Krumm swallows a helium tank in 'Krumm Rises To The Top' causing his stomach to expand and his voice to get comically higher in pitch as he floats around. He also develops a bad attitude and alienates his friends, but they come back for him and Ickis purposefully eats a helium tank himself so they can catch up to Krumm before he floats away. The helium wears off naturally after a week, and the characters return to normal.
Ickis' special scaring ability (referred to as looming) has him inflate his body and grow gigantic, but he can't hold the form for very long. In 'Ickis vs The Red Zimbo' he abandons looming in favor of an easier tactic, and the Gromble scolds him for becoming fat and lazy. However, Ickis slims down after he looms again and realizes that was how he was meant to scare all along.
In the Action League Now episode, "Fatter", a Gypsy puts a curse on The Chief that causes him to have a huge appetite and eat rapidly, to the point where he ends up looking like a bowling ball with a head and limbs. Keep in mind that he's a plastic toy when this happens.
Adventures of Sonic the Hedgehog: In the episode, "Boogey-Mania", Tails is forced to eat a lot of junk food (although he's clearly happy to do so) in order to create a dream creature to combat Robotnik's nightmare monster. He ends up massively bloated and promptly triggers the Growling Gut to happen to him.
In Business Time, Finn and Jake get these as a result of giving all their work to the business men and becoming fat and lazy, pictured above. Jake later uses his expanding belly to defeat the businessman's machine. At the end of the episode, Jake magically gets rid of the gut; unfortunately, Finn can't do the same.
The Chamber of Frozen Blades has a sick Gunther's belly swell to titanic proportions and then... he/she lays an egg?
In Ghost Princess, after the titular character's death, Clarence drinks a lot of Softy Cheese from a fountain dispenser, causing his stomach to expand until it explodes.
The Ice King gets quite plump in Play Date after he stuffs himself with the food in Finn and Jake's kitchen over the course of hours.
Food Chain has Finn and Jake (as birds) getting absolutely massive bellies after completely gorging themselves on caterpillars.
In Joshua and Margaret Investigations, on Jake's birthday he stuffs his tummy with birthday cake, making him look like his mother Margaret during, of course, her pregnancy, as shown in the flashback.
Gumball gets a HUGE one after drinking the contents of a sink in the The Amazing World of Gumball episode "The Wand", He spits it all out after being poked by Darwin.
Hayley fattens herself up over an entire summer in the American Dad! episode "Camp Refoogee".
Hayley: Thank God we're going home. (she then pats her stomach) I think I gained the African 20. Seriously, I threw away more food than I ate.
Wakko gets a balloon belly from a meatball-eating contest in "Meatball or Consequences" (though it went away once the plot got started).
This happens to all three Warners in "Be Careful What You Eat" after gorging themselves on candy and ice cream.
Happens to Arthur in the episode "Just Desserts" after eating a bunch of candy, followed by a big meal, followed by two slices of wedding cake. Later, in a dream sequence, it happens again in a much more exaggerated fashion.
In one episode of Atomic Puppet, AP does this to Joey by using him as a human water tank in order to wash the gunge of a slime-spewing monster covering up the city.
Avatar: The Last Airbender: Momo gets one of these in "The King of Omashu" after eating a ton of cherries. As a result, he's too fat to climb through a vent to get help for the imprisoned group.
Snap has gotten one in four episodes of ChalkZone- "Chip Of Fools" after eating too many cookies (it was all a dream), "If You Can't Beat 'Em, Eat 'Em" after eating a hamburger, "Gift of Good Intentions" (along with various other characters in ChalkZone) as a result of eating an everlasting sugarloaf, and "Calling Dr. Memory" where he eats a giant meatball Skrawl was launching at him and Rudy.
In the Chip 'n Dale Rescue Rangers episode "Out To Launch", the Rangers eat so much aboard the spacecraft that they all show much rounder shapes while relaxing and digesting. This does not exclude Gadget, she looks like she's pregnant.
This must have to do with the artificial space food. Monty can eat incredible amounts of cheese without bulging. And Bink from "Adventures in Squirrelsitting" can suck out an entire apple that's twice her size, not change her shape, and still be hungry.
Chuck Jones' Chow Hound leads up to this condition with a big dog who constantly bullies a cat and mouse to supply him with meat. He finally acquires all he can eat, and ends up in the hospital miserably distended, barely able to breathe. The cat and mouse reappear and utter the chilling last line "This time we didn't forget the gravy!"
