FSE

Furry search engine

formerly SoFurry search engine

Disclaimer: This story contains themes of homosexuality, and explicit descriptions of sexual acts between humans and pokémon. If any of that offends you, I suggest you not read any further.

~~~~~~

A Small Side-Effect

“So, remind again... Why are you signing up for this again? Is it because you like risking your health on experimental drugs? Or is it just that you've completely given up on life altogether?"

I didn't answer. My Charmeleon, Zyde obviously did not approve of me applying to be a test subject for this research. The entire time that we had been at the facility, he had simply been standing by with a rather annoying look on his face, occasionally adding in the snide comment.

The waiting room was nice, the entire facility was very professionally set up, this place was legit. Even if the procedure that I was going through with was technically “experimental", it didn't really worry me much, there was too much possibility to gain, and not a lot of risk.

The door clicked open, and I took a deep inhale as the doctor entered the room.

“Alright, we're just about ready. You all set, Randal?"

I set down the magazine I had been thumbing through, honestly feeling a bit more nervous than I expected to.

“Yep, r-ready."

The doctor pulled out a small syringe. “I'm going to go over this with you once more just to be sure that we're still on the same page about what to expect."

He paused for a second, awaiting my acknowledgment, after a small nod to confirm, he began the explanation.

“As we've discussed this is serum DI-770. We believe that we have isolated a particular strand of DNA from the pokémon 'Ditto', a polynucleotide that contains the genetic makeup that causes the over-malleability of the pokémon's muscles. This serum was created using that specific nucleotide as it's base, and we believe that when applied to a human subject it will cause the body to more easily conform to changes and growth."

The doctor kept explaining it, and I just smiled and nodded, the general idea as I came to understand it is that it will help me bulk up faster.

I'm not some huge “muscle-head", but I do work out, and pay attention to how I develop, and it came to my attention that the body can only grow so much at a time... This was supposed to help with that, and the fact that they were paying $1500 to anyone willing to be a test subject didn't hurt either.

“We will be injecting you with this, and then examining the results a week later, followed by another injection the following week, and then one final injection a week after that. Once you come in for the final examination three weeks from today, you will be paid the $1500."

“Sounds great to me... Um, I'm not going to be able to like... transform or anything like that, right?"

The doctor chuckled a bit, “Heh, you don't have to worry about that. This is just once very precise part of a Ditto's genetic structure. It only applies to an involuntary bodily need to adjust your muscles' shape and size to a degree that would not be immediately viable."

Once again, I just nodded. As long as I didn't have to worry about Transforming or something, I was fine with it. I held out my arm waiting to receive the injection.

“Randal, when this comes back and fucks you... Don't say I didn't warn you."

“Tch..."

With that final scoff at Zyde's comment, I felt the pinprick on my arm, and the deed had been done.

“You're all set. You have an appointment one week from today for an examination, and your second dosage. Remember to call me at any time if you feel any discomfort or possible side-effects. See you later, Ran—Oh! One last thing..."

The doctor grabbed a graph from the desk as a visual aide, “I would avoid frigid temperatures, iced drinks, anything cold could impede the effects on the substance."

“Oh, of course, no problem."

I answered quickly, more interested in getting out of there than anything else. With the task complete, and Zyde thoroughly annoyed, we made our way out of the building.

“I can't believe you actually went through with that, Randal... They just injected you with something that you can't even identify! You could wake up tomorrow with gills or something!"

I had been Zyde's trainer since I was 12, seven years ago since we had first met, and I knew the Charmeleon pretty well. He hated unnecessary risks, and he hated short-cuts, and this somewhat counted as both. I knew he was more-or-less just concerned about my health, but still he just had this way of making me feel like I had just “failed" him, like the disappointment of a parent or something.

“You've made your thoughts very clear, Zyde... But hey, whatever this stuff would do to me, I'm sure my body can handle."

An attempt to lighten the mood, I turned to him, and flexed my muscles as I spoke. As he looked over to me, I spotted a smirk beginning to form on his face, even as he attempted to hide it.

“Heh, right... Just wait until I evolve. Those muscles of yours won't be so impressive next to a Charizard's strength."

He looked to be finally getting past it. Very fortunate for me, as I was starting to worry that I'd have to deal with an anxious pokémon for the entire duration of this experiment.

“Oh, almost forgot... You got a voicemail from Veronica. I'm pretty sure she wants to go out on Friday. You should give her a call, she's got that really hot Braixen who's really good with her mo—"

It took me a second to react, but as soon as it hit me, I cut Zyde's commentary short.

“Hey! You listened to my messages again?! When did you even get my phone?!"

The Charmeleon sighed and rolled his eyes, “You gave it to me, remember...? Right before the exam, you had me hold your phone and wallet."

…

“Oh, yeah... Still, that doesn't mean that you can just listen to my private messages!"

My anger was mostly feigned, I was pretty used to the fire-type invading my privacy, and honestly, I never remembered to check my voicemail anyway.

“Tch, if it wasn't for me checking your messages, you'd never hear them. When was the last time you even checked them yourself?"

“I checked them... on... umm... the 3rd... ...of last month... I think."

I looked down at the pokémon, spying a sarcastic smile on the fire-type's face.

“Whatever! It's starting to get late! Let's just get home!"

Slightly annoyed, I stormed forward, causing Zyde to lag behind a little bit. I swear I could hear him chuckling slightly as he jogged behind trying to catch up.

“As I was saying, Veronica's got that crazy hot Braixen girl, and I could seriously use a little action, so if you call back Veronica we could both—"

“I uhh, already talked to Veronica earlier... She called around lunch time, I turned her down."

Zyde stopped in his tracks, even though I was a few feet ahead of him, I could tell, and I could feel his eyes burning into me.

“What!?! Why!?"

His surprise wasn't unfounded. We usually discussed stuff like that. I would sometimes go out with girls just so Zyde would have a shot at their pokémon, the same way that throw casual matches or keep a girl's pokémon occupied, so that I could have a shot at the girl herself.

I admit it's kind of sleazy, but we were two single guys, we did what we needed to...

“Sorry! I didn't know you were into her Braixen!"

“ARGH! Randal, I'm dying here! That little magic fox girl was all over me last time I saw her!"

Honestly, I felt bad. Largely it had to do with the fact that he spent two evenings last week with a very grabby Garbodor female just so that I could get a shot with its trainer. I owed the little fire lizard.

“Well... If you want, it is your turn..."

That was all it took to calm him down...

