Alright here it is. The story about Korons change.

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Make a wish come true

„Hnngh stupid cave. Hey Don´t think I didn´t see you.“
Koron shots an energy beam into a dark corner, where a Zubat was lingering. The Bat Pokémon got hit and immediatly vanished. The black buizel was inside a mystery dungeon nearby guild village. It just showed up a few days ago, and the rumour spreads that Jirachi sleeps in this dungeon. Koron was also able to feel the present of a fellow legendary, but the dungeon messed up the signal, so it could be any legendary. He went in alone. Without telling anyone. If really Jirachi is inside this dungeon, Koron could make a wish. A wish that deeply dwelled in his heart. He continued his trail through the dark cave:“ I can feel that this signal comes closer. But there is something else. Hmm what is that? It feels so close.“ *boom* and in this moment. Something big crash landed on the ground right in front of the God of destiny:“ Who dares it to enter the resting place of Jirachi!? You will not disturbs the masters sleep!“
The room lights up and reveals Korons next opponent in this fairly easy dungeon. A menacing Mega-Mawile. Koron draws out the claws of his front paws:“ You won´t stop me. I have a wish to make. And nobody. I repeat. NOBODY will stop me!“
The Mawile turned around and showed its two large horns, which transformed into powerfull maws, which can bite through anything:“ I will stop you.“
Enough chit chat. Koron took of towards the awaiting steel and fairy Pokémon. Koron swipes his claws and hits the mawlike horns, but no damage happened, he bounced back from them:“ Shoot. These things are harder than I thought. Before he could think about another strategy, the mega Pokémon made a jump backwards, and the horns tried to bite into the black Buizel. Just one bite and Koron would be done for, or lose a limp. He tried his best to dodge all the oncoming bites. At one giving moment, he shots a flamethrower into one of the maws, sadly with no effect. Alright, when normal tactics don´t work. It was about time to use his godly powers. First out of danger zone. He flies up and hovers near the ceiling. And now phase two. He fires his powerfull energy beams down, but the Mawile was very fast and dodged the oncoming beams of pure white energy:“ That is all you got? Have a load of this!“
The maws of Mawile opened up and a rapid sucession of Hyperbeams shots out of them. Koron flies around to dodge the orange shining beams, but the Mega-Mawile got another trick up its sleeve. While Koron was busy dodging the hyperbeams, it formed two shadow balls in its hands. Inbetween the shots, it throws them at Koron and because the Buizel was focused on the hyperbeams, he didn´t see the shadow balls coming and they hit him, with an explosion. And for good measure, some more hyper beams passed through the resulting dust cloud. Silence came over the room. Only Mawiles heavy breathing was heard. These actions exhausted the Mega-Pokémon but it was sure that Koron didn´t survived this. So it looked at the dark dust cloud in the air, but as the cloud settled down. A black silhoute became visible inside of it. The Mega-Pokémon startled:“ No, this can´t be.“
The cloud vanished and the black Buizel became visible again. His arms crossed before his chest and a smile on his face. His body was complettly unscaved, not even his fur showed any kind damage:“ Did you thought yout toy balls can harm me? You have been a good opponent, but now it is time to end this. Say Goodbey!“
He shed out the claws of his front paws and foot paws, to perform his final attack. He spins himself around with high speed and became a black whirling tornado of devastation, that now raced towards the exhausted Mawile. It tried to defense itself with the two steeled horns, But the Koron tornado cuts them clear of and they fall on the ground. Now the Mawile was defensless and Koron aproached the main body, he sliced through it multiple times until the helpless Pokémon falls down to the ground. The black Buizel finally ends the tornado and lands on the ground. And he took a look at his victim. It was still alive. Heavy breathing, harsh wounded and without its horns, Koron turned it on its back, to give it a last gift:“ You should have known that these who stands in my path are destined to die. You are no exception. So I will end you suffering now.“
Koron made a breather and formed a dark servia in his opened paw. He laid the dark ball of destruction on Mawiles chest and leaves. At the exit of the room. He raised his paw into the air and closed it to a fist. The dark servia explodes and destroyed the Mawile, so that nothing from it was left. Without turning around, Koron left.

