Okay, so you've never watched Avatar: The Last Airbender before. You are watching a random episode and this Aang character has entered the Avatar state. The odds that a Curb-Stomp Battle is about to occur? Even money. (The odds that something awesome is about to occur are about 9:1 in favor.)
The first six minutes of "The Earth King." It's basically nothing but Aang, Appa, Sokka, Katara, and Toph vs. pretty much the entire Earth Nation army around the Earth King's palace, and not only these four humans + one flying bison pounding the Earth Nation's soldiers into the ground, they're doing it while barely slowing down and apologizing the whole way, or least Katara and Sokka. By this point, it's clear that Aang and Toph have had enough.
The end of "The Siege of the North." Avatar Aang + pissed offLa vs. the entire Fire Nation invasion force. It ends badly. For the invasion force.
All of the Order Of The White Lotus vs the Fire Nation Army. And the Fire Nation was powered up by Sozin's Comet at the time! Granted, a couple of the White Lotus members were also powered up by the comet, but since they were already incredibly strong in the first place, it just turns into even more of a curbstomp.
Bumi vs. the entire Fire Nation force occupying his city. It was during an eclipse when they were powerless, but it was still several hundred to one. The Fire Nation ran away!And he threw a gigantic statue after them!
In their first on-screen battle, Azula defeats Zuko very easily. Then Iroh shows up, and he beats Azula even faster than she beat Zuko. Well...after defeating about a dozen elite firebending soldiers first.
Iroh also had one against Zhao and a group of soldiers. Zhao wisely ran after watching the retired general one shot his men.
Tenzin, Korra's Mentor in Airbending and the world's only Airbending master at present, plus Aang's son, gets ambushed by Chi Blockers. He then shows just what a true Airbending master can do by beating the stuffing out of them in seconds. Even when his arms and legs get tied, he simply whips up a freaking tornado as a Finishing Move!
There is a good reason why fights that involve Amon tend to end with the other party cowering on the floor. Highlights include beating an electricity-shooting crime boss at an equalist rally, decimating Korra, who for some reason thought Amon was obligated to stick to a one-on-one duel, and successfully orchestrating a terrorist attack on an arena under guard by the metalbending police force (plus Tenzin).
Season 3; Zaheer brutally beats down everyone he faces off against, from White Lotus guards to Dai Li agents. The only person to ever give him trouble is Tenzin (he still wins due to the rest of his gang intervening), and he even managed to outlast a very pissed off Korra in their final battle.
Like Amon, Kuvira has shown an acute talent for stomping anyone who fights her into the dirt, including a gang of 20+ bandits, Korra herself (who was not back to full fighting capacity, but still), her mentor Suyin, and the entire United Republic army once her Humongous Mecha is up and running. The closest she's come to losing was when Korra entered the Avatar State in their fight, and she still won due to Korra's Enemy Without interfering.
Not to be outdone though Korra manages to get her own back at Kuvira in their rematch at the series Grand Finale. While Kuvira still holds her own fairly well during the fight its pretty clear that Korra is beating her by a clear margin, dodging virtually all of her attacks and managing to strike back with her own, all without going into the Avatar State. Keep in mind their both in a room full of metal and Kuvira is still on the defensive throughout the majority of the fight. This is best demonstrated after the Colossus is destroyed Kuvira manages to (briefly) get away from Korra by throwing a rock at her face but is shown limping and holding her side, meanwhile Korra seems perfectly fine and unaffected by the rock more surprised then anything.
Beavis And Butthead: Anytime the boys try to fight someone other than each other, it usually doesn't end well. Especially if it involves Todd or Mr. Buzzcut.
Mr. Candy vs. Mr. Buzzcut pits a limp wristed candy salesman who could barely hold his own in a fight with hippie teacher Mr. Van Driessen against a former US Marine who fought in the Vietnam War. No points for guessing who won this "fight".
In Ben 10: Omniverse, Ben get's attacked by a rival superhero team who call themselves The Vengers. He turns into Brainstorm and proceeds to use Awesome by Analysis in order to take them down one by one. In a match between two Iron Man expys, a robotic cheerleader, and an evil genius, Ben doesn't receive a single scratch.
Entirely serious and intentional example: The Boondocks spends an entire episode leading up to a fight between Granddad and Stinkmeaner, an old man that was able to kick Grandpa's behind despite being blind. Right before the fight starts, Huey realizes that Stinkmeaner didn't have superhuman sense and fighting ability, he just got lucky when Granddad accidentally nudged Stickmeaner's cane with his foot. Granddad throws the first punch, time stops for a minute for Huey to suggest everyone go read a book, the punch gets Stinkmeaner directly in the face, knocks him down, and he's dead seconds after hitting the ground.
