Rolly's stomach growled quite a few times, which makes sense considering he's a Big Eater. It happens to him in the episodes, "Home Is Where the Bark Is", "Purred It Through the Grapevine", "K is for Kibble", "Cruella World", twice in "Gnaw or Never", four times in "Chow About That?" and even on his character title card in the show's intro.
Spot’s stomach growls in the episode, “Market Mayhem”.
In the episode, “You Say It’s Your Birthday”, while the main pups are hiding on Captain Ahab’s ship, Cadpig’s stomach growls, making train noises and car revs instead of what it supposed to sound like.
In the episode, “Shipwrecked”, Lucky’s stomach growls, as does Scorch’s while their stranded on the island.
In the Adventures of Sonic the Hedgehog episode, "The Robotnik Express", Scratch and Grounder try to fool Da Bearz to thinking they're Sonic and Tails. At one point, Robotnik calls Grounder on the hotline that's placed inside of him. Grounder tried to get the bear who heard it to believe it was his tummy rumbling.
Da Bearz: That's the strangest tummy rumbling I ever heard. Scratch: Not really. It always sounds like that when Tails eats onion rings.
And at the end of the episode "Boogey-mania", a fattened up Tails' stomach rumbles as a result of eating too much.
On the episode, "Hunger Strikes", Dexter's stomach growls repeatedly.
It happens to Dexter again on the episode, "Now That's a Stretch".
It also happens to Timmy the Termite in the episode, "A Boy and His Bug".
In the episode, "Growing Pains", Dexter's Mom assumed this was the case when he heard a giant plant make a monstrous growl, and she thought Dad was hungry.
It also happens to Dexter repeatedly in the episode, "Critical Gas" after he had eaten a giant burrito. Throughout the episode, Dexter thinks he's going to die, but at the end of the episode just before he's about to reveal his secret lab to his parents, he lets out a really big fart that could be heard all over the galaxy!
On Dinosaur Train, this happens to Buddy and Tiny in the episode "I'm a T. Rex!", Don on "Jess Hesperornis", and Tiny again on "Tank's Sleep Over".
It happened to Goofy in the Disney cartoon, Tomorrow, We Diet.
This happens mostly to Ord due to having a huge appetite. Ord's tummy growls in about 10 episodes. The most memorable belly rumble Ord experienced was occurred in the episodes "Cassie Catches Up" and "Very Berry".
It happens to the other main dragons as well; Zak and Wheezie in the episode "Try It, You'll Like It", and Cassie in the episode "Knuck Knuck, Who's There?".
In another episode, Max complains that his stomach is making noises, but they're never actually heard.
In an episode of DuckTales, the gang is on a boat in the ocean on a search for a sea monster. Launchpad tries to convince everyone that the sea monster isn’t real. They soon hear the monster’s roars, and Launchpad tries to convince everyone that was his stomach growling, but no one believed him.
In the episode, "Johnny BC", Susan and Mary do everything they can to make sure Dad doesn't find out Johnny's been turned into a caveman. At one point, Dad hears Johnny's grunt, and Susan tells him that what he heard was her stomach growling.
Eugene's stomach growls in the episode that accompanies "Johnny's Winter Jacket".
Dukey's stomach growls briefly (as a sound effect) in the episode "iJohnny"
A lesser-known short cartoon by John Mac Intyre called "Kitchen Casanova" features a first time cook attempting to make a nice dinner for his date. While she's waiting, at one point, her stomach growls, and his dog growls back at it.
In the episode, "Door Jammed", Russell's stomach growls due to eating some bad kibble, yet this somehow gets Sunil and Vinnie to believe he's a werewolf. Later on in this episode, Zoe's stomach growls for the same reason, and she gets the same reaction from the other pets (except Russell).
Russell's stomach growls again in the episode, "The Nest Hat's Craze".
The same thing happens to him in the second act of the episode "Hipster Tripster".
This happens to pretty much all of the Muppet Babies on an episode of said show. In the episode, Nanny gave Gonzo some cookies to share with everyone else because lunch would be late, but instead, he keeps the cookies for himself.
Biff: Shut your stomach up! Chip: That wasn't my stomach, that was YOUR stomach!
Happens in a few episodes of Pink Panther and Pals
Happens three times to the Aardvark at the beginning of the episode "I Didn't See That Coming."
Happens to the Pink Panther two times at the beginning of the episode "Pinkaroni Pizza"
Happens to the Pink Panther four times during the episode "Pink Party of One."
Happens to the Pink Panther eight times throughout the episode "Shop-Pink Spree."
Happens to Aldo the gator in the CG children's series Sitting Ducks
Happens twice during the first episode "Running Duck"
Happens at the beginning of the episode "Peeking Duck"
Happens three times during the episode "Holding Pen 13"
When Aldo tries sampling duck food in the episode "Midnight Snack," his stomach starts growling continuously from indigestion while visiting Bill in his apartment, causing an explosion as seen from the outside.
