Happiness Evolutions Made Easy

Story by zephyrnok on SoFurry

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A trainer finds that the egg in his pack hatched into a Riolu! But can he evolve it into a Lucario quickly? Let's find out!

Originally uploaded on August 23rd, 2010.


The egg in my backpack hatched with little noise; I didn't even realize it did until I opened up the pack and a Riolu hopped out, clinging onto my face. When he looked at me with his glossy eyes, I knew he was going to become a fearsome fighter. I lifted the small Pokémon out of my backpack, and he squirmed in my arms. I gave him a once over, he seemed to have a Jolly nature, and was in good spirits despite being left in the bag for who knows how long.

I pondered to myself on his name, searching for a fitting one. Rio popped into my mind at first, but that seemed kind of simple for such a magnificent Pokémon. In the end, I decided on Riko, a slight twist on the name I first thought of. I patted him on the head to get his attention, not that I needed to. The Pokémon had been staring at me the entire time I was thinking of a name with keen interest in my face.

"So little buddy... what do you think of the name Riko?" I asked him, not really expecting much of a response.

"Rio!" He cried, jumping and wrapping his arms around my neck to give me a hug.

"G-glad you like it..." I muttered, patting him on the back. He hung from my neck for a bit longer, and then released his grip and slid down my chest. He straddled one of my legs and looked up at me once more with a small smile, before lying down on my lap for a nap. I was content to let him rest there, after all if it made him happy, he'd evolve quickly, wouldn't he?

Absentmindedly I stroked the Riolu's head as I contemplated what I should do. I heard using a soothe bell would raise his happiness, but I don't have one of those on me. My hand scratched underneath the Riolu's chin, and he giggled a bit. Still, my thoughts meandered from idea to idea, each one seeming more ill-suited for Pokémon training than the last. Likewise, my hand had gone from an innocent scratching on the Riolu's belly, to a somewhat dastardly rub on his groin, a rub that the Riolu reciprocated and pressed back against.

His movements snapped me out of my depressing spiral of thoughts, as well as the small "Ri... ri..." he moaned while rubbing against my fingers. Amidst his fur I felt a small wet prod of flesh, an immature member poking out of a concealed slit between his legs. I wanted to remove my hand in disgust, but I was hypnotized by Riko's groans as I masturbated him.

Could sex be the answer to my problems? A happiness based evolution from a nice fucking... could it happen? My cock didn't care whether or not the evolution was possible; it was harder than a Steelix at this point, aching for some Riolu flesh. I looked around the Route, there wasn't anyone for fifteen paces, and it would probably stay that way. Trainers around these parts didn't take to kindly to those who moved from place to place, challenging Gym Leaders and the like.

I scooted farther back into the shade of trees, carrying the Riolu close to my chest in case someone did actually come along and spy his tiny member. Hiding behind the suspiciously linear row of trees, I popped my fly, exposing my erect member to open air. Riko looked at it curiously for a moment, sitting above it with my laid back posture. He scooted his ass forward on my stomach, wrapping his small paws around the large cock and gave it a pump.

It felt better than I would care to admit, small fuzzy paws pressing against the flesh of my cock; his pads gently rubbing their soft surface just underneath the head of my penis. One of his tiny paws slid down the shaft, wrapping underneath my sack and squeezed lightly, listening to my near silent yelp that only his ears could hear.

Riko giggled once more, pressing his small member against my own, as if comparing their sizes. "Ri... riolu..." he muttered as if sad that his own couldn't compare to mine. Once again he wrapped his furry paws around my shaft, this time pulling it towards his mouth. His tongue barely brushed the tip, but I still gasped in pleasure, pulling at the grassy ground. His mouth sunk a tad lower, this time engulfing half the tip. It took all my willpower not to push the Riolu's mouth further down on my cock, my hand just lightly resting on the back of his head.

The Riolu got the hint, and he slid down even farther, this time past the head, and nearly halfway down the shaft. His cute butt wiggled against my chest as he attempted to stick more of my member into his mouth, until he was nearly upside-down. Riko's tail batted my face lightly, as if trying to tell me to dig in. And how could I resist such a tight looking ass, I never considered myself gay, but with a plump derriere in the air there I began to have some doubts.

