Principal Nigel Brown is a supporting character in The Amazing World of Gumball. He is the principal of Elmore Junior High and is madly in love with his staff member Miss Simian. As a consequence, Nigel Brown is not very responsible when it comes to running the school, and does not seem to care about the well being of his students that much.
In the early concept, Principal Brown was merely a slug with a thick coat of purple fur that seemed to lose hairs when he would be moving. Like his final concept, he wore glasses over his eyes.
In the show, Principal Brown is a slug with a thick coat of brown fur that covers his entire body, except for his eyes. He wears thick round glasses. He also has a nose that is hidden under his furry coat. In "The Fraud," Darwin finds a pair of high heels in his safe. This tells why he walks in a peculiar manner and why he makes a telltale sound when he steps. In "The Mystery," some of Principal Brown's fur was burnt off, revealing that he has tan-tinted skin. At the end of "The Mystery," he has sharp fang-like teeth, but, while in the nurse's office, he has regular teeth. Beneath his hair, his body appears to be humanoid, as seen in "The Burden," and later, "The Stars." Principal Brown speaks in a soft-spoken tone of voice, with a slight British accent. In season 2 onwards, he gets a small redesign. His glasses are more "perfectly" shaped. In "The Flakers," he is shown with puffy mauve lips beneath his fur.
Despite being the principal of Elmore Junior High, he is shown to have a massive crush on Gumball's teacher, Miss Simian, and they are constantly flirting, much to everyone else's dismay. Because he spends most of his time thinking about and trying to please her, he does not pay much attention to the students. In addition to this, Principal Brown has also been shown to get into the Wattersons' personal business, like in "The Painting." Although, in "The Genius," he did not care at all that the Wattersons would never see their son, Darwin, again. He is also very proud of his appearance, as shown in "The Meddler."
However, despite being annoyed with Gumball and Darwin, punishing them frequently for their antics, there are times where he does not cave into the whims of Miss Simian. He took their side in "The Apology," when she tried to get the boys in trouble. Principal Brown knew she was trying to frame them and insisted that she be the one to apologize.
- "The Third: He can be seen briefly in the schoolyard.
- "The Painting": He is concerned that Anais' family is dysfunctional, so, he orders them all to change.
- "The Mystery": Principal Brown is found wrapped in toilet paper, shaved, painted green, and stuffed in Gumball's locker.
- "The Party": He and Miss Simian ambush Rachel's party.
- "The Sock": He gets caught up in Gumball and Darwin's honesty shenanigans.
- "The Genius": He breaks the news to the Wattersons that Darwin is being sent away.
- "The Curse": He forces Gumball to wear an outfit more suitable to the school's dress code, after his regular clothes get torn into shreds. He then gives Gumball seven hours' detention for hurting his feelings.
- "The Meddler": He gives Gumball detention for eight hours, at Nicole's behest, and later judges the cheerleader tryouts with Mr. Small.
- "The Remote": He appears in the parking garage of the Elmore Mall.
- "The Fridge": He appears in the school gym in Gumball's flashback.
- "The Flower": Gumball tries to get him to bust Leslie.
- "The Job": He is briefly seen in his car.
- "The Apology": His first major role. Gumball and Darwin have to help him keep his relationship with Miss Simian.
- "The Words": He sends Darwin to Mr. Small's office for reckless behavior.
- "The Skull": Gumball, Darwin, and Clayton are sent to his office for causing damage to school property.
- "The Bet": He punishes Gumball, Darwin and Bobert for messing with the defibrillator, and making fun of Ms. Markham's mother.
- "Christmas": He is seen driving his car, carrying a Christmas tree on top of it.
- "The Flakers": Richard dashes by, causing Miss Simian to accidentally shave off a line of his fur.
- "The Authority": In Richard's flashback, his car got rammed by Richard's car.
- "The Pony": His car almost runs over the DVD Gumball is chasing.
- "The Hero": In Gumball's flashback, Richard dances in front of him.
- "The Sidekick": His car passes by Gumball and Darwin while they are trying to move Jackie across town.
- "The Tag": His car runs over the Wattersons' trash can.
- "The Storm": He appears outside his office with Banana Joe, Carrie, Leslie, Ocho, Teri and Tobias.