One episode of Celebrity Deathmatch pitted Bigfoot against the Loch Ness Monster. Everyone present was expecting the longest, most epic bout in Celebrity Deathmatch history. Nessie won in six seconds.
In Gandhi vs. Genghis Khan, Gandhi destroys Genghis Khan before Genghis even attempts to attack.
Subverted with David Spade vs. Steven Seagal, in which Spade spends most of the match shivering and getting pummeled, and in the whole battle he only gets in one hit... the winning one.
A similar thing happens in Steve Irwin vs. Medusa where Steve doesn't even try to fight until he rips Medusa's head off.
Buster Keaton gets a pretty one-sided victory over Charlie Chaplin as well.
Andre Agassi vs. Tiger Woods. Tiger never gets any offense in.
Cameron Diaz vs. Meryl Streep was intended to be staged with Streep as the loser, but Streep takes her role too seriously and wipes the floor with Diaz.
Richard Simmons vs. Billy Blanks. Simmons only gets one hit, which does no damage.
Taurus Bulba easily smushes Darkwing during their first combat.
DC Showcase: Superman/Shazam!: The Return of Black Adam had title bad guy Black Adam defeat Superman in single combat, then fight both Superman and Captain Marvel at the same time, and only lose once they started getting their teamwork down. Then Adam forces a Sadistic Choice on Captain Marvel, between Cap's life or the life of a hostage Adam had. Naturally, being perhaps the biggest nice guy boyscout superhero around, Cap chose the life of the hostage over his own and surrendered, transforming back into Billy Batson. Then Adam tried to kill both Billy and the hostage at the same time, but was prevented from doing so by Superman. Billy was not amused. One magic word later and the beatdown Captain Marvel laid into Adam was as profoundly satisfying as it was one sided.
DrawnTogether: In "Mexican't Buy Me Love", the arena fights between Ling Ling and fight roosters are so one-sided that Ling Ling eventually calls it quits, since it goes against his codex of honor.
Nearly any instance the Urpneys go against the heroes (or even just hero) in The Dreamstone ends rather badly for them. Even the one time Zordrak went against the Wuts he was pathetically outsmarted. Oddly reversed a couple of times (in "Albert's Ailment" the Urpneys quickly restrain the Noops when they attack them for stealing the stone, while in "The Spidermobile" they pretty much outpower the entire Land Of Dreams with their mech).
Justified according to Word of God. He said that Eddy's brother has always dealt abuse while never having any on him. So whle Eddy built the endurance to take huge amounts of punishment, an unremarkable (by cartoon standards anyway) action of unscrewing a door hinge leading to said door slamming onto him due to Eddy holding on for dear life.
Exo Squad, whenever there are significant numbers of Neo Warriors, victory tends to lean in their favor against the Exoframes used by Exofleet due to their durability and regeneration. Hell, right after the Australian Resistancecurbstomps the occupying Neo Sapien forces in Australia, they are in turn curbstomped by the Neo Warrior Counter Attack. Then there is the Third Battle for Venus where General Shiva, under Phaeton's Orders, tries to invade Venus or destroy the Resolute II again. Despite destroying several frigates, the Neo Sapien Fleet is completely overwhelmed, Shiva dies, the Flagship is destroyed, and several carriers, battleships, and carriers are destroyed by Marsh's flanking maneuver. What's left-which isn't much, limps back to Earth, leaving the way open for invasion.
On Family Guy Meg goes to prison for a few months and comes back a hardened badass who beats the living crap out of Peter and gives him an actual curb-stomp (or "stairstomp" in this case).
In "Believe It or Not, Joe's Walking on Air", Peter, Cleveland and Quagmire gang up on Joe to try and re-cripple him. It's two fat guys and a scrawny womanizer against a buff, athletic cop with martial arts training. Needless to say, Joe doesn't get hit once.
In "Screams of Silence: The Story of Brenda Q.", Quagmire urges his sister's abusive boyfriend to challenge him mano y mano. By the end of the fight, the bloodied up Quagmire was only able to lay on a single punch.
''Futurama: "Hello and welcome to a remarkable championship bout. Destructor, a robotic armoured tank, whose very use at battle has been ruled a war crime, versus Gender Bender, who wears a pink tutu."
George Foreman: This might be the most one-sided fight, since I fought an 80-foot tall mechanical Joe Frazier. Now, my memory's not what it used to be, but I'm pretty sure the entire Earth was destroyed.
