Author's Note

I apologize to anyone reading. I am not good at one-shots and thought the ending was rushed. This story is too adorable, and I want to drag it out, so I decided to change it to multiple parts for each story. I think it'll be better this way as it helps me flesh out things more.

Story one: Princess Celestia's Foal - Rarity Age Regression / tribe change- part 1

Rarity was confused; where was she? What was going on? She was starting to realize that there was something wrong with her limbs as they were chubbier and thicker than before. On top of that, everything was bigger than her, and she felt like her body wasn't responding to what she wanted it to do. The mare looked over and saw Spike standing over her and looking downward with a worried look as he asked, "are you ok?"

Rarity was confused as she stared at the purple dragon standing over her and said, "I don't know?"

But what came out of her mouth was incoherent babbling, and she blinked, seeing that Spike understood nothing she said. It is evident that something was very wrong; she was standing on her legs, squeaking, and it was somewhat difficult to stand on all fours. Rarity then squealed as she felt two new appendages attached to her body. It was sudden, but the mare started to flap her wings and realized that they were indeed making little flapping noises, and she was coming off the ground!

The mare was astounded to see that she was now a few feet off the floor, and she was somewhat surprised; then, out of nowhere, Spike grabbed her and said, "Hey, easy there."

The mare squeaked; having the two purple claws wrapped around her, she flapped her wings trying to escape, but the drake held on as he took the unicorn and hugged her. "Hey, easy there, it's ok."

Rarity was still confused by everything but seeing how small and chubby her body was and realized she was a foal! And not just any foal; she was a baby alicorn!"

Upon this realization, the little filly began to wiggle and squirm out of Spike's claws, and she clumsy flapped her wings sailing right to a mirror, and there she flew right into it, and Rarity gasped in surprise at what she saw back. She was looking at her reflection, seeing that she was indeed a baby alicorn with her plump round face, pudgy belly, chubby limbs, a small lock of purple mane over her head, and stubby tail. But the significant difference between what she remembered seeing herself from baby photos was that she had two giant white-coated wings and a giant horn on her head which was much larger proportional to the rest of her body. But there was something else that was interesting, seeing that her eyes had a greenish hue in them.

Rarity then heard someone coming from behind, and she turned her head to see Spike turned with cheeks flushing red. He seemed somewhat embarrassed as he said, "let me explain."

He knelt to her level and said, "Listen, I found this book that I thought would help you get inspired for Foal Appreciation day. I didn't know what was going to happen, and after you read it, you had this green glow in your eyes, and then you shouted, "I want to be an alicorn princess! To inspire foals all over Ponyville!" after that, you poofed into a puff of smoke, and you were suddenly turned into a…well…a baby alicorn."

Rarity blinked, seeing from Spike's worried expression that he wasn't lying and that she was indeed a baby alicorn. But the question plaguing her mind was, what should she do now?

Spike's expression said it all as he whispered, "um, maybe we should put you in diapers?"

"Buck, no!" Rarity snapped back as she shook her head as she wasn't inclined to wear such infantile garments. Spike, of course, couldn't understand what the baby alicorn was saying. He trailed a claw through the spines on his head and said, "you don't want to have accidents all over your boutique, do you?"

The fashionista grumbled angrily under her breath as she looked around her boutique with her new infantile mind. Everything looked so colorful and cute; she lit her horn as the green aura filled her mind and horn. She started transforming all the outfits into baby garments, from onesies to frilly dresses, and tons of diapers exploding all over the place. It was all rather cute as she dove into the pile of clothes and picked out a cute pair of purple-colored diapers and a frilly purple dress. She then flew into the air looking over at Spike, who was now somewhat worried, as he waved his claws and shouted, "Hey, come down here!"

Rarity pondered something, maybe it was her infantile mind, but she didn't want to go down! She was so happy being a cute little filly and wanted to show off being an adorable baby alicorn to the rest of Ponyville!

She then flew off through the air and headed out through the door and towards the town!

The second Rarity flew out the door, she looked around to see tons of ponies walking about with their foals enjoying the various activities set up for them. She had no idea what she wanted to do first!? Her infantile mind was racing, wishing to do so many things! The fashionista then saw Rainbow Dash flying in the air, and she seemed to be busting clouds, and she flew right over and gave the pegasus a giant hug. Rainbow Dash was somewhat surprised seeing the little filly as she said, "woah!? easy there."

She looked downward as Rarity peered up and babbled, "hey, Rainbow!"

The pegasus got a little sheepish and said, "Hey squirt, this is cute and all, but I'm not your mom."

Rarity rolled her eyes and scoffed, seeing she knew Rainbow Dash wasn't her mom, as she pointed a hoof at her belly and shouted, "come on, Rainbow Dash, I'm Rarity!"

Rainbow Dash heard more incoherent babbling, but she heard something and looked her over; then her eyes went wide. She must've just noticed that the foal had a horn and a pair of wings as she exclaimed, "woah!? You're an alicorn foal!"

The filly nodded as Rainbow Dash gasped, "wait, don't tell me your Princess Celestia's baby!?"

