelled from school. Mike Wazowski is devastated his team won by cheating and later breaks into the door-lab to unsuccessfully collect a child's scream before Sulley saves him.

Sulley and Mike Wazowski begin to build a friendship as they compete together. Sulley and Mike Wazowski join the Oozma Kappa fraternity to qualify for the Games. Sulley joins Mike Wazowski, despite Mike Wazowski's protests. After failing the class, Mike Wazowski works out a deal with the school's dean to re-enroll in the program on the stipulation that he wins the Scare Games. It is seen that Randall Boggs and Mike Wazowski hang out a lot, studying together and even sitting next to each other in class. He likes Randall because he's a Scaring major and his roommate at the time. Mike Wazowski initially dislikes Sulley for his arrogance and bad work ethic. He gets accepted into the Monsters University scare program years later where he meets both Sulley and Randall Boggs in a SCARE 101 class. On a class field trip to Monsters, Inc., Mike Wazowski is inspired to become a professional scarer. Mike Wazowski is depicted as a proud, confident monster, but he had a lonely childhood and he struggles to make friends. He has four fingers on each hand and three toes on each foot. Mike Wazowski (voiced by Billy Crystal in the film series, shorts, and the Disney+ series, Carlos Alazraqui in the video games, merchandise, attractions, and commercials and Noah Johnston as his younger self in (Monsters University) is a green cyclops-like monster with a round body, two small horns, and thin arms.

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