This happened to Clifford and his friends when they ate too many dog treats in "Tummy Trouble".
Frankie the chihuahua suffers one in his debut episode.
The Codename: Kids Next Door episode, "Operation: N.O.-P.O.W.U.H". also had this happen to Numbuhs One, Three, Four, and Five after they were force fed Gramma Stuffem's food, before Numbuh Two showed up and proceeded to eat the food. It also happens to Numbuh Two later on in the same episode, though not quite as severe as his teammates.
Max Fleischer's Color Classics: The short "Snubbed by a Snob" plays this for drama when a thoroughbred colt pigs out on apples and drinks so much water that his belly reaches the ground. Spunky is amused by this until he has to save the nearly immobile colt from a raging bull.
In the Courage the Cowardly Dog episode "The Transplant", Courage defeats Kangaroo Eustace by feeding him croissants until he's too heavy for Eiffel Tower, and falls into the river. (Feeding it over the course of a minute, of course.)
This also happened in the episode "The King of Flan".
Eustace also gets one at the end of "Dome of Doom".
Jay Sherman from The Critic. He has one in a photo inside his girlfriend Alice's diamond locket, and gets one from eating a giant bagpipe-playing potato.
Tod gets one after eating at his aunt's house in one episode of the Hanna-Barbera series Devlin.
Drawn Together had a somewhat disturbing example, in an episode in which Toot fattened up to immobility.
In an early Ed, Edd n Eddy episode, "A Glass of Warm Ed", Ed sleepwalks and eats the other neighbor's food, giving himself a huge belly. Eddy then starts a breakfast business by retrieving the eaten food from Ed's stomach for the kids to eat.
All 3 Eds get Balloon Bellies in a return from a commercial break after eating a huge sandwich together. Edd falls flat on his back at the end.
In the episode "Stop, Look and Ed" Sarah and Jimmy both get huge balloon bellies eating a mountain of ice cream while sliding down it.
The Fairly OddParents! episode "Just Desserts". Timmy wishes every edible in the world was dessert, and after a month, everybody balloons to ridiculous proportions, which becomes a big problem because all that combined weight causes Earth to hurtle towards the Sun!
Also occurs to separate characters in a few other episodes. Chester in "Birthday Wish", Timmy in "Truth or Cosmoquences" and Timmy's Secret Wish!, and Cosmo in "Mission Responsible"
In the Family Guy episode "Da Boom", Peter eats a whole year's worth of dehydrated meals, and then drinks a glass of water. Squicky hilarity ensues.
Peter: Everyone leave, I have to poop. ...NOW!!
In the Foster's Home for Imaginary Friends episode "Cookie Dough", Madame Foster bakes some cookies that Frankie apparently can't resist. When Bloo starts his plan to make them and sell them himself, Frankie takes advantage of this and spends the rest of the episode stuffing herself silly or getting her hands on more. During the credits, it shows Frankie stuffing her face with cookies and downing entire milk jugs before zooming out to show her inevitably enormous belly.
Bloo gains a Balloon Belly in multiple episodes. In "Hiccy Burp", in order to purposefully get the hiccups Bloo has Mac stuffing his facing, leaving him dazed and holding his bloated belly in the next shot. In "Squeeze the Day", he and Mac raid the refrigerator and eat just about everything inside, though only Bloo gets the Balloon Belly. A similar scene happens in "Imposter's Home For Um... Make 'Em Up Pals" with John McGee alongside Bloo, though his Balloon Belly isn't nearly as exaggerated as Bloo's.
Professor Farnsworth and Leela from Futurama both sport balloon bellies after swapping minds with Amy in the episode "The Prisoner of Benda". On Leela's fat body, Hermes remarks that she makes Fat Albert look like Normal Albert. Then Hermes swaps minds with Amy, who inverts the trope after witnessing Fry and Leela making out in Zoidberg and Farnsworth's bodies.
This happens to Jon at one point as well, leading to a Diet Episode.
George of the Jungle (2008): In the episode, "George Skips Breakfast", George kept his friends hungry throught the episode, and then when no one was around George ate his breakfast and got really fat (however he was more round around his body than his belly). But the others come back so hungry that they literally eat the dirt and trees around George, gaining really big bellies.
George also gets one when entering a pie eating contest.
It happens a lot in season 2.
