Sex Portals! For Science! Part I

Story by Rhazada on SoFurry

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WARNING: Extreme content, please view at your own discretion!

An erotic story with elements of Pokemon transformation, sex, cum inflation, and more! This is another series marginally related to my Mega Evolution Series. Enjoy! Feedback is always appreciated.


I walked into the testing room, excited for the role I was about to play. Kalos scientists, myself included, had reasoned that pokemon all belonged to the same species; their ability to interbreed and produce viable offspring within what we would call "egg groups" along with the potential for some pokemon species to breed between egg groups, cemented the conclusion that pokemon were all related. The next question pertained to whether humans and pokemon were related. Several feral pokemon species had been inoculated with a newly-developed plasmid, capable of causing said pokemon species to transform into pokemon/human hybrids, retaining their personalities as pokemon, though certain human emotions had been transferred to them depending on their type; dark types were typically mischievous, psychic types were usually calm while bearing strong emotions, and fighting types very often had pride in their brawn and physical abilities. The next steps: creating human hybrids from fertilized pokemon/hybrid eggs and producing true human/pokemon hybrids using feral pokemon. I would be the testing subject for both experiments. I had been inoculated with an infusion inducing higher fertility, heightened libido, consistent arousal, and a shortened cooldown period between orgasms. The one catch: the mating experiments would be conducted via portals.

Now these portals are marvelous intradimensional devices, allowing matter to travel in real-time from one location to another. In these experiments, the female pokemon hybrids had been outfitted with portals flush with their vaginal openings, preventing them from interacting with them and allowing easy access for me when impregnating them without bodily harm to either individual. The portal outputs generated electromagnetic fields, making them next to impossible to take off aside from remote deactivation of the field. The portals also had a fail-safe mechanism ensuring that the portals would not close unless all organic material had been removed from the openings. Conveniently, all the females had been injected with fertility solutions, promoting ovulation and sexual desire. I came over to the table in the testing room, and saw six input portals, bearing six equally attractive vulvas of different colors and textures; all human in shape and I imagined functionality, but in reality they belonged to females that were not quite human. I looked through the glass of the testing room and saw six females separated by shatter-proof glass walls. From left to right, I saw a very curvy anthropomorphic goodra, shy with large round hips and fairly small breasts, a lucario with muscular legs and arms, well-rounded hips and a lovely DD-cup bust, a short, average build weavile with breasts around a C-cup (she winked at me as I looked over at her), a beautiful, voluptuous mewtwo with wide hips and a bust around an F-cup (she looked over at me and blushed, reading my thoughts and intentions), a well-endowed blaziken with muscular thighs and solid D-cup breasts, and a defiant-looking machamp with two sets of F-cup breasts, her entire body incredible muscular. Machamp crossed both sets of her arms and glared at me, not convinced I was worth her time. I took a seat at the table admiring the lovely organic openings that needed my attention; there was even a mega stone, lucarionite, embedded in a ring which was just the right size for delivery via intercourse. I was already well-prepared to start the experiments. I picked up the nearest portal, one with a light purple hue, dripping with a light green slime.

I pushed my cock into the first portal opening, watching the females assembled before me. The goodra on the left flinched and blushed, then let out a soft moan as I pushed deeper, her tummy bulging slightly from my cock's size inside her, her slick pussy quivering around me. The other pokemon shifted as they heard goodra moan, the blaziken and machamp looking concerned for their friend, the mewtwo and lucario blushing and looking away, while the weavile looked on, licking her lips and smiling hungrily. They all knew what would be happening to them, it only mattered when. I slowly began to thrust, plunging my cock into the portal opening, the goodra moaning louder as I mated with her. Her body fluids dripped around the portal, keeping her pussy slippery as it warmed up to my thick cock inside her. I must have found her g-spot with my cock's head, because before long she began panting louder and more heavily, until she squealed in pleasure as she orgasmed, her pussy contracting gently around my cock as she climaxed. I continued to pound her pussy, her heightened sensitivity causing her pleasure to mount once again. She moaned loudly as she came again, her contractions even stronger than before, and I figured it was time to impregnate her. I focused and thrusted into her pussy with more force, even as her contractions finished, and by the time I was almost to my climax, goodra had already reached her third orgasm, crying out loudly in pleasure as my cock became harder inside her from her sexy moans, and I orgasmed, my hot cum spurting into her now very warm, soft pussy. I continued to pump my seed into her for about fifteen seconds, filling her completely and causing my seed to flow out of her pussy even as I plunged my cock deep inside her. I felt relieved, and relaxed for a minute inside her before slowly pulling out, releasing a slow stream of cum from her vaginal lips. The other pokemon were blushing and looking away in embarrassment, all except for the weavile, who was sitting down, moaning softly and playing with her nipples, her arousal high from the show she must have seen in its entirety. I knew who was up next for impregnation, and I picked up the portal with the darker-colored pussy showing, dripping with pussy juices. I brought my cock to the weavile's enticing entrance, wondering just how deep my cock could penetrate her. I pushed forward slowly.