- "The Lesson": He finds out that Gumball and Darwin have cheated on their math test, and sends them to detention class as punishment.
- "The Boombox": He flirts with Miss Simian.
- "The Tape": He appears in one of Gumball's videotapes.
- "The Sweaters": He asks Gumball and Darwin to introduce transfer student Sarah to Elmore Junior High, and later, he advises the boys how to win the fight with the Richwood High students.
- "The Internet": He is one of the drivers involved in a massive pile-up.
- "The World": He is walking on a sidewalk, when his eyeglasses begin singing, causing him to bump into a bus stop sign.
- "The Finale": He states that Gumball and Darwin has to restart school from Kindergarten due to their reckless behavior.
- "The Coach": He can be seen driving his car when Gumball crashes into Coach's fence.
- "The Joy": He doubts Miss Simian's claim of the Joy infection, and later becomes infected himself.
- "The Fraud": His second major role. Gumball and Darwin discover that his diploma is a fake.
- "The Void": He appears in the school yearbook.
- "The Boss": He briefly appears in a photograph when the soulless office worker talks about missing his kids.
- "The Move": He appears at the end of the episode when he sees that Gumball and Darwin were trying to frame Jamie for knocking Tobias unconscious.
- "The Law": He is seen driving his car during the Donut Cop's rampage.
- "The Allergy": He gets knocked out by Idaho.
- "The Mothers": He appears driving his car outside the mall.
- "The Shell": He appears in the theater audience.
- "The Burden": He is in his office, singing with Miss Simian.
- "The Pizza": He leads a gang against the Wattersons.
- "The Lie": He first appears inside one of Miss Simian's desk drawers.
- "The Butterfly": He is in his car waiting for Gaylord Robinson to stop holding traffic.
- "The Saint": He, along with Miss Simian and the Librarian are yelling angrily at Alan.
- "The Safety": He is part of Darwin's new police force. He is later arrested on charges of complaining about Darwin's regime.
- "The Society": He gives Gumball three months detention. He later appears as part of the secret society.
- "The Spoiler": He is at the cinema.
- "The Downer": He does not actually appear, but is mentioned by Gumball while he is at the park.
- "The Triangle": He is the conductor of the school marching band. He later accuses Gumball and bans him from the marching band after finding out that he tried to sabotage Darwin's instrument.
- "The Return": Richard calls him and says that the kids have swollen heads, a cough, their skin is falling off, and they have black lumps. This leads him to believe that they have the plague.
- "The Crew": He can be seen in a flashback, working at the car wash.
- "The Others": He appears during Clare's happy ending.
- "The Signature": He is at the town hall.
- "The Pest": He is seen in Billy's puppet show.
- "The Gift": He accidentally stabs Idaho while eating his lunch.
- "The Parking": He drives off the side of the mall parking lot.
- "The Routine": He is in his car.
- "The Upgrade": He is teaching a music class.
- "The Comic": He is in the crowd of people who sing the theme of LaserHeart.
- "The Romantic": His car is rear-ended at an intersection.
- "The Uploads": He appears on an unseen video.
- "The Wicked": His car is defaced by dirty water thanks to Margaret Robinson.
- "The Origins: Part Two": He is in his car when Darwin escapes from pest controller.
- "The Girlfriend": He is part of Jamie's apology note.
- "The Advice": He and Miss Simian march to Gumball and Darwin, but the Abraham Lincoln goat knocks him and Miss Simian down.
- "The Love": He is part of the "What is Love?" segment.
- "The Bus": His third major role. He is one of the criminals that hijack the school bus.
- "The Night": He is seen at the teachers' lounge in Teri's dream.
- "The Blame": He is present during the PTA meeting.
- "The Slap": He is teaching a music class.
- "The Compilation": He is seen with a whole group of people.
- "The Scam": His office gets haunted, and he is later seen with the crowd of Elmore citizens cheering Gumball and Darwin to hunt Gargaroth.
- "The Disaster": He is seen when Rob rewinds the show back to its intro.
- "The Rerun": He appears in one of Gumball's memories.
- "The Stories": He hides from Molly in a locker, and later participates in Gumball's plan.
- "The Boredom": He is sitting on a lawn chair.