In the Gargoyles episode Ill Met by Moonlight, Oberon goes up against Goliath, Angela, and Gabriel all at once - and hands their asses to them. To add insult to injury, he was only using a fraction of his full power. Had he not been vulnerable to iron, they probably would not have survived the battle.
In the "Fight Fighters" episode of Gravity Falls, Dipper really didn't stand a chance against Rumble, and only got a single and ineffective hit in the entire fight.
Rumble himself was in the receiving end in "Soos and the Real Girl" where he got fried by Giffany.
in the penultimate episode the Humanoid forces, sporting ships that can destroy planets combining themselves, mop up the floor with the fleet of Cassiopeia that includes the Nautilus-class heavy cruisers, before in the series being considered the most powerful warship class known.
Justice League: Aquaman and Wonder Woman have a duel on Easter Island. The fight is totally awesome and shows how badass the king of the sea is. He barely wins. Then he pushes his luck and tries to go after Superman... Supes gives a depressed sigh and throws just one punch. Cut to Superman dragging Aquaman's unconscious body away, with a recovered Wonder Woman right behind them.
General Eiling absolutely destroyed Stargirl, S.T.R.I.P.E., Vigilante, and Shining Knight after his transformation in Unlimited. Shining Knight refused to go down, though.
Amazo in "The Return". "I have evolved far beyond what I was when we last met. You do not want to challenge me." He pretty much decimates the entire Justice League, casually. And even moved the planet, the planet Oa to another dimension because he didn't feel like going around it.
In "Grudge Match," Black Canary, Vixen, Huntress, and Hawkgirl go up against a mind-controlled Wonder Woman. The four of them get some licks in, but for the most part Wonder Woman tosses them around like ragdolls.
And of course, there's the disappointing showdown between Princess Celestia and Queen Chrysalis in "A Canterlot Wedding".
In Twilight's Kingdom Part 2, Twilight and Tirek's first fight is evenly matched, but once the Mane Six get their hooves on the Rainbow Power, a few beams of magic is all it takes to shrivel and seal up Tirek once and for all and get Celestia, Luna, and Cadance back from Tartarus.
The Rick and Morty episode "Interdimensional Cable 2: Tempting Fate" features a brief clip of a game show called "Man vs. Car", in which a burly guy fights to the death against an ordinary car. Naturally, the car wins, and one of the announcers even makes an offhand comment under his breath about how ridiculous the concept is.
Announcer: I mean, wouldn't the cars win every time?
The titular character does this rather well in the episode "The Princess And The Bounty Hunters" After spending almost the entire episode telling how they would individually take down Jack, the said princess advises they join forces to bring him down. After laying out a seemingly perfect trap, they all hide under the snow. They all spring on Jack as he walks by... and he takes them ALL down in less time than a drop a water from a melting icicle can hit the ground.
Another example would be in Season 4 Episode 3, "Samurai vs. Samurai". A loud and obnoxious bully of a man simply called "Da Samurai" comes into a tavern where Jack is staying, and when he learns who Jack is, challenges him to a fight. Now, Da Samurai did show that he had some measure of fighting ability, so he wasn't all talk...only mostly, especially compared to Jack, who subdued the poser without taking a single hit, using only a freshly cut staff of bamboo. And then he singlehandedly decimated an army of robot assassins with the same bamboo.
This happens to Jack in Jack and the Traveling Creatures. When he comes to the time portal he sought, Jack faces its Guardian, a foe that is faster, Made of Iron, has had "eons" to hone skills with pretty much any weapon imaginable, and has a Hammer Space arsenal full of said weapons. At first it seems Jack has a chance, until he wrecks the guy's suit and it becomes clear he was Just Toying With Him. Cue the beating to end all beatings, leaving Jack unconscious and helpless; he only survives because the Guardian spared him at the portal's command.
This also happens in the episode "Jack in Egypt". The Minions of Set ambush Jack out of nowhere and almost kill him in just a few seconds. Their agility, fighting prowess, immunity to Jack's sword and phenomenal teamwork make it clear that Jack has no chance of ever defeating them through any normal means. Their fighting style is so vicious it crosses the line into a No Holds Barred Beatdown at times.
Episode 2 of Season 5 has the new and improved Beetle Drone show up to fight Jack. He dispatches it simply by throwing a spear at it.
It happens to him later in the same episode: he runs into the Daughters of Aku, and thanks to the element of surprise, Jack actually gets the tar beaten out of him. They destroy all his equipment, stab him in the side, and he only barely escapes with his life. The only thing he managed to accomplish is killing one of them with a lucky slash to the throat after a hard won battle, and he's left traumatised afterwards. Then in the next episode, he recovers and gets payback - two of them are killed before they have any idea what's going on, one gets shanked on her own sword, and the others get thrown over a cliff. Only one (Ashi) survives.