~~~~~~

Zyde and I had an arrangement. At times, we would help each other out, if one of us needed relief, alternating roles each time. When I reminded the fire-type that he was up, that's all he needed to hear, I was lucky he didn't pick me up and sprint us home after that.

We weren't even through the door yet when Zyde had gotten his claws onto my waistband and started lowering my pants. Frankly, I was actually pretty lucky to have made it that far, last time is was his turn, he very nearly tried to undress me right there in the middle of the pokémon gym. That situation garnered a few odd looks at the time. Zyde had always gotten pretty excited when it was his turn, and this instance did look like it was going to be any different.

We moved towards the bedroom rather quickly, mostly ushered onward by Zyde, who was obviously eager to start, which was understandable. He hadn't gotten to be on the “pitching" side since the last time it was his turn. We're not a “couple" or anything, we both prefer girls if possible, but whenever we're both pent up, the whole “friends-with-benefits" set up was something that both of us were on-board with.

By the time we reached the bed, I was essentially stumbling out of my underwear, and Zyde was already close to fully erect. At full-mast he's around 7 inches, which is roughly the same as me. Though a bit more impressive on his four foot tall body. He insists that he's about half-an-inch longer than I am, but I'll never admit to that...

I was on my hands and knees almost immediately, and Zyde was behind me. I heard a cap pop open, so I assumed he was lubing himself up. Either way, he didn't take long, it was only a moment later that I felt his tip nudging it's way into me.

“Ooh... That's fffffuuuucking great!"

Just from the sound of his voice, I could tell that we was already in pure ecstasy. He sank into me very quickly, burying himself as far in as he could, he usually takes more time, but I supposed it's no surprise with how eager he was.

