Story written for  CrizBN's Octransfur!
https://www.furaffinity.net/view/57979263/
Icon and Idea by my beloved  coldgemini

A Commission for  zohaku

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Ash Ketchum, now a young adult Pokemon Master, is relaxing on a beach in Alola with Pikachu while he figures out what to do now. He's been a world hero, Pokemon Champion, Pokemon Master....What next?
Luckily, someone has a solution to his problem and a myth is born!

Ash Ketchum -> Mew Transformation

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Becoming World Pokémon Champion was a huge accomplishment. Years of journeying, training, battling, adventuring, heroing, years of doing more in a week than some people did in their entire lives and finally, FINALLY! Ash fulfilled his dream. He had become a Pokémon Master.
For a while it was everything he dreamt! The thrill filling him was like nothing he had ever experienced. He had saved the world, multiple times. He had accomplished goals others could never hope to achieve. He had done all that and none of it compared to this moment, these moments following it.
Eventually, however, that thrill began fading away. Rather than being amazing and exciting opportunities Ash was getting slightly annoyed by all the companies asking him to be their spokesperson. He loved battling, but everyone everywhere was asking him to battle no matter what he was doing, each hoping to earn a sign of respect from the Pokémon Master or perhaps even dethrone him! The fun faded from most of these battles as they lacked the spark Ash loved in a good battle, especially since for the majority of them he didn’t even need to command his Pokémon as they were strong enough and skilled enough they could win a battle on their own.
Vacation? That sounded good but everywhere from the mountains of Johto to the jungles of Alola to even the far off shores of Unova there were hordes of admirers, haters, fans, and wannabe rivals making sure he could hardly take a breath without being swarmed.
Eventually, thankfully, even that began to slow but still Ash had learnt something from the experience. Becoming a Pokémon Master was his dream…
But what now?
He was still quite young. Not as young as when he started his journey but he very much had enough time to do anything. Hang up his hat and jacket and go to college for something? Maybe but what? He wasn’t as booksmart as Gary to try and become a professor. Try a new style of battling like contests? Maybe, he wasn’t bad at them but something told him if he tried it he would be World Contest Champion in far too short of a time to really enjoy the challenge of getting there. Just enjoy his fortune and fame?
Absolutely not! He had to be doing something and since the world didn’t need saving 24/7 from some strange threat, then what?
Maybe he could become a Frontier Brain after all these years? They’d love to have him still and the only trainers he would have to fight would be very, very talented indeed to face against him at that point but those competitors would be so far apart that it would probably make more sense just to stick to tournaments and championships to get the thrill of battle.
As Ash lounged on a beach chair in Alola on a quiet beach at a luxury resort where he could manage to get some time to himself his thoughts slowly came around to an old memory from his young days. It was a very happy memory, something that occasionally returned to him in a dream or thought and always made him smile. Some days that smile was a little more melancholic than other days but today it was a warm happy smile.
It had been for all too brief of a time and it had been an accident but there had been a time when Ash had been transformed by a witch named Lily he had met in Johto. It had been a temporary transformation but the memories still lingered even now. He could remember how it felt to have his bare Pikachu toes dig into the dirt, feeling the electricity running through his body. He hadn’t battled in that body, would he have enjoyed it? He enjoyed being the trainer so would he enjoy being the Pokémon in a battle?
Maybe I could find her and ask if I could try that again, Ash pondered to himself. That thought had merit, it seemed exciting, getting him eager in a way he hadn’t felt so strongly in months now. He wanted to try being a Pokémon again, for longer this time! Maybe he could convince a friend to act as his trainer? Wouldn’t that be funny! Getting ordered around like a Pokémon by one of his own friend! He laughed softly to himself as he considered which one to call because this was happening!