There it was. The end of the dungeon. Shining crystals, decorated the sone walls and a light shines from above, but Koron wasn´t here for the shinies. He was here for the one, that was hoverring in the center of the room. And he gave little snorring noises from himself:“ Of course he sleeps. Why is Jirachi such a sleepy head? Hey! Wake up!“
Jirachi answered with mumbling noises:“ Hmm Oh a visitor, haa I have to turn *yawn* around.“
A rock got torn out of the wall and thrown towards Koron. The Buizel shed out his claws and sliced the projectile into small pebbles:“ Of course I have to wake him up. Well a little poke will sure be enough.“
Koron retreated his claws and runs up to Jirachi. He reached out his arm and ramed it into the sleeping Pokémon chest. Jirachi got send flying and Koron flew after it, before Jirachi impacted into the wall. It got catched from the black Buizel, just to get thrown up into the air. And again. Koron passed the flying Jirachi, but not to catch him, but to ram his elbow into him, and with that he got send back to the ground, and this time. Jirachi made an impact landing, face forward into the stone ground. Koron landed next to the point of impact:“ So, are you awake now?“
A moan came from Jirachi:“ Huh? W-what happened and why am I all dirty? And... Koron? Is that you?“
The dark Buizel rolled his eyes over Jirachis confusion:“ Yeah it´s me. Good thing that you recognize me. And sorry for the dirt. I had to wake you up. And you only know the rough way.“
Jirachi clapped some dirt from himself before he hovered up and laughed:“ Yes that´s true, but what do you want from me? Is there some kind of emergency? Are you inviting all legendaries for a meeting?“
Koron looked away from the smiling wishmaker:“ No, nothing in that way. It uh Urgh Why do I feel so selfish right now? No I can´t say it.“
Jirachi laid his star shaped head to the side:“ Or are you here for a wish? Naww come on tell me. I promise, no one is listening.“
Koron finally let his guarding iron wall down, and he almost teared up:“ Yes it is a wish, but that was such a selfish thinking of me. I better go now and let you sleep again.“
He made a step towards the exit, as a boulder flew pass his side, and right into the exit:“ Oh no you don´t leave. You stay here until I heard your wish. Be honest to yourself Koron. You are such a selfless Pokémon. Every Pokémon stands above your own wishes and desires. If anybody, you deserve it the most that I grand you a wish. Now stop thinking about the others and think about yourself. Now take this!“
Jirachi took one of his green papers on his head of and throws it towards the Buizel. Koron catched it with his two front paws:“ And now wish. Wish whatever lingers deep in your heart. Spit it out!“
Koron looked at the serious Jirachi:“ I uhm I I I... I want... I.. Grr I WANT TO BE UNIQUE! Since I was born, I always was this Buizel with a different fur color. Take away my color and I am nothing more than a plain normal Buizel. But I am more than that. I am the God of destiny. I deserve it to stand out from the mass, even with my body. I want a body, that lifts me up from other Buizels. I wish for a body that the God of destiny deserves!“
Koron fell down on his paws, heavy breathing about this outburst of truth. The green paper fell on the ground, right under his face. And a tear dropped on the paper. The paper then flew up and attached back to Jirachis head:“ Now that is something I can work with. Let us begin.“
Jirachi closed his eyes, focused his powers and the large eye on his belly opened. A beam of light shots out of the eye and surrounded the black Buizel. Korons body began to hurt, as a drastic change went through his body. It was almost unbearable, he moaned and panted through the pain, but he screamed out, as an extreme burst of pain pins him down on the ground. He lost his concious for a short time. When he came back to his senses, was he laying on his back. He moaned out and laid his paw on his forehead:“ Ouch. Was that pain really necessary? I feel so weird. Huh what is that?“
Koron looked at his paw through his blurred vision. There was something different on his paw, but he couldn´t really tell. He blinked a few times and his sight cleared up. There was indeed a change on his paw, as now a fully functionel thumb grew out of it:“ Wow!“
Was his only reaction. He seats up and looked at both of his paws. Yes thumbs, on both of them, but that was just the back of his new paws, he almost fell back as he saw the other side. Every finger was now paded, including the thumb, so that his front paws now has a total of pads. Jirachi flew around the astouned Buizel:“ And that is not the only change. Now get up and look at your full glory.“
Koron stood up and overlooked his body. He grew taller. His arms are a bit longer. His body is thiner and his legs are more prominent. One look at the sole of his footpaws revealed another thing. The large pad wandered up, directly underneath the toes and the toes itself, became paded, too. His tail also become longer, fitting for his new body size:“ Wow this is so awesome. I feel like a whole new Buizel. I-I need to try something.“
Koron got into position and shed out his claws. Unfortunate, he didn´t made it to get claws out of the thumbs:“Hngh come. I know that there are claws hrr.“
And with a lot of pressing, he finally got some claws out of the thumbs. Very short and very dull claws:“ Well I still have to get used to this. Oh Jirachi, thank you.“
The dark Buizel took the fellow legendary into a hug:“ Oh that. Uhm That was nothing. You did the greater part, by spouting out your wish. Now go and have fun with your new self. I will take some sleep. That wish was really tiring.“
Before Koron let go he said something to Jirachi:“ When you are awake and in the mood for some company. You can always visit me in guild village. Danjim and Gizmo, sure will love it to play with you. I life in the Sharpedo cliff. And now get me out of here.“
Jirachi thanked Koron for the kind offer and teleported him out of the cave. As soon as the Buizel felt the sun on his new formed body. He flew up into sky. Performed a loop. And shouted out a message to the world:“ Aww yeah, watch out world. A new Koron is ready to conquer you!“