“Fuck yeah... You love this huge fire dick don't you?"

I rolled my eyes, I had almost forgotten about Zyde's dirty talk...

“Yeah, you're gonna feel every last bit of my searing hot poker..."

“Nngh..."

I stifled the moan as best I could, I would never let him know, but the Charmeleon was actually pretty good, assuming you could live with the attitude change.

** BZZZZZZZZ BZZZZZZZZZ **

My phone vibrated loudly on the dresser, somewhat ruining the mood. I glanced over towards the phone, and not a second later, I felt a sharp sting on my backside.

** SMACK **

With a snap of the blunt side of his claw against my ass, he silenced me before I could even think about diverting my attention from our current activity.

“NOPE! Don't even think about it! Right now, the ONLY thing you should be thinking about is how much cum I'm about to load you up with!"

** PLAP PLAP PLAP **

His speed was increasing, we'd done this enough times for me to know that he was getting close, which would work out well, because I was about there myself.

“Hnngh..."

He didn't even make one of his little remarks as he blew his load, it was struggle for him to just stay upright through it. I felt several strong spurt of what felt like fire spread through me, and that sensation of intense heat is what pushed me over the edge.

“Ooooh... Shit that's hot..."

As Zyde reveled in the bliss of his orgasm, he held himself as far inside me as he could, keeping his hips flush against my ass a his body grew limp against me.

“Ahhh..."

We slumped onto our sides together, both of us a bit exhausted.

“Zyde... you're still inside..."

I received no response except a deep snore, the fire-type was already asleep. I usually didn't let him fall asleep while his cock was still inside me, but frankly, I was wiped out. With my own orgasm subsiding as well, I was about to pass out myself.

“Hmph, if you get hard inside me overnight... I'll be kind of annoyed..."