"Rio!" he muttered indignantly around my cock, the vibrations sending naughty tingles up my spine. I lifted my hand to his ass, sliding my thumb underneath his tail and pressing it upwards. This wasn't just all about my pleasure, I suppose. After all, I did want Riko to evolve into a Lucario, right? I pushed aside my conflicting thoughts and leaned forward, giving the Riolu a long lick between the cheeks. His enthusiastic "Ri!" enticed me to continue, and I worked my tongue around the tight hole hidden beneath his tail.

Riko was also hard at work; he had nearly taken my entire cock in his mouth, the parts he couldn't reach massaged by hand and licked at to moisten. His little tongue made me shiver as it wisped across a bundle of nerves between my cock-head and shaft; Riko focused there for a second longer, giving it a small nibble before sliding his tongue down a vein. With each swipe of his tongue I felt my orgasm edge closer, and I groaned, almost forgetting that I was slickening his tight hole with my tongue.

Almost instinctively, Riko pulled away from my cock right before my orgasm, allowing the pleasure to subside for a moment before he began to paw at it again; his small hands rubbing all around it. His tongue licked up the slight dribbles of pre it oozed, and with one last sigh, he pulled his rump away from me, content with the slickness.

I was awash with a sense of déjà vu when I looked into Riko's eyes once again, this time the innocence had been replaced by something much naughtier. And Riolu can't even learn Nasty Plot! His wet nose slid past my cheek as he angled his head, kissing me fully. A small, almost canine-like tongue, not that I knew how that felt, entered my mouth, dancing with my own for a brief second.

The swift movements of his tongue distracted me from my own throbbing erection for a moment, before I felt his rear begin to sink down onto my cock, engulfing it in his warm ass. Just for a brief second, I reached Nirvana, and it was in Riko's tight rump.

"R-rio..." He muttered, shuffling almost uncomfortably above my girth. He couldn't ignore the pressure that I placed inside him, and tears began to well up in his eyes. I felt a twinge of guilt and wiped a tear away with my thumb, kissing him on the nose. "...lu..." He whispered, and sank a bit lower on my cock, biting his lip. Despite the liberal amount of saliva between the two of us, and even the oozes of pre that my cock drooled, it was slow going. The Riolu was much smaller than me and his body wasn't ready for something my sized.

The small Pokémon squirmed under me, still trying to press himself onto my cock almost futilely. With a scowl, he pushed down harder, this time sinking to the hilt of my cock. I could swear I saw a slight bump in his belly, but I closed my eyes in pleasure once the Riolu began to clench around me. I grasped at his shoulders from behind, sweeping underneath his arms and holding him against my cock. I twitched inside his ass, leaking more pre than before. My change of angle must have bumped into the Pokémon's prostate, sending an impromptu burst of cum out his small pecker, spraying a dollop of cum onto my shirt.

I twitched my cock once more inside the Riolu, causing more of his seed to drizzle out. With one last pop, I sent him over the edge, his orgasm spraying a large amount of seed onto my shirt, staining it. He clenched down on my cock squeezing it as if trying to suffocate it. My orgasm quickly approached, but as I began to shift my member around inside the Pokémon, he began to glow white.

Try as I might, I couldn't slide out of the Riolu's tight ass. Riko was evolving, and my dick was stuck in him. I fell to my knees as the Riolu's body began to shift in my arms, growing larger, and harder. With a final flash of white light, I thought to myself, "Congratulations, your Riko evolved into a Lucario." Luckily, his new body was much looser, and I could better thrust into him, which I did immediately, wanting to get my rocks off in case my member was permanently mangled.

Sliding in with quick thrusts, my cock seemed to be supersensitive from the aftereffects of Riko's evolution. He seemed to enjoy his new form, as well as the attention I was giving him, and he soon pushed back to meet my thrusts with a silent skin-on-fur slap.

"C-cario..." He murmured into my ear as I fucked him, my cock pistoning in his ass. His now large paws wrapped around my back, coaxing me to cum. And cum I did, shooting what had to be every ounce of semen in my balls into the Lucario's ass, and then some across his groin. I lay against him, basking in the afterglow. My member twitched once more, and I looked down at it. The sight of my new cock shocked me. It had grown several inches, along with a few spikes underneath the head when it evolved with the Riolu. Overall it looked...

Angrier.