A robot toilet is sent from the future (by future Eleanor) to stop the butt who destroyed the Earth. The Flushinator must stop Deuce. Zack tries to protect his pal and convinces the robot to spend a day with Deuce first to see how great he is. It naturally blows up in their face and Deuce sends the Flushinator right into the cheeks of the Great White Butt, setting the terrible future into motion. / Zack has become allergic to of all things – Deuce. The doctor puts Deuce in a sterile bubble so that the two guys can remain best pals.
Zack and Deuce decide the best way to have fun is with moustaches. And so they grow them some. Zack's is just a lone wispy hair, but Deuce's is a glorious, bushy 'stache. Soon, Deuce is mistaken for famed crooner, Jason Bumber, and he and Zack run with it, reaping the benefits of fame. But then, Deuce is forced to sing at the Great White Butt's surprise birthday party and Zack and Eleanor need to save him. / Eleanor and Deuce are squabbling. Again. And it?s ruining Zack?s life. So, to teach them a lesson, he glues them together with banned, super sticky gum to get them to co-operate and the only known solvent is the Albino Butt Orchid, found deep in the Crack.
The babysitter cancels at the last minute, just as Gran is headed to the knitting conference. But tonight is the Bummy Rippa butt-fighting movie marathon. Zack and Deuce convince Gran to leave her butt behind as a sitter. At first she's a drill sergeant, but then the gang teaches her to let loose and it gets way out of control as she throws a party. The gang tries to save the house – to watch Bummy Rippa movies. / Zack is given a comic book by a weird mystic who claims he is the Chosen One. Eleanor thinks it?s completely ridiculous. Zack sets out to perform the three heroic feats as per the prophecy in the comic to prove her wrong. Or right. Too soon to say really.
Zack and Deuce release a video of themselves beat boxing and it goes crazy viral. The Butts love it! But only Deuce. Soon, the Prince and Maurice take over the duo's management and fire Zack, driving a wedge between the two pals. Zack worries about the evil plan the butts have for Deuce, but the truth is, they?re just huge fans. / Silas Sterne tells the kids the story of Buttsquatch, the fiercest creature known to man and butt – and the one that got away. Zack says he‟s going to capture Buttsquatch to prove to Silas how awesome he is and so they hike into the Brown Forest to hunt the butt beast.
Zack is invited to participate in the famed Glutiator battle – with a partner! Deuce assumes its obvi him, but when Zack chooses Eleanor, Deuce is tricked into fighting alongside Maurice, leading to an eventual meeting in the finals in the toilet seat ring. Loser will be flushed! / Zack tries his hand at the art of disguise, but falls flat. Eleanor scoffs and Zack challenges her to see who can sneak into the gala at the Museum that night. Eventually, they all manage to get in only to discover that the Prince and Maurice plan to steal the Mabeltown Submarine Sandwich – the first sandwich ever shared between a human and a butt.
Deuce is fooling around in Silas Sterne?s weapon room. He and Zack had just finished a conversation about trust. And then Deuce goes and turns on a weird butt fighting orb that causes them to switch bodies! Zack is now Deuce and Deuce is now Zack. And oh, tonight just just happens to be the Spanky Awards where Zack is up against Eleanor for butt fighting rookie of the year. Ehn, it?ll probably be fine. He can trust, Deuce, right? / Harmony Day is the one day of the year where all humans and butts come together in the spirit of peace and togetherness – to squash someone! One unlucky human or butt will wear the golden plunger atop their head and roam through the streets until sundown, hiding from the entire town. And Deuce, totally misunderstanding Harmony Day, stuffs the ballot box with only his name so he?ll “win.” Now Zack has to protect his pal from the entire town, including the Harmony Day champion, Silas Sterne.
Zack and Deuce find the Flicker, the last remaining solider from the Great Butt War, still hiding in a bum shelter. Zack brings him above ground and tries to show him the war is over. Butts and humans get along now, dude. In fact, Zack does such a good job of convincing him butts are good, that the Flicker ends up teaming with the Great WhiteButt and his minions. Oops. / Silas Sterne makes a traditional butt fighter milkshake. It tastes terrible! But somehow, it makes Deuce a genius. Zack and Eleanor use his brain to have all sorts of fun including Deuce figuring out the Cheekburger special sauce recipe. But soon, words of Deuce's smarts spreads. A shake that makes butts smart? You can bet the Great White Butt wants himself some of that.
Zack and Eleanor have been kicking butt all over town. But a mysterious figure named the Dark Nugget has been swooping in and stealing all their glory. He doesn't do anything, but he's always there at the right time. Soon, he, along with Zack and Eleanor are captured by the Great White Butt. They unmask the Dark Nuggets as – ugh, Jonas Heinie, Zack's spoiled neighbour. Now they've got to work together to escape. / Zack, Deuce, and Eleanor have made it to the best of three Dodgebutt championships. But in the first match of the finals, Deuce goes psycho and nearly blows the whole thing! Frankly, he's been going psycho a lot lately. Zack and Eleanor take him to a yogi to Zen Deuce out, but it works too well. And on Eleanor too. Now they're both so chill that they don't even notice they‟re in a Dodgebutt game.
