Randall Boggs

Randall 'Randy' Boggs is the main antagonist in Disney/Pixar's 2001 film Monsters, Inc and the deuteragonist-turned-secondary-antagonist in its 2013 prequel Monsters University. He is voiced by Steve Buscemi.

Personality
Randall is Sulley and Mike's direct rival and nemesis. Randall's scare assistant is Fungus, who usually annoys him. He usually gets into small disagreements with Mr. Waternoose. Randall resembles a lizard, with the ability to change his color from purple and blue to blend into his surroundings at will, much like a chameleon, making him invisible. He also is implied to be treacherous, as he responds to Waternoose's statements about not leaving behind any witnesses to their actions ("There won't be" with a glare) that he intended to backstab Waternoose later on.

Monsters University
In the prequel, Randall (nicknamed "Randy") is first seen when Mike arrives to his new room. The two greet each other, but Randy, unable to control his invisibility power, randomly disappears. Mike suggests that he should use that power more often, to Randy's shock. He soon follows Mike's advice of getting rid of his glasses because they don't disappear whenever he turns invisible. Randy is worried about school and wonders if he'll manage to impress the cool kids, but Mike reassures him. He follows Mike and sits next to him on their first day of class.

Later, while Mike is studying scaring, Randy decided to bake cupcakes for a party organised by the cool kids. At the party, Randy tries to offer cupcakes to some girls, but Mike runs into him while riding Archie the Scare Pig, splattering all the cupcakes on Randy, much to his dismay.

He is later seen helping Mike study by asking him questions on phobias (such as arachnophobia, fear of spiders).

However, Randy ends up abandoning Mike since he became a member of Roar Omega Roar and refused to help Mike and join Oozma Kappa since he's finally with the "cool kids".

After this, he is frequently seen in group shots of the Roar Omega Roar until near the end in which he is the one to compete against Sulley in the last of the Scare Games. After Sulley beats him in the final competition, he looks over bitterly at Sulley and bitterly mumbles his last line in the film, "That's the last time I lose to you, Sullivan". Because of this, Randall assumedly begins his gradual descent into villainy as his jealousy for Sulley grows. Because of his hatred for Sulley, he also comes to no longer accept Mike as well but not for the same reason. Randall seems to hate Mike by the time Monsters Inc. happens, not because of anything that he personally did to him, like Sulley, but simply because of Mike's close association with him.

Monsters, Inc.
Randall works as a Scarer for Monsters, Inc. by entering children's rooms through a system of closet doors and scaring them to extract their scream energy. He is in competition with Sulley and Mike for the glorious post of Top Scarer. However, Randall has also constructed a "Scream Extractor," and attempts to kidnap a human child in cooperation with the company's leader, Henry J. Waternoose, with the hope of eventually rising to the leadership of the company.

However, this plot failed when Sulley was sent by Mike after closing hours to recover paperwork (which Mike forgot to turn in) and stumbled upon the kid, whom Sulley nicknamed Boo. After Mike and Sulley are exiled, Randall and Waternoose go through with testing the scream extractor on Boo (although Waternoose expresses distaste for having to exile Sulley and Mike due to Randall's negligence, as well as pointing out that Sulley was "twice the scarer Randall could ever be"). After Sulley manages to escape and wreck the Scream Extractor, Randall then attacks Sulley and tries to strangle him. He proves to be quite an adversary, due to his chameleon-like abilities. However, when Mike gets annoyed with the fact that Sulley is not listening to his apology, he throws a snowball at him, hitting Randall instead: allowing Mike to realize that Randall has been attacking Sulley. He goes after the trio in a chase through the factory until he manages to grab Boo and escape into an activated door. When Sulley comes to rescue her, Randall surprises him and attempts to send him falling from the door, lamenting of how Sulley was always the best Scarer and with him gone, Randall will finally come on top. Suddenly, Boo begins to pull on his frond and hits him with a baseball bat, making him turn different colors, then Sulley restrains him with a chokehold, followed by a snake wrestling maneuver. Afterwards, he gets thrown through an active door that banishes him to a trailer home in the middle of a swamp in the south, where a cajun family beats Randall senseless with a shovel, thinking that he is a gator. The door is then tipped over the railing it was leaning against and shatters on the floor far below, thus trapping Randall.

