M Mudkip x M Marshtomp x M Swampert

Story by Axel Silverwolf on SoFurry

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#36 of Pokemorph Sex Stories

Harbor, a mudkip, gets a visit from his two hot cousins who were tasked to babysit him by his too affectionate parents despite him being an adult. At first he thinks its insulting for his parents to have done that, but as the night progresses, he learns that his cousins are more fun to hang out with in more ways than one.

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In the town of Pacifidlog, a marshtomp and a swampert were eating in their cousin's house, a mudkip, one that had refused to evolve despite reaching adulthood already.

Admiral (Marshtomp) and Tsunami (Swampert), or Tsuna for short were talking to Harbor's (Mudkip) parents while having dinner at 6pm, who were two Swamperts, they hadn't seen their cousin in a while but it was a big surprise for them when his parents called them over for some reason, wondering what they were both called to get there for.

"Mr and Mrs Mudfish, it has been a while, we're surprised you called us to come over, what's the occasion though? It's been a few good years since we last saw each other" Admiral said as he ate some curry.

"Yeah, it's been so long, I'm excited to see the little guy... Or big guy... Actually, has he evolved at all?" Tsuna asked them, wondering what exactly was the status quo of his little cousin, he remembered him still being in his base form but that was over ten years ago.

"Oh it's been a long time indeed you two, but we called you two here since we're going on a small vacation of sorts" Mrs Mudfish said.

"Oh everybody needs vacations of course, so how do we come into the picture?" Tsuna asked him, not sure why they were called to come over in the first place if they were gonna leave.

"Not just any vacation, it's... You know... " Mr Mudfish said, looking at the two younger pokemorphs suggestively, winking at them.

Mrs Mudfish blushed as her own husband was absolutely blunt about it, never going into any subtlety about the situation.

"O-Oh..." Admiral blushed as he realized what the 'vacation' was for, scratching his fins embarrassingly.

"Damn, you two must have not done it for a long time huh?" Tsuna asked the two of them, who mutually got flustered at the question.

"Hey there, you caught on fast! Yes we haven't done anything, we didn't want Mudfish Junior to hear us doing anything since we have poor soundproofing here, plus the... Impacts we make are gonna cause things to fall off if we go too hard so we're going somewhere for our anniversary" Mr Mudfish said.

"Did you really have to go into that much detail over this? ^^' " Said Mrs Mudfish as he grabbed his arm lovingly, caressing his muscled bicep.

"Well you know how I could be, and I don't want to hold back one single bit~" Mr Mudfish told his wife while winking at her.

"Yes we'll take care of the little guy... Say has he evolved yet? I bet he's as big and strong as Admiral now! Guy must be built like a truck now am I right?" Said Tsuna, assuming his little cousin had grown up by now.

"Actually... He is still a mudkip" Mrs Mudfish told them.

The two looked neutrally at the parents as they realized that if that was true, Harbor was still as short as when they were little kids, he remembered a few years ago when Admiral and him had already evolved to their first evolution, Harbor had looked in awe at how cool their forms were and promised them that he would evolve as well.

"So... The guy is still a little guy huh?" Tsuna asked the two of them.

"Yes, and... He has been rather sheltered, and hasn't had a relationship for three years since reaching adulthood. We're not trying to rush him into a relationship, just make some friends but he's been too into writing for his friends on that pokecord website he always logs into" Mrs Mudfish said.

"Anyway, we're going to trust you with the house, and we want you to spend some time with our little Harbor once he wakes up in the morning. Feel free to sleep in our bedroom, just don't make too much of a mess there. Oh and feel free to make breakfast for the three of you, he's... Not exactly good at cooking" Said Mr Mudfish, handing the keys to Tsuna.

"Really? I figured he'd know how to cook and take care of himself by now" Admiral said, wondering if Harbor had even changed over the years.

"No, it's rather like he hasn't changed at all, appearance wise, he's still the same guy but has himself make a recluse in his room for a long time now and it's concerning, we figured both of you could reignite his outdoorsy nature back when he was younger, seeing you two might just do that, after all, you two were his best playmates last time we remember" Said Mrs Mudfish.