Every butt fighter had an animal sidekick it seems. So Zack wants one too. And when he and Deuce accidentally defrost a Dinosaur he figures why not him? But, it turns out having slow, giant dino around stinks. And so they ditch him and instead detach his butt. Who is awesome! The guys go have a great time with him until they give him a bag of Cheekburger burgers. Soon, the Buttasaurus develops a taste for Cheekburger secret sauce and goes on a terrifying rampage. Whoops./ The Mabeltown Butt Menace Meter breaks and the whole town, especially Eleanor, freaks! But Zack says not to worry. From years of hanging with his butt, he's honed his In-stink. He knows what the butts are gonna do, any time, any place. Soon, that power goes to his head as all of the townsfolk believe he's some sort of seer. But when it blows up in his face, suddenly no one believes him anymore. Y'know, right when the Great White Butt is about to invade.
Deuce receives an email that says he's the heir to the royal butt throne. Soon, he‟s crowned King Deuce and is given the keys to his bouncy castle. Zack, as his human, is the royal jester (although Zack interprets it more as “puppet master”). At first, Deuce is making all sorts of crazy proclamations and such, but soon they have to reap the ramifications. Being a monarch stinks. If only there was an egotistical, evil butt they could trick into taking the throne… / Thanks to an awesome Bummy Rippa movie, Zack becomes obsessed with history and the famed Porcelain Throne of King Tush-ankhamun. Using the diary of Smellbourne Sterne, Eleanor's great grandfather, Zack, Deuce, and Eleanor set out to find it and prove their awesomeness to Silas.
Zack becomes obsessed with a new video game where you play as the butt. It‟s strangely kinda awesome. Zack aces the game to the point that he can totally think like a butt. When Zack reaches the end of the game he discovers the villain is Silas Sterne! Soon, the whole town, obsessed with the game, chases Silas out of Mabeltown. And now the Great White Butt has the town to himself and he‟s about to enact his dastardly plan – to use every toilet in town! / Zack and Deuce build themselves a butt buggy. At first they just wanna have fun, but when they find out the bad butts are racing in the Mabeltown Rally, they want in on it too. Why? Because this year, after winning a gagillion years in a row, Silas Sterne and his whole family line have been banned. So Silas, Eleanor, and their fish (go figure) help train Zack to race the race of his life. Hopefully.
Zack accidentally removes Deuce's stink – the essence of what it means to be a butt. But then he notices Deuce and Eleanor getting a long better. Somehow the lack of stink is spreading harmony. So Zack crops dusts the town with his new stink-removing invention. Now the butts are stink-less. And that‟s when the trouble begins. The stink of the butt was keeping all sorts of weird creatures at bay, and unleashing them sets off a butterfly effect of cataclysmic proportions. Zack has gotta make the butts stink again. / Zack, Eleanor, Silas, and the B-Team all compete on a Fear Factor-like reality show in the sky. But it's a trap set by the Great White Butt. Only no one believes Zack and assumes he's just gaming them. So Zack has to save the world all by himself. What else is new?
Instead of getting to hang with Eleanor at Flushing Gardens, the new water park, Zack is stuck running errands with Gran. It‟s super boring. But meanwhile, he never notices that Gran is being followed by the bad butts. Along the way, Gran kicks some serious butt, and we – the audience – finally learn her secret, that Gran was one of the all time great butt fighters! / Zack and Deuce re-attach in order to win a “Who Can Sit the Longest Contest” at Cheekburger. But they sit so long that when it‟s over, Deuce is still asleep. Zack can‟t wake him no matter what he does! Then, he learns from a pop up book that the only way to rouse a sleeping butt is with a kiss from a princess. And as it happens, Silas has just been named the King of Onion Rings by the Cheekburger which means – Eleanor is now a princess. Ugh.
Zack tries to scare Deuce with an urban legend about the Plumber's Butt; a plumber from the sewers who makes bad butts come work for him in the depths of the underworld. But when the real deal shows up, Deuce unwittingly flushes enough times, constituting a contract. The good news is – Deuce looooooves it down there. But Zack and Eleanor, assuming he‟s miserable, set off to find him. / Zack and Deuce accidentally get on the wrong bus and instead of going to butt fighter camp, they go to cheerleader camp.
