Speedy in the Samurai Pizza Cats episode "A Little Bit O' Luck". When he got rich, he ditched his job at the Pizza Parlour, harshly insulted Polly and Guido and generally acted like a jerk. At the end of the episode, Speedy reconciled with his friends who stuck him with some pretty mean chores to make it up to them.
Abyo from Pucca is always a bit arrogant and self-absorbed, but in the episode "Fab Abyo", it's cranked to 11 when he's selected as the Chosen One for the House of Sha-Lo and essentially turned into a Korean pop star.
Shinji very briefly gets this in Neon Genesis Evangelion, only to be sucked inside a giant shadow monster and helplessly navel-gaze for the next eight hours.
Fifty years later, this seems to be the case with the young "hero" Alpha, gaining super powers by accident, instantly becoming a media darling... then cheating behind his girlfriend's back, emancipating himself from his parents and forcing Spidey (who's fault it was that he HAD powers in the first place) to declare it's going to end.
In the movie The Princess Diaries the main character gets a makeover and instantly heads straight for the local Jerk Jock, ignoring the nice guy entirely until the inevitable fallout.
Mercifully averted by Charlie Bartlett in that he's never mean to anyone even after he's a celebrity of the entire school and sticks with the same girl he met in the very beginning. Are we sure this is a proper high school comedy?
This is the mercilessly executed final point of My Own Private Idaho. Keanu Reeves' character spends the entire movie as a penniless prostitute, waiting for his father's inheritance to clear. The moment it does, he turns his back on his entire former life. He refuses to even acknowledge the men he previously regarded as his best friends and rejects his "real" father-figure. The father-figure dies immediately after this rejection, presumably of heartbreak. And after spending the entire movie deriding his biological father's phony politician friends, Reeves' character has no qualms about joining their ranks.
The Mighty Ducks 2 - When the Ducks become famous as in an international tournament as "Team USA," Coach Bombay abandons his coaching responsibilities in favour of milking his newfound wealth and fame for all it is worth.
Spider-Man 3 - Peter Parker lets Spidey's popularity go to his head, which drives a wedge between him and Mary Jane.
Used in the movie Little Big League, where the kid manager starts ignoring his friends to have lunch with hall of fame baseball players. His way of making it up? Autographed baseballs.
In the movie 21 the main hero is a poor MIT student, that becomes associated with a bunch of card players, trying to rip off Vegas casinos. The shining Vegas life goes to his head, and he neglects his old faithful friends. In the end, of course, he comes around, and admits being a 'jerk'.
The description of this trope might as well be the description of the classic 80s movie Can't Buy Me Love: the main character likes the most popular girl in school. She screws up her mom's expensive dress, so he gives her the money he has been saving for a telescope in exchange for her hanging out with him for some time. He becomes popular and friends with the "jocks" that used to punch him and his former friends, and in the process, he becomes a jerk. I won't spoil it further for you, but the movie itself might as well be the trope codifier of the "popular vs not popular" wars.
In Cloudy with a Chance of Meatballs, Flint is convinced by the mayor to keep the FLDSMDFR going, even when the food starts getting dangerously large, in order to continue getting the praise and attention of the world. While he doesn't become a huge jerk, he does put Sam down when she tries to warn him about the coming food storm.
He was still upset that his dad, who noticed his steak was too big, still isn't proud of him.
In My Super Ex-Girlfriend, Jenny acquires this along with her superpowers and becomes G-Girl, leaving poor Barry alone and embittered to become Prof. Bedlam.
Somewhat averted in Heathers, where Veronica has, pre-movie, ditched her old friend Betty Finn to get in with the Heathers and participates in their mean girl hijinks, but a) is extremely self-aware and self-loathing about it all and b) still speaks to Betty in the caf and once invites her over for a game of croquet—the film deals with the social aftermath of such a shift rather than making the moralization of it the Aesoppy point.