"Ah, I see, so he basically became a hermit, we'll fix that in the morning... I hope" Admiral said, although he was actually not sure if they could even pull it off considering it's been years since last time.

At this time, Harbor had arrived and was going down the stairs when he saw two very familiar pokemorphs that he had known years ago.

"Admiral! Tsuna!" Mudkip called out as he went downstairs to greet his cousins, sitting down on the table to join them.

"Why didn't you guys tell me they were going to visit?" Harbor asked them, sitting next to his mom and Admiral.

"Well you would have known if you went down earlier squirt" Said Mr Mudfish, which Harbor groaned at.

"Dad! Not in front of them! I hate it when you call me that in front of others!" Harbor yelled, quite annoyed while his dad chuckled.

"Now Harbor, don't yell, that's a bad thing to do, especially with your cousins here" Mrs Mudfish said, waving a finger.

"Ugh, can't you treat me like my age already? I may look like... Well I still look really young... But I'm old now! I'm 20 years old for Arceus' sake!" Harbor told them.

"Well squirt, you'll always be our little baby boy, and that will never change~" Said Mr Mudfish as he pinched Harbor's star shaped gills playfully, making Harbor even more annoyed.

"Ow! Okay! Stop! I get it!" Harbor said as he swatted his dad's hand away.

Harbor held his cheek gills feeling the pain from the playful gesture of his dad.

"Do you know why your cousins are here?" Mrs Mudfish asked him.

Harbor looked at her, not sure exactly what she invited them here for.

"What are they here for? They're just visiting right?" Harbor asked her.

"Not exactly, they're going to be staying with you three alone in the house for the rest of the week" Said Mrs Mudfish.

"W-What? Really? Oh boy!" Harbor said, excited about everything he was going to do, but for the wrong reasons since he wanted to write some more on about the next story he was going to make based on the requests from pokecord.

"Imagine all the activities you can do with your cousins tomorrow, you could go jogging, fishing, maybe even go to some nice hotspots in the area" Mr Mudfish chimed in.

Harbor wasn't too enthusiastic about that part but nodded nonetheless, as long as he could stay up all night and make more requests for his friends, he was happy enough to go along with his cousins' suggestions.

"I'll be glad to do all those things with them, it'd be a good time to catch up with what happened to them lately" Harbor said gladly, his parents were strict with his bedtime, even if he was an adult now, his parents never outgrew any habits of treating him like a child and he was glad to have some agency in his life for a while, even it it was just for a few days.

"It's gonna be fun Harbor, we'll be taking care of you all week, leave it to the both of us" Swampert said, putting a hand on Harbor's shoulder.

"... Mom, dad, don't tell me you called my cousins to... Of all things... Babysit me?" Harbor asked both of them.

"Of course we did, we can't risk you being lonely and alone, what if something happens to you?" Mr Mudfish said.

"I can take care of myself dad... ugh..." Harbor said as he hated being treated like this, especially in front of his cousins.

"But you're our little baby Harbor, we're not gonna let anything happen to you" Mr Mudfish said.

"Well you literally can't let anything happen to-" Harbor was about to say when he felt Mrs Mudfish put a finger on his mouth.

"Shhhhh, we know, you're helpless, we get that. Thankfully we have your cousins to help you out" Mrs Mudfish said.

Harbor grew annoyed and groaned, giving up on his parents.

"Don't worry, Harbor won't even know you're gone by the time you two get back, just go have fun and act like you two don't have a care in the world" Admiral urged them.

"Thank you, we appreciate you two for letting us have some time for ourselves, we could really use a few days off and it'll be good for Mudkip to interact with you two. Goodbye, don't be afraid to help yourselves to the food in the fridge!" Mr Mudfish said before getting up, their things were already packed in the next room as they left the house and walked away towards the edge of the floating house's platform, and dived into the sea, disappearing instantly.

"Ah... It's going to be like good ol' times when we go fishing again" Tsuna said, the two of his cousins were more the countryside kind of pokemorphs, not that they didn't have technology, in fact, they were on par with Harbor on a technical level, just that they don't spend as much time on their phones and laptops as Harbor did.

"Uh... Yeah..." Harbor said, not too excited about it, still preoccupied about something else in his mind.