Pete has a memorable one in the Goof Troop episode "Calling all Goofs".
Has happened to Billy numerous times in The Grim Adventures of Billy & Mandy. Two particular examples are in "Underfist" where he turns into a virtual ball from consuming a giant made out of candy and in "A Kick in the Asgard" where it happens to him twice. The first time from drinking from a endless fountain of nectar for several hours to try and empty it and the second from feasting Valhalla to the point where partially eaten food is seen sitting at the back of his mouth because no more can go down his gullet.
2 Stupid Dogs had a trilogy of episodes where the mutts kept bumping into Little Red Riding Hood, who would then lead them on a search to find her grandmother's house. In one episode, they find themselves at the candy house from Hansel and Gretel, whereupon the witch hands the dogs various foodstuffs, demanding that they feed it to Red. One by one, the dogs toss them down her mouth into her stomach. A caption then suggests that this assembly line continues non-stop for two years and eight months, leaving Red enormously stuffed.
Oddly the two instances of carnivore in these episodes - Red and the dogs eaten by the witch and Granny eaten by the wolf - don't feature this, but the episode "Las Pelotas" does. Little Dog eats a compressed Big Dog, thinking it's a ball. Big Dog then returns to his normal size while inside Little Dog, seemingly filling out every part of his body.
In the Charlie and the Chocolate Parody episode of Hi Hi Puffy AmiYumi, Ami and Yumi get a job at the "Wacky Wally" candy factory, and as soon as they're allowed on the factory floor the girls proceed to eat everything in sight. We soon see them lounging happily on a bed of chocolate, both with full, bulging stomachs. (their reprimand was not quite as strict as it should have been).
In the episode "Rock N Roe", Ami and Yumi eat all the sushi at an all-sushi-you-can-eat buffet and both get full, big bellies.
Invader Zim has some form of bloating in almost every other episode (For example, GIR swelling up to a Godzilla-sized proportion after eating too much candy); the creator is known to think morbid obesity is funny.
In "Zim Eats Waffles", GIR force-feeds Zim his waffles throughout the episode, resulting in his belly looking a bit round.
Happens to Jimmy, Beezy, and Heloise when they discover Lucius' private chocolate reserve, and the trio's greedy usage leads to them all becoming extremely obese.
Also happens in the episode "The Product Tester" when Jimmy and Beezy have to eat several massive vats worth of ice cream that Lucius needs disposed.
The KaBlam episode "Sasquatch-Ersize!" features Henry and June having to get fit due to them being overweight couch potatoes and eating too much (practically any food they saw in that episode).
Happens to Quack Quack on the Kaeloo episode "Let's Play Superpowers" after he eats 712 pots of yogurt.
The Kim Possible episode "Grande Size Me" had to do with Ron only eating food from Bueno Nacho, but then starts eating anything he sees. Over the course of the episode, he started to get much fatter.
Also, often played straight whenever Rufus eats at Bueno Nacho.
In Sequel SeriesThe Legend of Korra episode "The Spirit of Competition" Pabu, the Weasel Mascot gets one after joining his owner Bolin for a night of binging on noodles. (And while Bolin is a thickly built fellow to begin with, and wasn't seen from angles that made it any too clear, he looked a bit bloated himself.)
The Life and Times of Juniper Lee episode "Magic Takes a Holiday". Monroe gets one by stuffing himself silly and despite being bloated, continues to eat throughout the episode. During the credits, he tries to burn the excess weight by running on a treadmill.
In Lilo & Stitch: The Series, this happens to Lilo, Pleakley and Stitch when they activate Experiment 062 (nicknamed Frenchfry), after Nani restricts Lilo's diet to health food. All the food Frenchfry makes not only blows the characters up like balloons, but never makes them feel full, leaving them always hungry. In the end, they find that he is secretly fattening them up so he can eat them (he reforms later after finding Nani's health food is just as delicious).
The Daffy Duck cartoon "Holiday For Drumsticks". Daffy convinces a turkey to starve himself to avoid becoming Thanksgiving dinner, while Daffy stuffs himself on the food meant to fatten up the turkey and becomes massively bloated - and is then unable to hide or even run from the farmer come Thanksgiving.
It happens to Bugs again in an episode of The Looney Tunes Show when he hires Porky Pig to cater his parties, serving various foods cooked in way too much butter. Everyone, even Porky, points out he shouldn't be eating that kind of food all the time, especially when he ends up tripling in size.