I spoke out loud to no one in-particular, knowing that Zyde was already unconscious as I drifted for the evening.

~~~~~~

“Ugh, it's too hot..."

I woke up, but didn't open my eyes more than a crack, just enough to see rays of light coming in through the window, and it was the first thing I noticed, it was uncomfortably hot.

Now, usually after a romp with Zyde, I can feel a noticeable shift in my temperature. I mean, he's a fire-type, so everything about him is literally hot. His skin, his insides, his fluids, he literally has a flame on the end of his tail. I'm still not sure why the bed doesn't catch fire...

This was different though... I can usually feel a warmth all around me, even through me, but this feeling was just straight out hot, and to an awkward degree even.

Still, I didn't think much of it, I could still feel Zyde against me, and I could still feel myself being stretched. Just like he mentioned, he must've slipped back inside me during the night, nothing new there...

“Might as well get up..."

I didn't even know what time it was, but the sun was up, and I was awake. There was no way that I'd be able to get back to sleep again anyway, I was almost sweating due to the heat I was experiencing.

I tried to roll towards the side of the bed away from Zyde, quickly realizing that I wasn't having much luck.

“Ugh, Zyde... get your dick out of me..."

I didn't get a response, not that I really expected one, he usually sleeps late the morning after sex. Though it was odd, usually I can pull right away. I'd roll off the bed, and he'd slip out of me. Today however, he seemed to be anchoring me in place, like he was deeper into me than he usually was, and apparently heavier as well.

The thought crossed my mind, “Maybe he evolved overnight?" That would explain the change in heat, the size change, the weight, everything... Then I noticed the sight of the arm draped over my shoulder, still that same shade of deep “Charmeleon" red, if he had evolved, it'd be closer to orange—wait a second... “Zyde is a good two feet shorter than me... how was his arm over my shoulder...?"

I glanced back and forth, a little confused at the situation, before finally glancing downward and spotting a cantaloupe-sized distention of my gut.

“AAAAAAAAAAAAAAAAAAAHHHH!!"

My cry of terror was enough to make Zyde's eye blink to life.

“Unnngh... It's too early to be screaming, Randal..."

That was my second surprise of the morning, hearing Zyde's voice coming from above my head. With me spooned against his front, the top of my head didn't even touch the chin, of the supposedly four-foot-tall creature.

“W-What the fuck is going on!?!"

“Huh? What are you ta—"

A little slow to catch on, but the Charmeleon finally noticed what was wrong with this picture.

“WHOA! Uh, Randal?"

“Zyde, Why are you huge!? What's happening?!"

Zyde shot to a upright sitting position. With me still firmly attached to his front, I didn't much choice as to go with him. His legs hanging off of the edge of the bed, and me in his lap, with my back flush against his chest, meaning that the bulge in my gut was...

“Uhhh, Randal... I don't think I'm any bigger... You're just... small, for some reason..."

Looking around at the room, he was right, he was still the same size in comparison to everything else, his legs were still even too short for him to reach the floor while sitting on the bed.

One thing immediately came to mind.

“That Ditto stuff, serum, experiment... WHATEVER! That has to be it! We have to call that doctor!"

Without thinking, I went to reach for the phone from its resting place on the dresser, quickly realizing that I couldn't actually reach it, not to mention I was still stationary in my pokémon's lap.

“Ah! R-Randal, maybe you should... hold still..."

As he said that, I could feel a light throb originate from Zyde's dick, and resonate through me. With him still inside me as he was, he was clearly getting a bit of stimulation from me moving around. Using one hand to hold me still in his lap, Zyde reached over to the dresser, grabbing the phone.

“Oh, you have a message... from the doctor... He must have been the one that called last night."

He tapped on the phone a few times, playing the message.

“Hello Randal, this is Doctor Costas from the testing facility. There's one more thing that I forgot to mention to you while you were here. I mentioned to avoid anything especially cold, but I would also recommend to refrain from drinking any hot beverages during this experiment as well. Cocoa, tea, coffee, etc... The introduction of a hot fluids into your body could cause a constrictive reaction, and make your muscles compress inward slightly. In layman's terms, you'd shrink.

I apologize, I meant to tell you this before you left, so I hope you get this message. Though it is just a temporary side-effect, so if you do have morning coffee or something before getting this message, the effect should not last more than 24 hours.

Again, I apologize for not mentioning it while you were here. See you in a week."

The message ended, and we just sat there in silence for a moment. I thought back to last evening, and I definitely had not had any hot drinks, and I obviously hadn't had the chance to drink anything this morning yet.

“Err... Maybe I should have pulled out...? Eh-heh..."

It seemed that Zyde caught on before I did, “Huh...?"

“Well, I introduced some hot fluids to your insides last night... I'm assuming that's what caused it..."