The two didn't seem convinced by what he said, he obviously isn't really looking forward to it, but the two shrugged it off thinking he'd change his mind in the morning.

"Well leave the dishes to us Harbor, we'll be glad to give you a fun experience tomorrow!" Admiral said while smiling at him.

"R-Right! I'm looking forward to it" Harbor said before going back upstairs.

"Geez, his parents weren't kidding, he really is a recluse guy now" Said Tsuna, sweatdropping at how much Harbor's parents were correct about him.

"Don't worry, we have a whole weekend to be with him, tomorrow we're going to change him for the better" Said Admiral as he turned the faucet on and started washing along with Tsuna.

...

"Come on... Think Harbor think, I can think of something even better than this garbage..." Said Harbor as he tried to come up with an idea, a document on his laptop was there, with only a few paragraphs to start with it and a few pages, but Harbor seems to have writers block as he put his hands in between his head.

"Agh! Come on! I must think of something tonight! Think... Think..." Harbor said again, but it was no use as nothing worthy of any inspiration came to his mind.

"Damn it... If only I could ask dad, he'd be... Wait... That's it! My cousins! They might tell me about any sexual misadventures they've had with their boyfriends or whatever!" Harbor said before hopping off his chair and started to make his way over to the room they were staying, or to be exact, his parents' room.

Harbor was about to knock when he noticed that the door was actually slightly open.

He was about to head inside when his eyes saw what they were doing.

There was Admiral and Tsuna, with they're chubby bodies pressed against each other, with Admiral having his back against the wall, with Tsuna kissing and licking his neck.

"T-Tsuna... You know that Harbor is just next d-door right? He might hear us, even his parents said-" Admiral was about to continue reasoning with him but Tsuna silenced him by pressing their lips together.

"Shut up... It's 12... *slurps*... PM... He's probably asleep by now" Tsuna said as he held his hands against the wall and held him still as their naked bodies grinded against each other.

Harbor watched them, growing hard as he looked at them french kiss, squeezing his legs together as he felt his member twitch needily as he watched them make love with each other.

"Hah... I... *Slurps*... If you insist... Who'd be awake this late..." Admiral said as he and Tsuna tongue kissed, their slimy tongues tasting each other as they explored each other's bodies.

They erotically thrusted their cocks together, with Harbor watching them frot with so much arousal, as if they were pent up and had wanted to do this for a long time, moaning as they embraced each other, rubbing, tongue kissing,massaging, and even precumming against each other's cocks.

Tsuna then took out some sort of stone and then his body glowed, and before both Harbor and Admiral knew it, Tsuna evolved to his mega form, becoming less chubby and now more muscular and strong looking, growing bigger and sexier than he was before.

"Heh... I always loved it when you mega evolve~" Admiral said as he approached him and resumed their erotic session, their aching, twitching cocks that yearned for each other's touch gladly pulsing with need as they met each other again as if two pokemorphs meeting each other after such a long time.

Harbor gulped as he lowered his own pants and started to masterbuate at the sight of them doing something taboo yet so sexy, he couldn't help himself as he watched his sexy cousins go at it like no tomorrow.

The two cousins stopped frotting as Tsuna turned around and put his hands on the wall, shaking his ass, with both Harbor and Admiral looking at his asshole, along with his heavy balls and large cock, precumming on the floor's carpet with pent up lust as Tsuna blushed and smiled at Admiral.

"Fuck... Eat me out Admiral.. I missed having your submissive tongue on my thick ass, you know you want to... Said Swampert as he waited impatiently.

Admiral chuckled and kneeled down to meet with his large, thick asscheeks.

"Always loved how you liked your ass being eaten, why don't you try bottoming more often, it might suit you one day~" Admiral teased him.

Tsuna just groaned impatiently, he never liked the idea of bottoming for anybody in his life.

"Less talking, more licking" Tsuna said, he didn't like being teased for this fetish of his, or even mentioning the idea of being submissive in the first place.

Admiral just chuckled and leaned in, giving a long lick along the length of Tsuna's hard, throbbing cock, making Tsuna moan as Admiral teased his cock, before suckling on his balls eagerly, managing to fit one of them in his mouth, playing with it in his mouth.