“Pika pi?” Pikachu seemed to be able to detect Ash’s excitement, looking over from his own smaller hammock under a small umbrella shading the electric mouse from the Alolan sun overhead. Ash didn’t reply to Pikachu yet; this was going to be a surprise for his best friend too! Everyone would be so surprised when the World Pokémon Champion became a Pokémon himself! The first change had happened so fast but he could already imagine so clearly how it would feel this time that he could almost imagine feeling it happening to himself already!
Where he seemed to imagine it starting was a surprise though. He would have expected to start his changes in his hands or feet, maybe even his head but instead his imagination seemed to be making him feel like his blue floral-patterned swim trunks were stretching from the back as they struggled to contain the imagined tail growing from the base of Ash’s back. Strange place for a transformation to start, Ash thought but he let his mind continue the thought experiment it was going through. He was so enraptured by the idea of becoming a Pokémon that just a little daydream, though a more vivid one than he usually had, was enough to enthrall him for hours.
Not that it would last hours, but if it did he’d enjoy every second of it.
Aside from how uncomfortable his swim trunks were getting! Stretching and pulling, struggling to contain his growing lightning bolt of a tail which was now being squished between himself and the chair. Dang, why does my imagination have to be so mean to me sometimes? Ash grumbled to himself, leaning forwards and pulling at his swim shorts just enough to let his fake tail free so it would stop feeling so uncomfortable.
Clunk!
“What?”
“Pi?!”
Ash felt it, but he didn’t believe it. Ash heard it, but he didn’t believe it. He turned his head, feeling a dull throbbing, and while he very much saw it with his own eyes and he knew Pikachu did too he still couldn’t believe it.
There was a tail. He saw it. Pikachu saw it. He could feel a bit of pain where it had sprung out of his shorts and whacked against the wooden frame of the chair. All signs pointed to the tail existing and still Ash was having difficulty believing it was real. He thought about moving his tail. It moved. He thought about tilting the end just a bit. The end of the tail tilted just a bit.
Yep. It was his tail all right. But it was not a Pikachu tail.
Ash had seen this tail many years ago and he had absolutely no doubt about it. The thick club shape at the end, the long and flexible length of it, and the soft pink fur covering it could only mean one Pokémon; Mew. Ash was being transformed into a Mew!
“How is this happening?” Ash asked, blinking, looking at the tail, moving it. It was his, no doubt, but…how was it his? How had he grown it?
While a fair question there were other, more pressing questions he should have been thinking about such as: what part of me is going to transform next?
Pink fur spread up his back, wrapping around his waist and belly like fluffy arms coming in for a hug, ‘fingers’ of fur spreading across his belly and spreading beyond. His dream was becoming a reality, though he was becoming a Mew instead of a Pikachu…and….Yeah, as the changes continued Ash realized he wasn’t worried or stressed. This was what he wanted! And a Mew felt right to him. It wasn’t his first thought but now that he realized he was becoming one he couldn’t wait for the changes to continue! He needed them to continue! He needed to become a Mew!
As if his own mind was encouraging it the changes seemed to speed up, starting to affect not just his exterior but the inside of his body too. He had never been a particularly tall person but even now he could see he was shrinking. The beach umbrellas looking higher up and Pikachu, who was still sitting on his own recliner sipping his drink as he watched the changes continue, looked a lot closer in size now than he had a few minutes ago!
“Pika pika,” Pikachu said, adjusting himself to better watch. For a moment Ash was confused, shouldn’t Pikachu be distressed by this?
Then a flash of clarity struck Ash. He wasn’t worried, so why would Pikachu be worried? They’d been through a lot together so this was just one more strange thing after a lifetime of them, nothing to be worried about at all.
Slowly though, Pikachu started getting farther away.
As did the ground.
That shocked Ash and he yelped as he realized he wasn’t touching anything! He was floating in midair, slowly rotating as he thrashed and squirmed, trying to grab something so he didn’t just keep floating up and up into space! Though he was no longer ascending, just hovering in midair out of reach of anything.