- "The Vision": He is in Alan's manifesto.
- "The Choices": He helps topple a statue of Nicole.
- "The Loophole": He checks his balance at an ATM and follows Rocky in the store he broke into.
- "The Catfish": The back of his head is visible in a wedding photo.
- "The Cycle": He is the organizer of the prom night.
- "The Stars": He gets a haircut from Larry, and later loses his job due to a poor review.
- "The Grades": He supports sending Gumball back to Kindergarten, but later informs Miss Simian that she will be fired by the school board if he does not return to her class. He then supervises Gumball's exam.
- "The Singing": He sings "You're a Hairy Lady."
- "The Nuisance": He is in the crowd that hates the Wattersons.
- "The Line": He is in line.
- "The List": He conducts a music play.
- "The Lady": He eats a candle, then passes out and is sent to the hospital.
- "The Sucker": He puts Julius and Darwin in detention, and later appears in a flashback.
- "The One": He tells Tobias to stop yelling.
- "The Father": He is seen driving his car.
- "The Cage": He tells Gumball, Darwin, and Mr. Corneille about the prisoners, and later watches Mr. Corneille get crushed.
- "The Neighbor": He introduces Gary to the students.
- "The Anybody": Gumball runs past him whilst trying to get to class on time, and he later appears watching Stellar Odyssey at the cinema.
- "The Faith": He is stuck in traffic when the color is drained from town.
- "The Candidate": He is at the Children's Future Ball.
- "The Pact": His fourth major role. He and Gumball make a deal to each confront the other's girlfriend about one of her poorer traits.
- "The Shippening": Sarah ships him with Jackie.
- "The Brain": He is in his car with Miss Simian.
- "The Founder": He is seen in his car.
- "The Schooling": He is in the mall and listens to Gumball sing in the mall.
- "The Intelligence": He helps Gumball and Darwin to fight the senior citizens.
- "The Potion": He is in the street and Hector looks at him.
- "The Understanding": He gives the welcome to Peter by the microphone of his desk.
- "The Ghouls": He sings "All Hail All Hallow's Eve!"
- "The Stink": He teaches the students during Mr. Small's absence.
- "The Slip": He is hairless.
- "The Buddy": He punishes Anais and Jamie.
- "The Possession": He is cheering for the furniture fighting.
- "The Wish": His fifth major role. His relationship with Miss Simian is tested.
- "The Agent": He gives Gumball and Darwin a top-secret assignment to track down the culprit who stole several items from Elmore Junior High, then gives William a week of detention.
- "The Revolt": He is eaten by a toilet.
- "The Decisions": He tells Darwin that his diorama is better that Tobias'.
- "The Inquisition": He is nervous about the superintendent coming to school.
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- Lewis MacLeod (US/UK, season 1)
- Steve Furst (US/UK, season 2 onwards)
- Dário de Castro (Brazil)
- Rafael Pacheco (Latin America)
- As shown in "The Grades," he screams like a little girl.
- His name may be a reference to the Beavis and Butt-Head character of the same name.
- In some episodes, a cyan-colored character that closely resembles him can be seen in the lunchroom.
- A recurring gag in season 2 is Principal Brown having to stop his car, usually to make way for the Wattersons. This has occurred in "The Remote," "The Job," "Christmas," and "The Internet."
- He seems to be more friendly to the Wattersons in season 2.
- Despite his feelings for Miss Simian, he threatened to fire her if she kept framing Gumball and Darwin in "The Apology" and even sent her back to eighth grade at the end of "The Grades" after discovering she had cheated back then.
- He seems to be quite intelligent, as shown in "The Genius," where he is seen to possess a Brain Academy mug.
- He seems to possess the ability to move his nose in and out of his hair at will, as seen in "The Fraud."
- He is revealed to wear red high-heels in "The Fraud."
- It is revealed in "The Fraud" that he does not have a valid principal's diploma, which means he is not legally a school principal.
- According to "The Crew," he is also working at the automatic car wash as a rotary brush.
- It is shown in "The Burden" no matter how much hair he waxes, it instantly grows back.
- He apparently grows a massive amount of hair every day, as shown in "The Stars."
- Apparently even he does not know what he is, and all he has learned is that his species does not hibernate, as shown in "The Lie."