"Uwoh... Dammit... Stop teasing me already and get to it...!" Tsuna said with unbridled moans and groans, his large hands clenched into fists as he resisted just sitting on Admiral's face.

"Alright big guy, just be patient, I'll get to it" Admiral said as he started to give his cock a handjob while continuing to suck the other large testicle in his mouth.

"Ngh... Fucking... Stop being a tease...!" Tsuna managed to say before moaning, thrusting into Admiral's hand as his cock got pumped and milked for all his worth.

Harbor couldn't take it, he had to... This was exactly the inspiration he needed for his fanfic, and yet he knew he couldn't leave here, not while he was this aroused... But Harbor decided that he wouldn't leave until he got his release, and took off his clothes, his twink body and large butt on display if anybody broke into the house, wanting to emulate the feeling in his mind as he jerked his cock off to Admiral's pumping action.

"Alright, I think that's about enough" Admiral said as he gave one last lick on Tsuna's cock and began to eat his ass out.

"Oooohhhh yes... It's... It's better than I realized it would be... Its been so long that I could just let you fuck my ass with your tongue all night...!" Tsuna said, loving the feeling of his ass being rimmed lovingly.

Harbor couldn't believe what he was seeing, and yet it felt so hot, he didn't know his cousins were capable of looking this enticing, he wished he was eating Tsuna out, or fucking Admiral's ass while Tsuna was being pleasured.

"Well all you had to do was say please~" Admiral teased him.

"Like... Like I would beg for it... I have my pride to keep. Just shut up and get back to work" Tsuna said, grabbing Admiral's head and jamming his face in his ass.

"M-Mph!?" Admiral yelled out by Tsuna beefy cake, before meeting a face full of muscular butt and being forced to eat him out even more.

Harbor wanted to take a closer look, and in the process, he made the door squeak as it opened further.

"...!" The two mudfish pokemorphs looked at him, staring at their cousin, masterbuating t the sight of both of them having sex.

"C-Cousin! I didn't think you'd be here!" Admiral said as he felt like he was in big trouble.

"This isn't what it looks like!" Tsuna said, thinking Harbor would be disgusted by what Harbor had seen, but that changed when they saw that Harbor was naked, along with his cock which was erect as he continued looking at them and masterbuating at the sight of them despite knowing he'd been caught.

"I... I want to join in! I wanna fuck with the two of you!" Harbor said, panting while his tongue hung out of his mouth, watching Tsuna's hole twitch with anticipation.

Tsuna considered it before seeing this as a way of making Harbor come out of his shell, he was going to agree to Harbor's request when Admiral interrupted him.

"Sure! Dive your tongue in, he tastes greater than you think!" Admiral said, blushing as he then took both of Tsuna's large asscheeks and spread them wide, giving more exposure to his enticing hole.

"Wha- Hey! I don't bottom for anybody Admiral! You know that I don't like it when-" Tsuna tried to say, before feeling someone jump up on his ass.

"...!" Tsuna looked back and saw that it was Harbor who was all too eager to eat him out.

Harbor lowered himself, hanging onto his ass like his life depended on it and pushed his face forward, diving his tongue in, making Tsuna gasp in surprise as Harbor's tongue wildly flailed inside, while thrusting their cocks beneath Tsuna, who moaned as Harbor roughly frotted with him.

"H-Harbor... Fuwah! S-Slow down! This... This is too intense...!" Tsuna shouted as the fast and rough cock rubbing combined with the aggressive ass eating was quickly overwhelming him, Harbor was assaulting his ass like he had starved for it.

Admiral chuckled as he watched them go at it roughly.

"The little guy's eager, it's nice for me not to be the only bottom here for a change~" Admiral said as he then licked his lips, seeing the two cocks rub each other.

"Just because he's... Nguwoh... Small... Doesn't mean I'll just let him... FUWAH!" Tsuna cried out as he not only felt the frotting of their cocks, but something swallow both of their cocks.

Tsuna looked down to see that Admiral then started sucking on both of their cocks at the same time, loving the combined musk they gave off, managing to fit both in his mouth, and jerking his twitching cock as the two males moaned.

"Guwah! A-Admiral! You fucking t-traitor...!" Said Tsuna as he breathed heavily, the licking on both sides was becoming too much for him.