Rarity groaned as she dragged a hoof over her face and, for a second, was going to try to explain what was happening. But then paused, seeing maybe she could drag this out and have some fun! She lit her horn, and a cute little smiling sun appeared on her rump as she showed off her cutie mark.

"Wow!? That has to mean you must be Celestia's foal!?" Rainbow cried in surprise and held the foal close to her chest. "Come on; I'll get you to mommy, ok?"

Rarity gave a few nods as Rainbow Dash placed the filly onto her back as the daredevil shouted, "hold on tight!"

The little pegasus filly held her friend's mane tight and squealed as Rainbow Dash flew off through the air and headed straight towards Canterlot.

Princess Celestia was sitting in her garden relaxing as most ponies were out enjoying Foal Appreciation Day, so for once in a long time, she was taking a much-needed break. The princess then saw what appeared to be a rainbow streak flying across the sky, and that was when she noticed that it was Rainbow Dash her first thought was that Twilight and her friends needed her help. But as Rainbow landed near her, and spotted the small white-coated alicorn filly on her back. Celestia was somewhat surprised with her eyes lighting up as an alicorn hadn't been born in over a thousand years as she shouted, "am I going crazy? Or Is that a baby alicorn sitting on your back!?"

"Y…yeah… it is..." Rainbow Dash stammered, looking somewhat surprised. "I thought she was yours!?"

Princess Celestia was going to say something, but the little flew off Rainbow's back and right into the princess's chest. The princess was astonished by the filly's actions, and her heart skipped a beat with the little filly nuzzling into her. She knew, of course, this mysterious little filly wasn't her foal, but something was making her unable to say "no" she turned her attention to Rainbow Dash and saw that she had to give the pegasus an explanation of some sort and said, "well, no she isn't my foal, but I'm sure we're related in some way?"

The princess of the sun then placed the filly onto her back, adding, "regardless if she's mine or not, I would love to babysit the little one while we find out who her parents are."

Rainbow nodded, seeming somewhat reluctant to leave as she flew over, gave the filly a little ruffle, and said, " Well, if you need help finding her folks, let me know, ok?"

"I will, and thank you for getting this little one to me," Princess Celestia added. The princess alicorn flew over towards her palace, seeing she now had a baby alicorn to take care of, and she also needed to find out who her parents were. Were there other alicorns out there? The idea of other alicorns being around made her heart flutter with anticipation, seeing that she always thought herself, her sister, and Princess Cadance were the last alicorns alive. Regardless, her first priority was to care for this little one; everything else could come later.

While Princess Celestia made her way through the castle, Rarity was over-excited being on top of Princess Celestia's back; she was bouncing up and down in excitement as she was happy to be treated like a royal baby alicorn for a day! Sadly there were no ponies around, so she didn't get all the attention she wanted. They eventually made it to an old nursery. The place looked rather drab with an old crib, the paint on the walls peeled off, and some old teddy bears strewn about.

Princess Celestia's had a sheepish look on her face as she admitted, "I apologize, but this is Prince Blueblood's old nursery, and he hasn't needed it for years."

Rarity rolled her eyes, seeing she was a princess alicorn; there was no way she would stay here while being an alicorn filly. Her eyes lit up as her horn started to shoot out beams of green energy. She turned the blue paint into a bright purple with sparkling diamonds on the walls; she then turned her attention to the crib and transformed it into gold with a thick fluffy mattress covered in purple baby blankets. A changing table appeared stocked with fancy purple diapers, heated wipes, and containers full of sweet-smelling foal powder. Then the center of the room turned into a cute little tea party set with a violet table made out of plastic, with fancy fluffy white teddy bears wearing suits and some in purple dresses sitting in chairs around it. Princess Celestia's eyes were wide, seeing the room transform in front of her as she whispered, "Wow, you have a lot of magical talent for a foal?"

"Yeah, I do," Rarity babbled proudly as she crossed her hooves over her chest with a proud smile Princess Celestia floated over the filly down to the changing table, and the fashionista squeaked, knowing her diaper would be changed. But Celestia cleaned her up without a word and had this cute motherly smile on her face. Rarity was even impressed with the diaper change, with her rump being powdered thoroughly and a fresh diaper strapped firmly around her waist.

"Oh, you're so polite and quiet," Celestia commented with a suspicious look; she then levitated the filly to get a closer look, and Rarity felt as if she was about to be exposed. She then sneezed, sending a blast of magic at the princess, who blinked. Nothing seemed to change except that Princess Celestia's cheeks started to flush pink, and she seemed to become rather squeamish as she said, "I think somepony is hungry?"

Rarity was confused: what was the princess talking about? Then the princess levitated the little filly as she laid down on the ground and opened up her legs. Rarity's cheeks flushed red, knowing she was about to nurse the princess of the sun. After her meal, the little filly was tucked under the sheets in her new crib, and the princess kissed her on the forehead as she sang her a lullaby. Princess Celestia's voice was so soft and lovely; as Rarity listened to her sing. Eventually, the little filly became rather sleepy as the little alicorn could feel her eyelids growing heavy. She slowly drifted off to sleep as she wished under her breath that she could be Princess Celestia's daughter.