Monsters, Inc. Laugh Factory
Randall eventually found his way back to Monstropolis using the door system and survived his encounter with the hillbillys. As part of his revenge against Mike and Sulley, he tried to frame Mike for stealing other monster's comedy props. After Mike has been sent to prison, Randall strikes again trying to frame Sulley for assault on Waxford when he visits him in the security camera room to look at the tapes of the locker room. The fight makes it's way to the Laugh Floor where after being unable to hit Randall, Sulley succeeds in exposing him by pulling the fire alarm. Randall is sent to monster prison afterwards and Mike's name is cleared.

Later, Randall would be freed by Sid Phillips (who had visited the Monster World earlier) alongside Mr. Waternoose and the three would together work on another revenge plot. They cut off the door power when Mike and Sulley return from a visit to Boo's and try to figure out how to go about their revenge. Randall turns down Waternoose's idea of a frame job and Sid just wants his reward of being given the door system patents to become rich in the human world. Eventually, Celia and Boo escape when Boo activates her door and the three villains give chase while shutting Mike and Sulley out of it. Going through the neighbor's house, all three try to capture them, but Celia and Boo make it to the resident child's closet and bring the three right to a CDA task force waiting to take them into custody. It is unknown if Randall ever reformed and was released, though there is an extremely small chance.

Disney Parks
Randall appears in various attractions based on Monsters, Inc, such as Monsters, Inc. Mike & Sulley to the Rescue! at Disney California Adventure and Monsters, Inc. Ride and Go Seek at Tokyo Disneyland. In Ride & Go Seek, Randall has returned to Monstropolis and tries to capture Boo once again.

Trivia

 * Randall's original names were "Switt" and "Ned." He was named "Ned" in the early treatment, and "Switt" in the original opening.
 * Randall Boggs was the second Pixar villain to be physically fought; the first being the Prospector.
 * Randall is ranked #27 in the Top 30 Disney Villains.
 * Randall shares the same first name and many traits of Randall Weems from the Disney television series, Recess. Both characters are sneaky, mean, and have the same posture.
 * Randall for some reason is the only Scarer in the film that is referred by his first name on the Scarers' Leaderboard rather than by his last name. This could imply that "Randall" at one point was actually going to be his last name rather than his first name.
 * Randall's nephew, Rex, made an appearance in the "Monsters Inc. Storybook Collection" as one of the toddlers in the company's day care program. It is unknown whether Rex has the surname Boggs or not, but is often referred to as "Randall's nephew". Rex greatly resembles his uncle- including Randall's ability to "disappear"- but has orange scales and only one frond, as opposed to Randall's purple scales and three fronds.
 * In a computer game set after Monsters, Inc., Randall now appears to be back at work, and is no longer depicted as evil. Instead, he has apparently reformed, but is still extremely devious.
 * In the prequel, Monsters University, Randall appears to be wearing glasses, while in the original he doesn't. This is due to the fact that Randall learns that he cannot make clothing invisible,such as glasses, and discards them. This also explains why he is seen squinting in Monsters Inc., since he cannot see well without glasses.
 * One of the backgrounds Fungus used to demonstrate Randall's cloaking abilities is the cloud background that served as the wallpaper of Andy's bedroom in the first Davis residence seen in the first Toy Story film.
 * The color schemes Randall underwent after hit by Boo before Sulley grabs him and throws him into the hillbilly trailer door include pale yellow with red zigzag lines, blue with purple spots (Sulley's own color scheme), pink and yellow plaid, white with red stars, a red brick pattern, green and yellow swirls, red and black plaid, blue with white spots, purple with a brown head, purple with white stripes, a red circle pattern, and finally solid green.
 * According to the M.U. website, Randall had very little control over his camouflaging abilities as a kid. Though MU the movie does not go into detail on this fact, it can assumed that between the events of M.U. and M.I., Randall had learned to assume near perfect control over his abilities.