"Mmm..." Harbor and Admiral said as they both tasted his cock and ass at the same time.

"S-Stop... If you keep going... I'll cum too soon!" Tsuna warned both of them.

Hearing that, the two then did the total opposite and sped up.

"GUWAH! STOP IT YOU TWO! YOU'RE GOING TOO FAR!" Tsuna said, gritting his teeth with a dark blush on his blue face, his eyes rolling up from the surges of pleasure.

The two didn't stop or slow themselves, determined to take down the goliath of a pokemorph Tsuna was, and it was working perfectly for their intent.

GUWAAAAAAGGGGHHHHH!!!" Screamed Tsuna as he released his cum, strings of thick, creamy white jizz escaped his cock and into Admirals's throat, who swallowed both Tsuna and Harbor's cum.

Admiral came at the same time, climaxing all over his own hand and the floor, shutting his eyes as his climax had arrived for the final time that night.

Harbor had the time of his life, he never came inside someone before but he had to admit it was the best feeling he ever had, something about bigger guys being submissive was so hot to him that he came so much into Admiral's throat as well.

Harbor fell onto the floor, feeling satisfied and smiling as he relished the feeling, he hoped he would have more kinky sex with his cousins after this.

As they recovered, Admiral got an idea and started whispering to Harbor about the idea he had, which Harbor seemed to love, nodding and totally on board with what Admiral just told him.

Tsuna panted, he hadn't came that hard, at least not from any kind of foreplay.

"Huff... Huff... Alright... Alright... I think that's enough... Now it's time for me to top one of you..." Said Tsuna, turning around to see Admiral on all fours, raising his ass high, his chubby, plump ass raised high for him to see and winking at him.

"Well that's more like it, if you want, me and Harbor could... Wait, where's Harbor?" Tsuna said, turning around to see Harbor only to get pushed on the bed.

"Guwah! Oof!" Tsuna yelled as he was pushed onto the bed, disoriented from the sudden push that he got.

Tsuna landed on his back, with Admiral backing away at the right moment as Tsuna was helplessly confused at what had just happened.

"Ngh... What..." Tsuna said as he regained his senses and saw what was going on.

His legs were raised and his legs seem to be raised up, while Harbor was on top of him in a mating press position while his cock rubbed up against his ass.

"Its time to see what this ass can do!" Harbor said as he teased Tsuna, wanting to just fuck his ass and show him who's boss.

"W-What!? No! Listen to me Harbor! I'm a top!" Tsuna yelled, he was not going to be submissive, and not because of a sheltered guy at that.

"That's not up for debate, you need to feel what it's like to be a bottom" Said Admiral, shoving his ass to Harbor's face, which the mudkip gladly planted his face in, and worshipped it.

"Admiral!? You're behind this!?" Tsuna said, outraged by this realization.

"Stop complaining... Hah... and enjoy the show~" Said Admiral as he shook his ass, loving the ass worshipping he got and started to jerk himself from the feeling of his ass being serviced.

"Wait! I did not agree to this!" Tsuna angrily yelled and struggled to get Harbor off but the mudkip was stronger than he thought he was.

"Nah-uh! Admiral told me you were being a tad bit unfair so I'm going to give you the same treatment, plus I like it when bigger guys are turned into bitches!" Harbor said, going back to licking Admiral's cake of an ass furiously as he started pushing himself inside, meeting resistance despite Tsuna's ass being lubricated previously.

"Hngh! Wait! Stop! I don't want to be that pathetic! I'm a mega Swampert! I can't be submissive to anyone much smaller than- Guwoh!" Swampert cried out as his ass was slammed hard by Harbor's cock.

Both were easily surprised as the feeling overwhelmed their senses as a pleasured face was stricken on both of them, their tongues hanging out as their pleasures skyrocketed, Harbor from fucking his first ass, and Tsuna for getting his anal virginity taken.

"Uwah! T-This feeling... My cock never felt this good until now...!" Harbor said, his body shaking with ecstasy, while drooling.

"Guwoh... M-My ass... It feels like..." Tsuna couldn't finish the sentence as his voice was shaking from the overwhelming pleasure.