The Final Battle with Aku is the 50 years more powerful and experienced Jack vs Past!Aku directly after their first fight. Aku doesn't stand a chance.
The only real dramatic tension in Hanna-Barbera's Shazzan comes from seeing if the two kids can summon Shazzan in time to deal with the threat of the week. The moment they do, it's over for the bad guys. Throughout the series, Shazzan proves again and again that he is the most powerful magical being in the setting. Even when his opponents are ostensibly in the same class as him (such as a powerful demon and a fellow genie), Shazzan is completely unthreatened. Shazzan not only beats his enemies every time, he does it easily and with the same big smile on his face.
The best curbstomp in that series has to be when Shazzan dispatches a wizard who controls a powerful fire demon and the demon itself, telling the fire demon to 'go back to the dimension where it came from and take its master with it'. Now, what dimension DO Fire Demons come from? On the flipside, the genie actually once chastises the kids for summoning him to beat a local street magician just to show he could.
In the South Park episode "Stanley's Cup", The South Park Peewee Hockey team ends up playing the Detroit Red Wings. This doesn't end well.
"Going Native" starts with Cartman reporting an offscreen curb stomp; Butters snapped and beat the hell out of a diabetic kid.
Spider-Man vs the Sinister Six in The Spectacular Spider-Man. Peter Parker in the Black Suit while sound asleep utterly decimates the ENTIRE Sinister Six.
Star Wars: Clone Wars: Grievous spends most of his time stomping Jedi, but his fight with Mace Windu lasted two seconds — in the first Windu used the Force, in the next Grievous was lying on the floor.
Darth Sidious vs Darth Maul and Savage Opress is implied to be this by most fans. The series itself heavily implies that he could have killed them at the outset if he wanted to, but found a fight against them amusing. Considering that it was the first time ever in the series actually seeing Sidious leave the comfort of Coruscant and personally take matters into his own hands also counts as a Crowning Moment of Awesome.
As a general rule of thumb, due to Superman being one of the most powerful superheroes, whenever one of his A-list villains show up, they have a tendency of stomping other superheroes and scoff at anything less than the Man of Steel, and usually they could only be defeated by Hoist by His Own Petard or Superman's timely intervention.
On an episode of Super Powers, when a visiting Mxyzptlk sees the JL race out to stop some ordinary bank robbers, he lampshades the overkill of this curbstomp.
The first battle between the Shredder and the Turtles in the 2012 Teenage Mutant Ninja Turtles series. Four against one, and the Turtles still get their shells handed to them. It was only due to luck and a momentary distraction by Shredder's own henchmen that the Turtles were able to escape with their lives.
Splinter vs. Leatherhead. Splinter wins.
Splinter then goes on to own the Rat King with only two fingers.
Beast Boy is also able to curbstomp Slade himself when Terra is on the line.
Red X, in his first appearance in the series as his own character, effectively curb stomps the Teen Titans the first time he fights them. All of them. At the same time. With the exception of Robin, they don't fare much better against him for the rest of the episode.
He does it again in "Revved Up" when he takes on nine supervillains in their tricked-out, weaponized vehicles and destroys every single one of those vehicles. In forty seconds. In style. And not with his own motorcycle, either. That was destroyed, so he jumps from vehicle to vehicle instead while they're moving at speeds in excess of 100 mph and takes them out that way.
In the episode "Final Exam", HIVE students Mammoth, Jinx and Gizmo make their entrance by Curb-Stomping the Titans twice, firstly in a fight in the street, then in Titans Tower itself, taking it over. The Titans then return the favour, taking back the Tower in the process.
In "Omens Part Two" Thundera's Cats are laid siege to by Lizards. The Cats have bows and arrows and a bit of sorcery. The Lizards have laser rifles, Sticky Bombs and Walking Tanks that shoot missiles. The Cats lose their kingdom in one night. They have a Hope Spot thanks to their Clerics and the Sword of Omens, but the appearance of The Dreaded ancient evil Mumm-Ra takes care of both.
In "Song of the Petalars" the Thundertank takes down four Walking Tanks without taking one hit, prompting a full-scare retreat of what remains of the Lizard Army.
Beast Wars has the epic moment where Megatron and Rattrap dramatically gear up for a fight with each other, complete with close up shots of their narrowing eyes and intense music, they charge at each other both clearly ready for an epic battle in their new Transmetal forms... and Rattrap proceeds to comically trip Megatron causing him to go flying headfirst into a rock.
