Chairzardtaur/Rapidashtaur

Candice and Rachel were out on a midnight stroll through the woods on their way to a secret bonfire. They looked like twins with almost the exact same height, the same shade of dark brown hair, and those two identical pairs of beaming hazel eyes, but they were not related at all. They were walking along a small dirt path, chatting about the party when they banged into something hanging from a tree branch. They backed up slightly and started to rub their heads when they noticed what they had run into, tow silver chain necklaces gleaming in the light of the full moon. They picked the necklaces up and studied them more closely. They discovered that each one had a pendant attached to it. The one Candice ran into was a Charizard; while the one Rachel had bumped into was a Rapidash. They were amazed to encounter their favorite Pokemons from when they were little. They shrugged at each other and put the necklaces over their waist length hair simultaneously. The two girls continued to chat about the party when they were both taken over by a surge of pleasure and began to transform.
Candice collapsed onto the ground and moaned in pleasure as her feet grew in size and transformed into three-toed paws topped off with sharp claws, shredding her sneakers. Her legs became shorter and thicker as her knees snapped backwards. Her skin became softer as orange coloring crawled up her legs. She kicked her jeans off as the pleasure increased as a thick tail grew out of the small of her back and grew to five feet long. The new tail became colored orange on top and bright yellow on the bottom. Two more appendages grew out of her waist and grew to the same size as her original legs as her stomach exploded outward, tearing up her shirt and windbreaker beyond recognition. Her belly became yellow, while the rest of her body became orange as her breasts grew rapidly in size, eventually reaching a G cup. Her hands became three-fingered with sharp claws as her arms became skinnier. Her shoulders split apart as two large bat-like wings emerged and quickly became colored. The back side was orange, while the front was green except for orange trim at the top. Her neck elongated as the coloring climbed up it. Her face elongated into a draconic snout as her teeth became razor-sharp.  Her irises lightened to gold as the coloring nearly engulfed her head. Two small horns grow out of her forehead as her hair turned orange and grew down to the floor and beyond, trailing behind her seven feet. Her hair became locked in tight curls as red lowlights snuck their way in. The tip of her tail became engulfed in flames as her transformations ended.
Rachel held her stomach and groaned in agonizing pleasure as her feet melded into black hooves, tearing up her sandals. The new hooves turned dark brown as short white fur started to crawl up her legs, which where elongating as her knees snapped backwards, causing her jeans to fall to the ground. As the fur crawled up her waist, the pleasure intensified as flames erupted from her hooves and a flume of fire six feet long erupted from the small of her back.  Her spine elongated as two horse legs came out of the front of her hips. These new appendages grew to the size of her original legs as the fire erupted on her new hooves. Her hips burst outwards as her belly was sucked in, giving her an hourglass figure as her white hairs crawled up her waist. Her boobs exploded out of her shirt, eventually growing to a G cup. Her hands became three-fingered with cone-shaped pads on them as the fur crawled down them. Her neck grew longer and thickened as her face was stretched out into a horse muzzle. A small horn protruded out of her forehead as her ears grew pointier. As the hairs nearly covered her head, her hair turned orange and grew longer and longer, trailing behind her seven feet. Her hair became very curly as yellow highlights appeared and the transformation ended.
The two girls stood there for a while, still enveloped in the immense pleasure. Eventually the pleasure disappeared, and the two girls stood there dumbfounded. They looked at each other and started to stutter.
"Y…yu….you're" they said almost simultaneously. The two girls examined themselves and could not believe their eyes; they had transformed into Taur version of their favorite Pokemons!  They decided to abandon their old lives and start new ones together in the wild. They were running hand in hand with incredible agility when pleasure engulfed them once more. They grasped their stomachs in pleasure as their breasts doubled in size and their hair doubled in length. They proceeded to grow, eventually towering the trees that surrounded them.
The pleasure left the two girls and they surveyed their new size with a smile. They laughed and ran off into the woods to live a care-free life.