Somewhat averted in Sky High. Once Will realizes he's hurt his friend Layla's feelings by allowing his time to be manipulated by Gwen, he immediately rushes after her, instead of shrugging it off like most characters do. And he never really acts smug or superior when his powers get him attention.
Subverted in the Harry Potter series. Various characters, in particular The Daily Prophet accuse Harry of exhibiting this though in actuality he doesn't at all, and he just wants to be normal. Ron actually thinks Harry's developing this in Goblet of Fire though he ultimately relents.
Gilderoy Lockhart seems to have it.
Voldemort on the other hand seems to have been a narcissist ever since he was a kid.
Happens to Ron briefly when it said he survived an attack from Sirius, who got in the dormitory to attack Scabbers (Wormtail). And again when he and Hermione were held hostage by the mermaids. Ron spent his entire childhood feeling like an afterthought compared to his brothers, and his adolescence being an afterthought to Harry. Any time he actually becomes interesting, he jumps on it and milks it for all it's worth.
Temporarily happens to Big Erik in Epic. He gets past it on the loss of his player character, though.
Named word for word in Artemis Fowl by Holly Short in The Time Paradox for Leon Abbott. This iteration uses the clinical definition rather than OUR definition.
"She was a trained negotiator, and suspected from her own observations and what No.l had told her, that Abbot had Acquired Situational Narcissism. He was completely in love with himself and his own importance in the community. Narcissists would often chose to die rather than accept what they saw as demotion. To Abbot, Holly would represent someone who was trying to remove him as pride leader, and therefore someone to be dealt with immediately. Great, thought Holly. No matter what dimension you're in, there's a big-headed male trying to take over the world."
In one of the Starfleet Corps of Engineers stories, Mor glasch Tev serves as "captain" on a holographic training voyage for a group of cadets. The power certainly goes to his head a bit. Its actually Serial Escalation seeing how puffed-up and full of himself Tev is in the first place. To the horror of Fabian Stevens, he ends up even worse after getting a short taste of command.
Live Action TV
Happy Endings: Taken Up to Eleven when Max thinks he's won the lottery. It takes him less than twenty seconds to go from "yay" to "you're all dead to me!"
In "Richie's Flip Side", Richie falls into a job as a DJ and his ego grows with every scene. He contemplates quitting school and grows a ducktail. His friends hate him so much that Fonzie orchestrates a total snub by everyone at Arnold's during a live remote. Richie's crushed, learns his lesson, and quits his job. The moral of the story? No matter what you do, you will never be as cool as the Fonz.
In "A Shot In The Dark" Richie made a last-second lucky shot winning a basketball game. He was hailed as a hero and it went to his head. Later, in the championship game he by misses a free throw and comes back down to earth. *
His father gives him some Life Savers to make him feel better, referring to an over-shown Life Savers commercial which was running at that time.
There's a slew of episodes of this kind where some of the characters (usually Sally, rarely Dick) will end up in a genre-shifted B story. In one of the tamer incidents of these stories (also an A story featuring Dick), Dick and Sally get into a magic act. The both do pretty well at a local place, but start getting inflated heads when the manager strokes their egos. Of course, Dick having an inflated ego is neither acquired or situational. He's always that way. Likely side effect of being the son of THE Big Giant Head, Ruler of the Universe.
In one episode of WKRP in Cincinnati, Johnny gets a second job hosting a TV show, and creates an utterly obnoxious alter-ego which rapidly takes over his entire life.
Arguably this has become the defining character trait of Ryan the Temp after his promotion in The Office. Only for him to be torn down when his plan to modernize Dunder-Mifflin proves less than successful, prompting him to engage in fraud to hide his failure, leading to his indictment and termination.
When the promos for the upcoming documentary about the office come out and Andy gets a few positive comments on his banjo playing, he takes that as a sign to follow his passion and become a full-time performer, despite everyone saying he's in over his head. They turn out to be right.