The Great White Butt is down in the dumps; abandoned by his loyal followers and unable to win a single fight, Gran takes pity on him and invites him into her house – to room with Zack and Deuce. And it sucks. Big time. So much so that Zack has no choice but to help the Great White Butt get his mojo back so he can get him out of his house and give the now-bored butt fighters something to do. / Thanks to a super static electricity charge, Deuce sucks all of the power out of Mabeltown and into his body. It's a city wide black out. Zack and Deuce have all sort of fun, powering things up using Deuce's touch. But soon they learn that the Great White Butt has created a giant laser thingamajig and has evil, evil plans to take over the town. And the battery he needs to power it is the exact size of the glowing Deuce.
Zack and Deuce go on a TV talk show where they learn that they were switched at birth with none other than spoiled rich kid, Jonas and his butt, Jack. Ugh. But Zack wants to get to know his “real” butt and so the guys swap places, each hanging with their new bestie. But Zack's new butt, Jack, starts to get weirder and weirder, Single White Butt-style. Soon, Zack learns it's all just a con and the butt belongs to neither of them. /The one and only Bummy Rippa is coming to Mabeltown to shoot a movie! Of course, it figures that the movie is about, ugh, the Dark Nugget, Jonas's faux super hero persona. It's basically the best/worst day ever. Zack and Eleanor compete to be an extra, but wouldn't ya know it, Jonas's Dad simply buys him the role. The kids sneak on to the set, only to have it attacked by the Great White Butt who's displeased at the way he's written in the script. But Bummy doesn't realize it's an attack and so the kids have to save the day!
One day Deuce goes psycho and when the dust clears, Zack's undies are on the outside of his clothes instead of the inside. Soon their creation “overpants” is a massive hit and everyone wants to wear it. Zack even becomes the face of their new fashion creation. But when a heat wave strikes and shrinks all of the underwear, suddenly everyone in town has an atomic wedgie! And worse still, their butts are trapped in a cotton blend prison. Now the guys have to get everyone to ditch their haute couture to save the butts and the town. / Zack and Deuce are messing around in Silas‟ secret lab when Zack accidentally tries on a prototype robo-butt. And it's awesome! (Although Deuce is kinda jealous.) Zack is loving his cool new synthetic butt, so much so that he goes all out with the upgrades and soon his butt gains sentience, becoming all Mom-like to the point that she's running the show! She bans Zack from butt fighting and holds him hostage! Now it‟s up to Eleanor and Deuce, the old butt, to save Zack from his new shiny, metal cheeks.
Deuce bumps his head one too many times and winds up with amnesia. Not only does he not know who he is, but he doesn't even know he's a butt! Eleanor decides this is the perfect opportunity to create Deuce 2.0, but Zack just wants his bud back. They scramble back and forth, each trying to remake Deuce. But neither of them notices they've left Deuce sitting in front of the TV watching a Bummy Rippa movie and suddenly – Deuce now thinks he's a butt fighter! And he's pretty awesome at it too! In fact, soon, Silas invites him to join the B-Team. Now, Zack and Eleanor need to switch Deuce back before he steals their rightful place in the greatest buttfighting squad of all! Thanks to one of Deuce's psycho episodes, Zack winds up with a face that looks like a butt! And lo and behold, he (and Deuce) get invited into a top secret, butts-only club, the famed Skull and Bums. It's the stuff of legends. Eleanor and the butt fighters have wondered about the rumours for years and now – Zack is in! And he gets to see what butts act like when no one is around (it's not pretty). Soon, Zack's swelling goes down and he and Deuce must find ways to re-create his 'butt face' and get back in. And when he does, he needs to find out just what the butts are up to. Eleanor says there's an evil plan. So there must be.
Zack, Eleanor, and Deuce find a bottle floating in the Sea of Butts. A bottle that implores them to never, ever, ever, open it. So of course they do. Inside is a flatulence genie; a 1,000 year old fart. He can grant them each a wish. But, before they can make a wish, Deuce inhales the genie. (Can you blame him for wanting to smell it?) Now the genie lives inside Deuce and it's Deuce that can grant wishes! Everything‟s going great until Jonas wishes he could be best friends with Zack and Eleanor forever and ever. And so now they‟re all tethered together. Ugh. / Deuce blows on a trumpet, a forbidden instrument and rips the world a new one. Soon, Butt Monkeys come out of the Brown Forest. At first it's crazy awesome (I mean, butt monkeys). But soon, they take over the town and set up a butt monkey police state, keeping paw and order and the guys are gonna have to undo it.
Can Zack and Deuce survive the the most dangerous butt of them all; the Great White Butt's mother? / Zack bites off more than he can chew when he tells Deuce to get cultured.
Can Zack and Deuce find the legendary Ned Smelly in time to save Mabeltown? / Eleanor's new neighbour has a secret - and Zack and Deuce are going to uncover it at all costs!
Can Zack and Deuce save the citizens of Mabeltown from the dreaded Zombie Butts from Uranus? / When Deuce spends the day with Silas Sterne, Zack gets far more than he bargains for.