“Pikachuuuu!” Ash called out but the electric mouse just waved a cute little paw dismissively, already figuring out why Ash was floating. Now he just had to wait for his trainer to realize why too. Ash’s swim trunks were feeling weird again as the human’s hips grew compared to the rest of him, giving him strong thighs like an animal, good for running and leaping, and also good for keeping swim trunks on and preserving his modesty! His body had shrunken so much they were starting to fall off. He reached down and clutched them as he slowly rotated, tail over head, accidentally wapping himself in the face with the tip of his pink-furred tail.
Woah, my fur…Ash took hold of the tail; he hadn’t really touched his fur but now that he had he didn’t want to stop! His fur was so soft, so luxurious! The most expensive sheets in the world couldn’t compare to this! It was incredible.
As he turned he could see his feet above him, soles facing to the heavens above, and already they too were changing. Fur covering them, toes merging and fusing down to three toes per foot while they stretched out longer and longer, thinner, but so fitting for a Mew. He wiggled his toes, frowning and recoiling as some sand fell on his face which made an unseen figure nearby giggle.
“Hmm?” Ash perked up, twisting himself and finding himself upright, no longer rotating as he looked around. He had heard a giggle after all but from where? There was nothing nearby.
His ears perked up, starting to grow atop his head where his hair was already being converted into pink fur. He didn’t hear something now but…he felt something. Not physically, but there was something around him he just…
Wait, was this…psychic power? Deep within him he felt it growing just as surely as the rest of his body. From the tips of his long feet to his shrinking, adorable arms to the end of his clubbed tail, he could feel it filling him. Psychic power, tonnes of it! He was a mythical Pokémon now but it was still surprising just how powerful he felt!
Perhaps more surprising was…He didn’t want to fight. He had assumed when he became a Pokémon he would want to fight, to be just like Pikachu and fighting foes and having a great time battling but no he just wanted light, harmless fun!
A pink bubble materialized beneath him and he bounced off it, giggling to himself, using just enough psychic powers to make sure he landed on the bubble again before bouncing off it! Oh this was fun!
And now as the psychic powers grew within him he could finally completely sense it; there was a third being here on the beach. As if it realized Ash had caught it the figure suddenly dropped its invisibility revealing…
Mew. The real Mew, the one who had started this change! And, without a word of explanation the Mew flew forwards towards Ash and…
Bounced on the bubble too!
The two giggled, it was so fun! Every bounce and laugh finished more of Ash’s transformation, rounding out his feline head, pulling his nose and mouse forwards into a short, blunt muzzle, helping his eyes grow into big, adorable, blue feline eyes identical to the ones looking right back at him. It was like looking in a mirror for both of them.
“Pii, pika pi,” Pikachu said approvingly, and Ash didn’t even need to use his new powers to know what Pikachu was saying exactly because Ash felt it too.
This was right; this was what he was always meant to be! He was always meant to be a Mew! A happy and excited Mew who loved to play, for sure! But more than that…
As he and his fellow Mew bounced on the psychic bubble more understanding flowed between them. Or perhaps Ash simply realized it because this was why he had been transformed in the first place. Either way, he knew why this had happened and what he had to do now.
Mew wanted a friend, many friends! And one way to do that was to make friends! Being a Pokémon meant that process could be complicated by the fact that most humans upon seeing a Mew were more interested in catching, battling, or studying a Mew than playing with it!
However there were some people who wanted nothing more than to become a Pokémon themselves and those people would be happy to play with a Mew!
Ash grinned, revealing his new pointy feline teeth to his companion Mew who smiled right back with a delighted giggle. They were going to start a new myth across this land! Creating a new story about a Mew, two Mews in fact though the details of the myth didn’t truly need to be exact, that would come and find those who longed to be Pokémon, and if you played with the Mew then you too would find yourself changing into the Pokémon you had always been meant to be.
Fur, scales, armour, claws, tentacles, you’d grow it all!


Reality was no boundary for a myth either; even those reading this myth from the other side of their screens might feel its call, its lure. Can you feel it starting already? A little tingle perhaps as fur grows down your back, or a twinge as scales cover your hands?
It won’t be long until Mew and Ash come to reveal your true you!