When Larry Sanders' sidekick, Hank Kingsley, is allowed to guest host The Larry Sanders Show, his ever-large ego takes over.
Happened in The Big Bang Theory, when Raj was listed in the 'People' Magazine's list of 30 People Under 30 to Watch. He becomes smug and obnoxious towards his friends and they stop speaking to him until the end of the episode.
In the Wolfblood episode Maddy Cool, Maddy performs a dance in front of the school that gets the guys thinking she's cool. Because one of the guys is now interested in her, the three Ks invite Maddy to a birthday party and start hanging around with her. Maddy starts snubbing Shannon and Tom, as well as fighting with Rhydian, to spend time with her new "friends". Naturally, the episode ends with her making up with Shannon, Tom and Rhydian.
The Power Rangers Lightspeed Rescue episode "In the Limelight" had Dana Mitchell taking up an offer from fashion guru Koko Kashmere to become the Glitz Girl in order to pay her way into medical school, thus making her neglect both her Power Ranger duties and her friends, especially Kelsey Winslow. Eventually, while getting ready to attend a fashion show, Dana was easily snapped out of her fame-induced Jerk Ass-ness when Koko sarcastically asked if she would really throw away a good fashion career just to be a Ranger.
Subverted in Angel. Off-screen, Lorne goes to Vegas and makes it big as a singer. For a few episodes, no one can get in contact with him, and when they finally do talk on the phone, he's distant, doesn't seem to care about his friends, and hangs up abruptly. They pay him a visit in Vegas and he snubs them directly, brushing them off as clingy fans to his bodyguards. Everyone assumes this trope has happened to him, until they manage to find out he's being blackmailed and imprisoned by the Casino to use his psychic powers for evil. If he resists or anyone tries to help him, they wind up getting their brains blown out. He was trying to protect his friends lives (and Angel's destiny) by snubbing them.
In Victorious, Robbie, after influenced by his puppet Rex creates a new video series on The Slap called Robarazzi, and develops this when he embarrasses his friends to gain popularity. After his friends get revenge, they help him find a new success in a cooking blog.
A very dark and not remotely funny version happens in the Doctor Who story "The Waters of Mars". The Doctor, having been too long without his Morality Chain companions and having gotten fed up of losing people he likes and respects alters a "fixed point" in time. While his original reason was to save innocent people from a horrible death, his dialogue makes it clear that his own pride played a big role, and once he succeeds, it completely goes to his head. Predictably, the results of a normally Awesome Ego getting pushed even higher are seriously worrying, and it takes the Heroic Sacrifice suicide of one of the people he just saved to bring him back to reality.
The plot of "Deception" by Blackalicious. A guy from the streets becomes a rich and famous rap star and ditches his former crew, then gets replaced by the next big popular star that comes along and plummets back down into poverty, while all the people he abandoned during his rise to stardom point and laugh at him as he falls. The Aesop is delivered during the chorus: "Don't let money change ya."
The song "Life's Been Good" by Joe Walsh is probably the epitome of this trope. A brutally satirical song, it talks about the jaded life of a rock star, the wreckage and damage he's left across his life while remaining oblivious to it all. In the end, the rock star sadly rues, "everybody's so different; I haven't changed."
Parodied in a LoadingReadyRun sketch where Grahams internet fame transform him overnight into a massive tool. A swift kick in the groin is all that's needed to fix him.
This happens surprisingly often in pro wrestling, where it very painfully sticks out because of wrestling's traditional Black and White Morality.
Shawn Michaels was the most frequent victim of this trope, as he seemed to schizophrenically switch back and forth between his heroic Everyman and arrogant "Sexy Boy" personas. A pretty blatant example was in the run-up to his match with Hulk Hogan at SummerSlam in 2005, which was booked as the main event because neither Michaels nor Hogan had ever been defeated at SummerSlam in singles action. Michaels "superkicked" Hogan in the face to prove that he could defeat the older wrestler, and relentlessly mocked the Hulkster as the date of their showdown drew nearer. At SummerSlam, Hogan defeated Michaels with his famous Atomic Leg Drop, prompting Shawn to immediately repent of his Jerkass behavior, shake Hogan's hand, and tell him: "I needed to know, and I found out."