This happens to the rabbit at the beginning of the Pixar short, Presto.
In the Cartoon Pocket Dragon Adventures this happens to Binky in "Attack of the 50 foot binky" and Filbert in "Another Fine Hex".
In the episode, "Lord of the Fleas", when the dogs feel the earthquake from the about-to-erupt volcano, Lucky tried to relieve the other dogs by saying it was his tummy rumbling. Everyone believed him except Cookie. It happens again later in the episode, but this time Lucky asked Cookie if that was her tummy rumbling, but she said that wouldn't be possible since she had butterflies in her stomach at the moment.
Niblet is actually prone to this trope, even though we never really hear it, Niblet and the other dogs do bring it up a lot.
In The Powerpuff Girls episode, "Reeking Havoc", this happens to everyone in Townsville overnight after they ate Professor Utonium's award-winning chili, for their stomachs puff up when they do this. The only characters we see this happen to are Professor Utonium, Bubbles, the Mayor, Miss Bellum, and Miss Keane.
Bubbles: Professor’s chili sure is rumbling my tumbly.''
On Regular Show, Rigby's stomach growls on the episodes "Free Cake" and "A Bunch of Baby Ducks".
This happens to Stimpy in an episode of The Ren & Stimpy Show while he and Ren are sleeping over at a haunted house.
The pilot episode, "Big House Blues", begins with a close-up of Ren and Stimpy's growling stomachs.
One episode features a flashback to the Simpsons as French peasants. Lisa and Bart complain that their stomachs are growling from hunger, but Marge points out that it's just two men outside speaking French.
Homer's stomach growled in other episodes as well.
Greedy in The Smurfs gets this when he goes hungry. In "Haunted Smurfs", Brainy gets spooked by the sound of loud growling in a dark mysterious castle, only to see Greedy passing by him clutching his stomach, implying that it was merely the hallway echoing it.
In the Sonic Sat AM episode, “Sonic Past Cool”, Tails’ stomach growls while he’s hanging out with Baby T. While we don’t hear it, he does act as if it happened.
Buster’s stomach growls while he and his friends are waiting in line for a restaurant.
It also happened once to Hampton on an episode where a chocolate cake was trying to get Hampton to eat it.
There's also an episode where Furball's stomach growls. Sweetie's stomach growls at the end the same episode.
There exists an episode entitled "Sawdust And Toonsil" in which in the beginning, Buster, Babs, Plucky, and Gogo ride bikes and slide down a rainbow, and when they stopped, they heard a train whistle, and Gogo thought it was his stomach growling over something he ate, which was actually coming from the train itself.
This happens on three different Tom and Jerry shorts, all of which were coincidentally from the Chuck Jones era. This happens once to Tom in "Filet Meow", Jerry in "Pent-House Mouse", and Tom again in "Advance and Be Mechanized".
Also happens to Tom in "Tom and Jerry go to Mars"
Happens a lot on Total Drama Island, usually to Owen since he is a big eater and has a bit of a problem controlling his bowelves.
Bridgette's stomach growls in one episode just before she goes up to do her hand stand for the talent show. Of course, the sounds of her stomach were due to nausea caused by her nerves. As a result, while she was doing her hand stand, she vomited all over the stage.
Owen's stomach growls as does Leshawna's in an episode where Chef Hackett takes over.
Harold's stomach growls on the episode where Chris revisits all the campers who got voted off.
Gwen's stomach growls twice on the episode, "Camp Castaways".
On an episode of Totally Spies!, Sam goes on a hunger strike. Her stomach growls periodically through the episode, which annoys Clover and Alex.
It also happens to Alex in the episode "Morphing is Sooo 1987".
Felix's stomach does this in The Twisted Tales of Felix the Cat two times (with teeth) in "Mars Needs Felix", Once in "Surreal Estate", and Once in "Attack of the Tacky". It also happens to a millionaire when he was broke and hungry in another episode.
Sometimes heard in Wakfu. At the start of season 2 episode 5, Yugo, Ruel and Sadlygrove's bellies are growling loudly and lengthily (even interrupting the background music), to the point Amalia complains.
Happens to a rabbit that Wander and Sylvia pass by at the beginning of the episode, "The Good Deed".
In the episode, "The Little Guy", Wesley's stomach growls twice.
Happens quite regularly to Winnie the Pooh, hence his catchphrases: "I'm rumbly in my tumbly" and "Do you have any honey?". In the 2011 film, it even appears to have a mind of its own.
There's an episode of Wobbly Land where Num-Num's tummy rumbles called "Wobbly Tummy". At first, he couldn't figure out what the noise was until he was told it was his tummy and why it was doing that. After he finally ate something, everyone else's tummies started rumbling.