The cute little weavile's eyes widened but then a warm desire filled her eyes; she let out a soft moan as my cock slid inside her, her tummy bulging from how large my cock was inside her fairly small frame. I began to thrust, hitting her cervix with every push, her pussy cooler than the goodra's pussy had been but almost as slick and especially tight around my cock. The curve of my cock allowed me to massage her g-spot, and she moaned louder, loving how big I was inside her, her C-cup breasts bouncing from the force of my thrusts, and she let out a loud moan as she orgasmed, her pussy contracting around my cock, still barely able to contain my size. She panted as her orgasm wound down, but another one was in store for her, and even before she finished cumming, another orgasm rocked her small body, and she cried out in ecstasy as she felt my cock deep inside her, heightening her maternal instincts, eager to feel my hot cum in her pussy, impregnating her. I wasn't too far from that, and I thrusted faster, pounding her cervix, weavile's heightened moans making the other pokemon blush, the busty lucario and well-endowed mewtwo whimpering in anticipation, wanting to feel me inside them too. I felt her pussy contract around my cock once again as she climaxed, and I decided it was time to finish up; I pushed forward, penetrating her cervix, and gasped as I came, my cock spurting my thick, hot seed into her womb, each spurt of cum causing her belly to round out from the sheer volume of cum being pumped into her. My cock was still hard after this enjoyable release, and I pulled free of her tight pussy, most of my cum secure in her womb with some spilling out of her spread lips. I pulled out of the now-very messy portal, the weavile's tummy now round and cute from our mating session. She panted heavily as she felt her arousal continue to climb, the hot cum inside her causing her to moan softly as she climaxed a couple more times in quick succession, mostly due to the fact that ice-type cum is usually much cooler than that of other pokemon types, or humans. She gazed at me longingly as she finished her last orgasm, my cum dripping from her pussy lips in the portal as her leg twitched, satisfied by our lovemaking.

I was amazed by how cute the weavile had been; I would have loved to continue with her, but I really had to focus. I picked up the lucarionite with the penis attachment that had been prepared for me, and slid the mega ring onto the head of my cock, making sure it would slip off once inside. The lucario's eyes widened as my cock slid inside her, and she let out a soft moan as my cock pushed past her g-spot and penetrated her cervix, entering her womb. As I pulled out of her womb, depositing the ring with the lucarionite inside her, her breasts began to grow, expanding from a DD-cup to a lovely F-cup as she began to mega-evolve. She moaned louder as I continued to thrust even as her hips became thicker and wider, her pussy lips wrapping around my cock even tighter as she became even more muscular. Her tail became larger and fluffier and extra steel spikes appeared on her paws. The black markings on her body became more ornate, her breasts displaying her new coloration beautifully, and her white fur gained more body and softness while her braids became larger and more distinct. I continued to massage her g-spot with my cock, her voice now slightly deeper but even sexier and more mature in tone. As long as the mega stone was within her body, she wouldn't devolve, and conveniently it also augmented her reproductive capability, in this case her fertility and egg development rate. Lucario moaned even louder as she approached her climax, massaging her huge breasts lustfully, her mega-evolution having sent her into full-blown heat and forcing her body to ovulate even more. Her moans and breastplay were enough at this point, and I reached my climax quickly, my cock flaring inside her as I orgasmed, my hot cum spurting into her warm pussy. She arched her back as she felt my hot cum flood her insides, and she let out a lustful cry of ecstasy as the sensation of being filled with my hot seed sent her over into a strong orgasm, her pussy contracting hard and long around my cock, taking as much time as three orgasms would for her to finally wind down. I was very satisfied with how easy that performance was, and I gently played with lucario's clit as I kept my cock deep inside her, making her cry out cutely with pleasure as I stroked her sensitive organ. I looked over at the other fighting-type pokemon, smiling as I took a minute to wind down myself before I moved on to the next female...

To be continued in Part II