Michaels did it again in January 2010, when he and Triple H were in the D-Generation X faction for the final time in their careers. DX were in the ring, boasting about how they were going to be the last two men left in the upcoming Royal Rumble Match - and Michaels swore that he would win the match and go on to defeat The Undertaker at WrestleMania XXVI for the World Heavyweight Championship. Rey Mysterio came down to the ring to rebut this, pointing out that he was challenging 'Taker for the title at the Royal Rumble and acting insulted that Michaels assumed that 'Taker would still be champion afterward. Michaels responded by telling Mysterio that he had no business being in the ring because Hornswoggle wasn't there! This insult was not only cruel but very stupid, since the one time Rey Mysterio and Shawn Michaels had wrestled one-on-one (at a tribute show for Eddie Guerrero), Mysterio had won!
A really gratuitous female example just before WrestleMania XX. SmackDown! Divas Rena Mero (better known as "Sable") and Torrie Wilson were appearing as cover girls for Playboy for the second time in each of their careers; Raw Divas Stacy Keibler and Miss Jackie became jealous of the attention that Sable and Torrie were getting, and claimed that they were the sexier Divas. (It was all very strange because not only was this out-of-character behavior for Stacy and Jackie, but in Stacy's case it was downright hypocritical because Playboy had asked her to pose for them several times and she'd repeatedly turned them down!) The matter was finally settled with a Playboy Evening Gown Match at WrestleMania - in which, instead of trying to strip each others' gowns off, the girls voluntarily stripped off their gowns before the match and wrestled under regular rules in their underwear. Jackie showed the most apparent heelish tendencies and arrogantly tried to leave the ring with her gown still on, so Sable and Torrie grabbed her and stripped her themselves, forcing her to join the match after all. Stacy and Jackie ended up losing the match when Torrie pinned Jackie in a humiliating fashion, giving her panties a wedgie for good measure. The next night on Monday Night Raw, Jackie appeared to turn heel when she attacked Stacy before their match for the evening - but the match was interrupted and then cancelled by Vince McMahon, who came down to the ring to make an announcement about the upcoming WWE Draft. Stacy and Jackie's storyline was never brought up again, and both girls remained faces for the remainder of their WWE careers.
This was the gimmick of Cody Rhodes after he was voted most attractive superstar by the WWE Divas. It only ended once Mysterio broke his nose and (at least in Cody's mind) robbed him of his perfect looks.
In Monday Night Combat, one of Mickey Cantor's post-game adverts for "Meet the Meatsacks" ends on the note of "Acquired Situational Narcissism Ensues".
Recess: Gus temporarily becomes king of the playground in one episode, and goes from quiet kid to Asshole Supreme. His ego is crushed when his status is revoked.
Subverted in Foster's Home for Imaginary Friends, episode "Sweet Stench of Success", since Mac and the others only think that Bloo was a case of this. Unusual, because Bloo is exactly the kind of person most people would expect to fall for this trope. Played straight, however, in "Bye Bye Nerdy", when Mac makes friends with the coolest kid on his school for a few hours.
One is bound to find this typical plot in just about any show on Nickelodeon, which prides itself on This Loser Is You protagonists.
Kim Possible, "Ron Millionaire": Ron gets $99 million for a snack food he invented while working in fast food in the third episode. He updates his wardrobe with excessive bling, attracts a posse of sycophants and gold diggers (including Bonnie), and in general acts like a jerk to those around him. In fact, temporary popularity going to Ron's head is a recurring plot (as was lampshaded in the aforementioned episode), as are his attempts to get said popularity.
Used in the South Park episode "The List", where Clyde becomes a tool when he thinks the girls in school think he's the hottest looking boy.