On MAD SpongeBob eats too many Krabby Patties. In a later episode, Yogi Bear eats a whole picnic.
Happens twice to Brattus in the second act of the episode "Beach Blanket Bogus". The first time when Bogus allows him to eat the sausage link that they acquired from the dog. The second time was when he eats an entire cake.
The third act of the episode "Bogus In Bogus Land" had this happen to Bogus again. He hides at the bottom of an ice cream that a girl is about to have, when the girl wants 5 scoops of ice cream. Before the girl can eat the ice cream, however, all 5 scoops suddenly disappear into the cone (thanks to Bogus), which causes the girl to scream and drop the cone. Afterwards, Bogus then lifts up the cone while laying on the ground with an enlarged belly from eating the ice cream.
The second claymation short shown before the episode "Computer Intruder" had this happen to Bogus again after eating an entire container of Food Pills and drinking the entire vial of water used for the rehydration process. This causes Bogus to become massively bloated, making him look like a big fat blimp.
Happens three times to Bogus in the episode "Babysitting Bogus". The first time in the first act, where Bogus dreams that he's eating ice cream cones that he's juggling, the second time at the end of the second act where he devours an entire cheeseburger, and the third time in the third act where he drinks an entire pitcher of fruit punch to cool off his mouth after inadvertently sucking up a bowlful of chili peppers, though it goes away after that's over.
This happened twice in the episode "Bad Luck Bogus", the first time near the end of the first act when Bogus inflates himself like a balloon as a tactic to get rid of the ugly clone who was menacing him, and the second time in the second act, while he was eating a huge Dagwood Sandwich, to which swallowing one layer of the sandwich (which was a single slice of cheese) caused Bogus' belly to become briefly bloated.
A claymation short used near the end of the episode "Totally Bogus Video" had Bogus wind up getting inflated like a balloon when attempting to plug up a leaky tube with his finger.
Another episode had Bogus and Brattus gorge themselves on an entire submarine sandwich after taking care of Ratty and Mole and a group of tough biker rats in the first act, which results in Bogus and Brattus both gaining full, big bellies, due to their overindulgence.
Bogus gains another one after slurping up a strand of spaghetti that was dangling from Tommy's fork in front of him in the second act of the episode "Nightmare On Bogus Street".
The beginning of the episode "The Bogus Invasion" had Bogus gain another Balloon Belly, though he only gains it after he hiccup-burps after eating some food.
My Gym Partner's a Monkey: In "Chew On This", Adam has the food court sell human food and all the animals quickly get addicted. The animals gain permanent weight and are shown jogging at the end of the episode, trying to burn it off.
One notable example was from Grossery Shopping where he gets a huge Balloon Belly at the end.
Another example was from Attack of the Cownibals where Buck and Derrick get swollen bellies after drinking gallons of milk.
Despite being a robot, Jenny from My Life as a Teenage Robot has had this happen to her. For example, in "Labour Day", her body swells from electricity overload until her belly bolt pops. "Pajama Prank Party Palooza" showed she actually had a built-in water tank made to resemble one, which she uses to drink an entire lake dry.
In the pilot episode, Twilight Sparkle is overseeing preparations for the annual Summer Sun Celebration. One of the tasks on her checklists involves visiting the owners of Sweet Apple Acres, who are in charge of the food. Applejack (and her enormous family) invite her to brunch. Gilligan Cut to her walking with a bulging belly, groaning, "Ugh...I ate too much pie..."
Played to disturbing effect in a 1937 cartoon short Pigs Is Pigs, in which a greedy piglet, as implied punishment for being so gluttonous that he makes his family go hungry some nights without remorse, is strapped into a machine and force-fed until his stomach distends grotesquely. As the payoff, he can't resist just one more bite of food when he finally has the window to escape...and explodes. Thankfully, it's All Just a Dream. (Not to be confused with the 1954 Pigs Is Pigs, which is a hilarious and adorable classic and not squicky at all.)
A Halloween episode of The Simpsons has a deliberate homage to "Pigs ...", where Homer goes to Hell and is force-fed donuts while strapped to the same "Feed-A-Matic" chair. The Devil is frustrated when a stuffed Homer happily says "More!" between mouthfuls. Matt Groening has said that the "Pigs is Pigs" scene is his favorite sequence in animation history.