It was the only explanation that either of us had, at least the only one that made any sense.

“DAMMIT ZYDE! You just fucking HAD to cum inside me didn't you!? I can't believe you—"

He cut me off, more concerned about over matters at the moment, “Err, Randal, can you yell at me later...? We kind of should focus on more important stuff right now."

I hadn't even been thinking about it, but he was referring to the large bulge that was distending my midsection.

“Doesn't it hurt? I mean my dick looks like it's about to burst out of your stomach! Not to mention, your ass has got to be gaping wide around me right now!"

“Well... Not really..."

I hadn't thought about it, but I actually wasn't really feeling any pain, despite the fact that Zyde's dick was monumental in-regards to my current height. He's usually a decent size anyway, but at the moment, I couldn't have been more than a third of my normal size, it was like a softball bat was being jammed up into me, but oddly it didn't feel any different than usual.

I stared down at the bulge, trying to decide what exactly to do, when I felt another throb from Zyde send a tremor through my body.

“Are you seriously getting harder right now!?"

“Dude! I was at like half-mast when I woke up! You have no idea how tight you are right now!"

The experimental serum was apparently doing its job. My body was very clearly stretching itself further than it usually would be able to.

“I'm uh... gonna try to get my dick out of you, Randal."

At my size, his claws were big enough to grasp around my entire body. He gripped around my torso, and prepared to try and lift me off of his shaft. Being as careful and delicate as possible, he slowly slid me upward.

It couldn't have been more than an inch, but it felt like more to me, he managed to get just that much out of me before pausing with a moan.

“Ah!"

Another shudder quaked through me, he was very clearly getting an obscene amount of pleasure from this. His dick flexed, and what felt like a spurt of pre hit my insides.

“S-Shit... I don't think I can do this... Randal... Holy hell, you don't know how good you feel right now."

He held me still in his lap, trying to calm himself down through sheer force of will, but not having much luck. The mass of flesh embedded in my backside didn't wane in the slightest. At this rate, he would eventually climax from simply holding me in place.

“You said that it doesn't hurt, right...?"

I was almost scared to answer, it's like I knew what he had in mind as soon as he spoke.

“It... N-no, it feels fine..."

He gripped a little stronger on my sides right before he spoke.

“Ngh, l-let me... just... uh..."

He wasn't even able to get out a coherent sentence, he just started pressing me down, slipping himself further into me. He was already mostly into me, so it didn't take long for my ass to slap against his thighs, and that protrusion in my gut to stretch out even further.

“AH! Zyde!?!

“I just need a few minutes... I-It won't take long..."

He wasn't asking, it was a statement. It was like he wasn't even in control of himself. He lifted me back up, pulling me almost completely off of his dick. I was very familiar with Zyde's size, but with him currently about two times larger than me, he felt absolutely gigantic as it slid through me. His warm flesh glided through me easier than it ever had before, and I won't lie, it felt REALLY good.

“Ohhh!"

I had just let out a moan of pure pleasure without even knowing it, to the point where I was surprised to even hear it myself.

“Oh, you liked that?"

Zyde's tone changed with that last bit, and I suddenly realized the fatal mistake that I had just made.

“N-No... Zyde, just get out of me..."

“Heh, right... What was that little passioned grunt you just made?"

He was quickly slipping back into that aggressive personality of his, and once he's acting all dominant, there's nothing that can get him out of the mood. Shit, this was going to happen, wasn't it?

“Hehehe, It's because you've never felt anything this big, right?"

He lifted me again, a bit rougher this time, once again leaving just his tip inside me before sliding me back down firmly into place.

“Ah, Yeah! How is it possible for you to be this tight and still so soft! That Ditto stuff is AMAZING!"

He wasn't dancing around it anymore, he was completely into it. He repeatedly lifted me nearly completely from his erection, and the dropped me back into place roughly. Each time I landed on his lap that huge lump reappeared through my stomach.

“Ah! Oh... Fuck, Zyde..."

I couldn't believe it, but I was actually starting to enjoy it. The size of the Charmeleon cock was absolutely enormous compared to my current stature, it looked like I should have literally been torn in half by that thing, but surprisingly enough, it still wasn't hurting me at all. Quite contrarily in-fact, Zyde was nailing me in all the right spots. Spots that I didn't even know were the right spots, since he'd never been able to get that deep inside me before.

Without pausing his thrusts, he managed to maneuver further onto the bed, until he was laying flat on his back, with me still impaled on his spire, and honestly I probably wouldn't even have noticed, if it wasn't for the fact that he spun me around on his dick so that I was facing the pokémon.

Just as I expected to see, he had a huge grin on his face, the same one he always had when he slipped into his cocky attitude. I hate that grin.