There are many episodes where Cartman thought he was living this trope, except what he thought made him "better" than the other kids was completely incorrect.
Butters, who is usually the Nice Guy in the show, has this happen in one episode where he gets his first kiss and becomes a pimp. Stan and Kyle, who stuck up for him at the beginning of the episode, become concerned with his new attitude, but Butters brushes Kyle off.
Kyle: Butters, can't you see this is wrong? You've got little boys all over school spending all their lunch money on kisses. Boys shouldn't be paying for kisses. It's wrong.
Butters: Kyle, every boy pays for kisses. Do you know what I am saying? If you've got a girl, and she kisses you, sooner or later you're paying for it. You've gotta take her out to lunch, take her to a movie, and then spend time listenin' to all her stupid problems. Look, look at Stan right there. Why he's gotta sit there and listen to her stupid motherf**kin' problems 'cause she kisses him. If you ask me, that's a lot more than the five dollars my company charges.
"Monster Gumbo": Blanche's gumbo recipe becomes popular enough for her classmates to sell it and raise money, which, of course, inflates her ego and makes her bossy towards her friends.
"Night Of The Living Dad": Embarrassed by the idea of having his dad attend the school talent show, Frankentyke makes a fake father, and uses a brain in a jar labeled "Agent" (talent agent, not secret agent). The fake dad makes changes to Vinnie's band, which Frankentyke was a part of, and makes the little guy the face of the band, which makes Frankentyke narcissistic in the process.
Also happened to Aang in Avatar The Last Airbender in the episode "Warriors of Kyoshi," though he originally started showing off to get Katara's attention.
On Family Guy Joe got leg transplants and becomes un-crippled. He becomes more exercise-obsessed than ever, leading him to abandon his slothful friends for more active (and more annoying) ones, and finally separate from Bonnie. This ends when he and his friends got into a massive brawl and Bonnie tries to shoot him in the spine until he takes the gun and does it himself, causing him to once again be crippled (and humble).
Peter becomes increasingly narcissistic after getting extensive plastic surgery to make himself fit and beautiful. It ends when he gets in an accident and goes back to normal.
This actually happens a lot in Family Guy, Meg getting a makeover, Peter becoming a producer (and later stealing Lois' directing duties) for a theatre production, Brian writing a successful novel. That said it's not as if most of the cast aren't self important Jerkasses beforehand.
Connie D'Amico turning Chris into one of the popular kids.
One Episode of Sheep in the Big City has Sheep become a presenter, abandoning his friends. His friends then comes in his big public performance, holding signs say that they will love him even if he doesn't love them back.
Milo from The Oblongs, after Pickles invented hambuckets.
Bob goes through this in "My Name is Robbie" when he gets a robotic suit after he breaks his jaw in an accident at the amusement park, making him unable to cap bottles at his job. The robotic suit makes his confidence go through the roof to the point he quits his job and gets a new one as a lifeguard, which has him Took a Level in Jerkass by gleefully destroying Milo and Beth's sandcastle despite apologizing that it's what he has to do as a lifeguard, and forgetting Beth's birthday in favor of a competition against Australians.
In The Simpsons episode "Eight Misbehavin'", the family describe what happened to them during a nine-month mid-episode time-skip. Lisa reveals that she became the most popular girl in school, "but then blew it by being conceited."
Carl in one episode get promoted and ends up treating homer like his 24 hour personal secretary.
Happened in the Jimmy Two-Shoes episode "The Masked Jackhammer", when Jimmy becomes the tag team partner to the titular wrestler and believes himself to be responsible for their victories, when they're really Jackhammer's.
According to one episode, Roger has suffered a case of this trope for over fifty years (and arguably hasn't fully gotten over it), after being convinced by his species he was sent to Earth as a decider of its fate, when in reality he was duped into working as a space aircraft's crash test dummy. After learning the truth however he sinks into a spiral of depression, leading Stan to give him duty over another important entity out of sympathy (an antidote to his deadly seafood allergy) only for Roger to once again abuse it.