In the Popeye cartoon "What, No Spinach?" A huge safe full of food is busted open in a fight and Wimpy rushes into it - then at cartoon's end waddles out with arms full of food, hugely distended, and still eating.
Salem also has one in a different episode when he gorges on a ten-year supply of chocolate.
This has happened to Shaggy and Scooby more times than man can count. In some cases, they can instantly shrink down to normal when they get scared soon after eating.
An episode of Schnookums And Meat had the titular duo gaining these as the result of their lavish lifestyle and having to lose it before their owners get home.
In a Sesame Street animation, a frog eats a fly and gets pretty big.
In an early episode of The Simpsons, Bart imagined stuffing himself with chocolate until getting a balloon belly. In later episodes, this would actually happen several times with Homer, most famously in the Donut Hell scene of "Treehouse of Horror IV".
Also happens to Patty and Selma after a banquet.
Caitlin gains weight in the 6teen episode Girlie Boys, after gorging herself in chocolate. She ends up looking heavily pregnant and doesn't even realize she was gaining weight until she had difficulty putting on a pair of jeans, and had she not gone to the fitness center to lose it, the weight would have most likely been permanent.
Jude gains a temporary one after gorging on fries in "Over Exposed".
Spongebob Squarepants had this happen to Squidward when he over-indulged his new craving for Krabby Patties:
Squidward: What's gonna happen? Am I gonna blow up? Spongebob: No, worse! It'll go right to your thighs! Squidward: My thighs...? [new shot shows his tentacles have expanded to impossible proportions] Spongebob: And then you'll blow up!
This was apparently a well-known dilemma for the paramedics.
An earlier episode has Spongebob accidentally feeding Squidward tons of Krabby patties... the shape his stomach acquires, however, is not that of a balloon.
Stanley and Mary-Jane both get one in the first episode of Staines Down Drains after eating a giant, mutant, teddy-bear cookie.
Mario gets one in "Karate Koopa" when gorges on so much pizza, he asks for two black belts.
In "Little Red Riding Princess", King Koopa wearing a scuba suit attempts to kidnap Princess Toadstool. However, she escapes easily by releasing the air in his tank, causing him to expand rapidly and float upward.
Occurs a few times in Teacher's Pet. In "Movin' On Pup", Leslie has one after having too much for breakfast, in "Never Take Candy From a Kindergartener", both Leonard and Spot get them from eating too much candy, and in "Don't Make My Brown Eyes Green", Scott gets one from drinking too much water.
Subverted in the film adaptation of ''Top Cat, in the scene where Dibble returns to the alley to alert TC and his gang that the villain became Chief of Police... after the gang had a celebration going. It may or not be visible to you, but if you've got a good eye and can compare other scenes TC is in, take your pick (Go to 0:23:00). He does however, state he feels sick from eating too much having partied.
Tiny Toon Adventures had this happen a few times, notably Superbabs in one episode. Her weakness was carrot cake; she couldn't resist it...
This seems to happen to most of the Total Drama girls at some point.
Both Heather and Gwen got a little chubbier after eating a massive buffet in "The Big Sleep".
Leshawna's stomach bloats up with gas to the point of looking (and feeling) pregnant after drinking a couple of Chef's bran smoothies in "Full Metal Drama".
One of the first highlights in the TDA Special is Heather gaining three ounces, with a close up of a bit of baby fat on her stomach.
Another highlight is Harold gaining weight to "expand his diaphragm" to become a better beatboxer.
Lindsay gets one to the point of looking pregnant in "The Am-AH-Zon Race" after stuffing herself silly with bananas as a reward for a challenge that she won.
Blaineley also gets one in "Aftermath Aftermayhem" to relieve her bodily gas by burping and farting at the same time (though some argue that this was actually her natural size).
Happens to Clover in an episode of Totally Spies! after eating several boxes of addictive cookies..
The Twisted Tales of Felix the Cat had this happen to Felix in the episode "Noah's Nightclub" after drinking a flood. His girth returns to normal after a visit to the men's room.
In the VeggieTales in the House episode "You, Me & Tiny Pea", Larry gets one as a result of eating a huge pile of marshmallows in an attempt to prove to Bob that he is grown up.
In the Wally Gator episode "Tantalizin' Turnips", Wally tries to escape from Swampy Waters by hiding underwater. This backfires when Swampy simply drinks all the water with predictable results. The next shot we see of him he's back to his normal size with no explanation how, nor why his shirt turned green.