Considering Megatron has every advantage from a physical standpoint, the only way to beat him is trickery, which Rattrap's got plenty of.
Silverbolt in the episode Crossing The Rubicon delivers one to Tarantulas after getting his Berserk Button smashed with a sledgehammer.
In Transformers Cybertron Starscream once tried to fight a newly resurrected Primus. For the uninformed, Starscream is a fairly powerful Decepticon who transforms into a jet while Primus is a god who transforms into a planet.
Optimus Prime:This should be good. Starscream: Whoa, big guns... SLAAAAG!
It looked like it might go somewhere when Starscream suddenly grows huge by the power of the MacGuffin, but Primus turns some moons into maces and effortlessly slams Starscream into an asteroid.
And during the earlier Jungle Planet arc, Optimus Prime's Mid-Season Upgrade, Savage Claw Mode, turned many a fight into the more standard example, though villains eventually got upgrades as well and evened the score.
Also, there can be no forgetting Megatron vs. Metroplex. Metroplex literally stomps on Megatron, effortlessly dodges an attack on his legs, and then brings his giant axe down on Megatron's ugly head so hard that Megatron ends up in the bottom of a small crater in the floor.
The next floor, that is. He was pounded straight through the floor they were standing on and left a small crater in the floor below.
Worse than that still. Megs got knocked through two floors, leaving a crater in the third one down.
And then the following episode, Megatron evolves into Galvatron and returns the gesture by handily snatching Metroplex's axe and beating him unconscious with it. His Unstoppable Rage also takes out almost every other Autobot beforehand.
Another Cybertron example, this time with Starscream on the giving end. He once used Villainous Valor to defeat all twelve Autobots, including Optimus Prime in full battle mode, to gain possession of the Omega Lock and Cyber Keys.
In Transformers Animated, Megatron's first act upon restoring his body was handing all five main Autobots their tailpipes without breaking a sweat. His second was frying Starscream for damaging him in the first place. The Autobots only survived because they ran away while Megs was cleaning house.
The Autobot's first encounter with Blitzwing and Lugnut was going well until Bumblebee suggested Megatron was dead. Lugnut proceeded to level all five of them (and Blitzwing) with one punch. Granted, it's the P.O.K.E, but it's still impressive.
Then there's the famous "Starscream Death Montage", which is a montage of Megatron repeatedly and easily killing Starscream, who is immortal due to the spark fragment in his forehead.
The Transformers Prime Season 1 finale gives us the confrontation between Airachnid and Soundwave. Airachnid tries to usurp power for herself, only for Soundwave to stand up to her. The resulting fight is totally one-sided and ends with Soundwave's foot on Airachnid's head. Said stomp was the only time Soundwave actually moved his feet during the fight.
Optimus Prime's epic battle with Megatron in Prime contains one for each combatant. At first, Optimus unleashes an UnstoppableTranquil Fury and proceeds to beat the tar out of Megs, beating him down so badly Megatron's armor is ground away in several places and he's left nearly helpless on the ground, unable to comprehend his impending death. However, Megatron gets a Villainous Second Wind from the Dark Energon nearby.
Soundwave proves himself to be the master of this as the series goes on. In fact, there's only one fight with him that doesn't end like this.
The battle between OSI and the original Sphinx organization of The Venture Bros. lore: Sphinx is simultaneously annihilated and humiliated by an army of The Village People impersonators, who appear to have suffered no casualties. In fact, the concept of the Curb-Stomp Battle is parodied by how some of OSI's attacks clearly reference well-known war atrocities.
Also, just about any fight involving Brock Samson. One notable instance is at the beginning of ¡Viva los Muertos!, in which a large number of The Monarch's henchmen charge into battle at the Venture compound. Less than ten seconds after they run into a building, from the first-person point-of-view of one of the henchmen, we're shown that everyone is fleeing the scene and Brock is effortlessly destroying anyone not fast enough to get away, including the POV character, who gets his head turned completely around.
Winx Club: Enchantix Bloom had one with the Trix while Enchantix Stella had one against Chimera.
The way Scarlet Witch completely and utterly annihilates the X-Men in the X-Men: Evolution episode "The HeX factor" surely qualifies. Apocalypse nonchalantly wiping out Magneto by waving his hand also counts.
When Superboy is first released in the pilot, he (under the control of Cadmus genomes) takes out Kid Flash in a single punch, and after being slightly annoyed by Robin's taser does the same to him. Aqualad is the only one who actually manages to fight him evenly for awhile, although eventually Superboy takes him out too.