“Just wanted to look at your face. I love seeing just how much you're desperate for me to keep fucking you!"

He held still for a moment as he seemed to study my expression. I probably looked pretty pathetic at that moment. I'm sure that my tongue was hanging out, eyes half-rolled into the back of my head, rock hard, probably with threads of pre leaking from my tip, all from Zyde mangling my insides beyond all recognition.

As much as I consciously hated Zyde using me like this, all my body would allow me to think about was getting him to continue.

“D-Don't stop!"

“Heheh, I only held up for like 5 seconds, and already you're begging for me to keep going? Never seen you this needy before, Randal. Maybe it should be my turn a lot more often?"

“YES! WHATEVER! JUST FUCK ME!"

Obviously another fatal error on my part, but it got the result that I needed.

Zyde moved his grip to my thighs, and held tightly, and instead of lifting and lowering my body onto his erection, instead he pushed his hips up from the bed, thrusting up into me. Being tightly held down while he forced his way up into me allow his to reach further into my depths than me had been able to previously.

“AHHHHAAAHA! TAKE IT RANDAL!"

I could feel the heat increasing, spreading through me, pre-cum was starting to slick my insides as far in as his cock was reaching, which was exceedingly deep. Which made my desires all the more unforeseen... I wanted it deeper...

“FUCK! ZYDE! GET DEEPER! FUCK ME HARDER!"

He was giving me everything he could, absolutely obliterating my core every few seconds, the bulge created by his cock reaching as far up as my chest. Even with my diminished size, and Zyde's considerable girth, I still needed him deeper. I needed him to fill me. It just wasn't enough.

“Not... Gonna last m-much longer!"

The liquid heat that was his pre, was searing throughout my entirety, already leaking out around his mass. He held me tighter, and each thrust into me was stronger. I had never imagined my body being able to withstand the amount of abuse it was taking.

“AH! G-GONNA TURN YOU INTO A LIVING CONDOM!"

I glanced down towards the distention in my gut, and could actually see the first gush of Charmeleon seed pulse from the peak of that lump. My eyes almost popped out of their sockets at feeling the sudden rush of searing fluid.

AHH! ZYDE! KEEEEEEEP GOING!"

He held in place, gritting his teeth. His orgasm hitting him hard as he unloaded into me.

Zyde's loads were generally pretty large for his size, and for the most part, I'm pretty used to them. In my current state however, I could already tell, it was going to be somewhat of a new experience. With my entrance corked by Zyde's member, not much of the thick fluid was able to escape, and due to the diminished space inside my body, two heavy ropes of boiling Charmeleon cum was all it took to get my belly looking abnormally round.

“Holy shit! Zyde! You g-gotta pull out!"

Surprisingly, the Charmeleon had his wits about him enough to realize that I was beginning to swell up with his discharge, and began to unsheathe himself from my body. Though, he wasn't yet ready to let the experience come to a close.

In one snap motion, he flipped us over, so that I was on my back, on the bed while he was on his hands and knees over me, with his dick pressed down against mine. Of course, with our current size difference, he likely couldn't even feel mine lightly throbbing against his underside.

For that moment, it was like time had frozen, just long enough for him to savor the moment, and for me to really understand what this new position indicated. With an evil smirk, his orgasm continued on.

“FFFFFFUCKKKK! WEAR IT, RANDAL!"

The next jet of jizz was just as powerful as the first ones, or at least it felt that way. The wave blasted up my torso, and crashed against my chin, splattering my entire chest with the thick substance. Zyde made sure to move around enough, so to completely mark my chest and face as he rode out his euphoria.

He stayed leaning over me, even after finishing, from what I could see through the mounds of seed obscuring my vision, he looked exceedingly proud of “his work", wide toothy grin on his face as he tried to catch his breath.

“Wooo... Randal, that was just great..."

He reached a claw forward, lightly pressing it against my still rounded belly.

“How did nothing leak out of you? It's like you're vacuum sealed or something.

“Making sure to keep the sharp claw edge clear of me, he applied a small amount of pressure. In essence squeezing me, and in-turn causing a bit of his sperm to ooze out of my backside.

“Heh heh, I think I like you at this size..."

“Fuck, Zyde... This is your fault... Can you at least not treat me like a tube of toothpaste?"

If nothing else, I finally felt full, like I was actually at capacity. Though who knows if I actually was, I had no reason to think this was the limit of what the Ditto DNA could do.

Upon my mind wandering to the subject of the experimental serum, a thought struck me.

“Oh... shit... You just put a LOT more “hot liquid" into me... Th-This isn't going to make my body shrink more, is it...?"

Zyde apparently hadn't thought about that either, after a moment of contemplating it, I saw something on his face that sent a shiver down my spine... His eyes lit up. His spent member was rather soft at that point, but possibly not for long, as I felt a small pulse shoot through it.

“Randal, I think it's going to be my turn a LOT during the next week."