The episode "White Rice" has Francine, of all people, doing this. Because Stan takes her to the hypnotist to suppress 20 years of mistakes, eventually, the hypnotist gets fed up with this and has Francine remember what she suppressed. One of these things is to be a comedian, which leads to the eponymous sitcom note she had adoptive parents who were Chinese, and the fame goes to her head, having her leave Stan. But of course, she and Stan get back together.
Baloo fell victim to this a good few times in Tale Spin, making even the more consistent Small Name, Big Ego Rebecca look rather humble in comparison. Notable examples include when he gets an award for "Best Pilot In The World" as well as gaining a life debt from Shere Khan for saving his life.
My Little Pony: Friendship Is Magic, "Sonic Rainboom": Rarity gains butterfly-like wings from a spell cast by Twilight Sparkle, and spends much of the episode showing them off and basking in the attention she gets. It ends badly (and comes close to ending in disaster) when she enters the Best Young Flier Competition as a last-minute contestant and pulls an Icarus by flying too close to the sun, causing her fragile wings to burn up and crumble.
Rarity is particularly susceptible to this; it happens again in second season "Sweet and Elite" when Rarity goes to Canterlot and soon finds herself campaigning for prestige and attention among the snobby upper crust of Equestria, denying all association with her rural background and her friends. Things come to a head when Rarity backs out of attending Twilight's birthday party in order to attend a fancy ball instead, and lies to her friends about why.To be fair to Rarity, she suffers a lot of guilt over the course of the episode, and networking among the upper class is arguably very important to her career as a fashion designer.
Nor is Rarity the only one. In "The Mysterious Mare do Well", Rainbow Dash lets fame get to her head after she saves several ponies from disaster. Her annoyed friends decide to personally construct a Break the Haughty scenario for her.
Parodied in an episode of Sponge Bob Square Pants where Spongebob acts like this after barely appearing in a commercial, oblivious to the fact that he isn't famous.
In Teenage Mutant Ninja Turtles 2003, Michelangelo wins the prestigious title of Battle Nexus Champion, and lords it over his brothers (especially Raphael, whom he defeated in the process). But he won one match by forfeit, and the final by pure luck. That doesn't stop him from bringing it up constantly for the entire next season. Of course, he gets his comeuppance when his final opponent challenges him to a rematch — and breaks the safety spell on the ring. Mikey finally has to admit he wasn't quite as confident as he pretended, and begs them for help training. Of course, then Michelangelo wins fairly — and lords it over everyone for the rest of the series.
Consistently happens to Beetlejuice on his cartoon show. Most notably in the episode "It's The Pits," where his head literally inflates from his massive ego as his armpit music becomes the hit of the Neitherworld. He floats off and is unable to land until somebody else creates a musical sound even more popular.
Many examples from The Railway Series such as Thomas' egotism after getting his branch line are mirrored in Thomas the Tank Engine. He also gains a bout of this in "The Great Discovery" when put in charge of restoring an old town. He develops a case of Green-Eyed Monster when a new engine takes his place, though is ashamed and snaps back when his ego escalates to the point of playing a humiliating trick on his new rival.
A major source of mockery throughout Clone High's run, generally happening to Abe once an episode whenever he thought he had a chance with Cleo.
In the Goof Troop episode "Talent to the Max," this is invoked by an evil magic hat. Max, who is very bad at magic tricks, puts on the hat and suddenly becomes amazing at them. The magic hat uses Malicious Slander against PJ so that Max doesn't listen to his warnings that the hat is evil, and then Max chooses the hat over him. It turns out that the magic hat was deliberately making Max as narcissistic as possible so that it would be impossible for him to remove it from his head. And a person's head is all the hat needs to cause all sorts of mayhem. The only way for Max to remove the hat is to confess to being the world's worst magician.