"Like you have a pussy? I think that a lot~" Said Admiral, bending down to kiss Tsuna, french kissing sensually, slurping loudly and erotically with him.

Harbor wasted no time, jack hammering into his tight, untapped ass without even holding back at all.

Tsuna moaned loudly, not holding back any moans now that there was no reason to keep their moans from being heard by anyone in the house.

"Ngh... Y-Yes Harbor... Kiss my ass... You know you love it~" Admiral encouraged Harbor while making out with Tsuna, spreading his asscheeks even further for Harbor to tongue fuck.

"Mmm... It's so tasty... I can't get enough of it... It's like an all you can eat buffet...!" Harbor manage to say, his voice muffled by his mouth being preoccupied with Admiral's ass.

"Mph... Please... D-Don't stop... Fucking my ass pussy...!" Tsuna said, too lost in the pleasure to make sense of the words coming out of his mouth.

"Uwoh... I'm going to impregnate that ass of yours... *Licks* *Slurp*... Just you wait...! <3" Said Harbor, snaking his ass around Admiral's body before grabbing his cock and playing with it.

"Uwah! H-Harbor you're doing so well...!" Admiral cried out, tears of pleasure escaping his face which Tsuna licked up.

Harbor pounded Tsuna's body, he was practically pulverizing Tsuna's prostate by how hard he was slamming himself inside.

"Guwah! I'm a slut! I'm a slut for cock! Cock from smaller pokemorphs that are somehow better than me even though I'm mega evolved" Tsuna declared in the entire household as he spread his legs even further in hopes that Harbor would go deeper inside his ass.

"Ngh... that's right... I got you right where I want you... I bet you love getting used by smaller pokemorphs now!" Harbor taunted him.

"Y-Yes! I love it! My ass belongs to smaller pokemorphs! My useless cock is only fit for you to use!" Tsuna yelled, gritting his teeth tightly, saliva dribbling to the sides of his mouth from the amount of intense pleasure he was still not used to.

Admiral gladly licked it up, before going back to making out with Tsuna.

"I'm gonna cum inside you... I'll give you a baby while I'm at it!" Harbor announced.

"Me too... It's going to be intense...!" Admiral yelled.

"It's... It's gonna be a big one...!" Yelled Tsuna in pleasure, his tight, muscular ass jiggling with each thrust that Harbor made.

Harbor, Admiral, and Tsuna gave one last howl of ecstasy, one last hurrah of their copulation and climaxing all over each other.

Admiral came on Tsuna's face, with some landing in Tsuna's mouth, with Admiral's ass tightening itself onto Habor's tongue as he came.

Tsuna came all over himself, shooting his own load all over his chest and face, mixing with Admiral's cum and making a mess of his body, making his muscles glisten as well.

Harbor came, thrusting one last time inside Tsuna's ass, cumming so hard that the excess cum came blasting out of Tsuna's ass, creampieing the bigger pokemorph and making his ass drip full of cum.

Harbor pulled out his tongue from Admiral's ass and his cock from Tsuna's ass as the both of them tiredly rolled over on their backs next to both sides of Tsuna.

The two cousins sucked on Tsuna's pecs, making the pokemorph moan as their tongues and teeth bit and licked playfully on his nipples, grabbing their heads and pressing their heads harder into them all night, enjoying each other's company.

[The next day...]

As promised, the three went fishing for some quality fun time with each other to catch up on what happened with each other's lives, but ever since last night, Harbor had changed, but not in the way they expected him to when they first came over...

Harbor had Admiral frotting their cocks as the boat rocked a bit, with Admiral and him making out, their moans and thrusts distracting Tsuna as he tried to concentrate on fishing.

"Glrk... Hah... *Slurp*... You kiss so good Admiral..." Harbor said as he and his cousin made out.

"You'll have to try harder... *Lick*... To earn my respect as a bottom Harbor~" Admiral teased him, before going back to french kissing each other.

Their tongues could be seen wrapping around each other through their cheeks as the two gave sloppy wet kisses with each other.

Tsuna gulped, they hadn't been able to catch anything lately because of their frisky activities, but his mind couldn't help but wonder if he would get a turn with Harbor soon, preferably with him being dominated by him again.