Twilight woke up when she felt a tickle on her nose. She groaned and used her hoof to scratch her muzzle, only to feel something powdery on her face. Opening her eyes, she saw foal powder all over her face and hoof. A bit of confusion struck her as she sat up, but she then realized she had been pranked. Twilight became angry and looked at Smarty Pants, who was sleeping peacefully.

"Smarty Pants!", she said, "Why did you sleepy-prank me?! I thought we agreed to stop that!"

"I didn't prank you, Twily", Smarty Pants said, her face still buried in her pillow, "I would never do that". That's when she heard a raspy giggle.

"Me got you, Twily!", the voice said. Twilight sighed with frustration , knowing who had done it.

"Of course", she said, "It was you, Rainbow Dash". The voice began to laugh again. Sure enough, it was Rainbow Dash, who was dressed just like Twilight, a bottle of foal powder in her hoof. Twilight shook the foal powder off of her face and blew it off of her hoof.

"Why did you do that, Rainbow Dash?", Twilight asked, "That was mean!"

"My name Dashie!", Rainbow Dash said, "Rainbow Dash my sissy". Twilight sighed.

"Right...", she mumbled, "Just like Rarity, she thinks her nickname is her real name". At that moment, Celestia walked into the room, having finished raising the Sun.

"Good morning, my little filly", she said, kissing Twilight's cheek, "Feeling alright this morning?"

"Yes, Mommy", Twilight said, ignoring the uncomfortable cold wetness in her diaper, "But Rainbow D-, I mean 'Dashie', put powder on my face while I was sleeping".

"Nuh-uh!", Rainbow Dash said, giggling again, "YOU did. You scratch your nose and put powder on you". Celestia sighed.

"Dashie, I said no pranking", she said, "Twily doesn't like it when you do that". Rainbow Dash pouted.

"No!", she yelled at Celestia, "Me wanna prank!" Celestia stood over the regressed mare.

"If you do that one more time", she said, "Somepony's gonna get a timeout". Rainbow Dash gulped in fear. "Do you want a timeout?"

"No, Mommy!", Rainbow Dash said, "Me be good!" Celestia smiled and pet Rainbow Dash's head.

"Good Dashie", she said as Rainbow Dash suckled her hoof in boredom.

"So", Twilight said, "You chose her next?"

"Yes", Celestia said, "She was the next one I had in mind".

"Are you sure she's regressed?", Twilight curiously asked, "She seems like her normal self".

"Well, she was a bit of a debater", Celestia said, "So not only did I have to regress her mind, I had to remove any memories of her adulthood. But don't worry, I'll return them to her after tonight".

"So she doesn't know that she's an adult?", Twilight asked.

"No", Celestia said, "And she will not remember any of this". Testing Rainbow Dash, Twilight looked at her.

"Hey... Dashie", she said, "How old are you?" Rainbow Dash smiled, pulling her hoof out of her mouth.

"Me three years old!", she said. Twilight laughed under her breath. "How old Twily is?"

"I'm twenty-f...", Twilight said, before cutting herself off, "I mean, four". Rainbow Dash gave a toothy smile.

"Yea!", she said, hugging Twilight, "Twily my big sissy! Me love Twily!" Twilight literally had to push Rainbow Dash to separate them.

"I... uh... love you too... Dashie...", she forced herself to say, feeling very uncomfortable. Celestia smiled.

"Twily", she said, "Why don't you introduce Dashie to Smarty Pants? I'm sure they'd get along". Twilight smiled, crawled over to Smarty Pants, and picked her up, carrying her over to Rainbow Dash.

"Dashie, this is Smarty Pants", she said, "She's my best friend, and likes to study, just like I do". Rainbow Dash smiled.

"Me hold her...?", she asked, reaching out for Smarty Pants. Twilight, with a little bit of unease, gave Smarty Pants to Rainbow Dash. Rainbow Dash happily played with her for five seconds, then caught a glimpse of two loose threads hanging from Smarty Pants' button-eyes. Smiling evilly, Rainbow Dash purposely pulled on them with her teeth. The threads were pulled completely out of Smarty Pants, making both of her button-eyes fall on the floor. Twilight yelped as she saw the buttons fall off of her sister.

"Smarty Pants!", she said, quickly snatching her from Rainbow Dash's hooves, "Dashie! Why did you do that?!" Rainbow Dash giggled.

"I don't know...", she sarcastically said, chuckling again.

"Mommy!", Twilight whined to Celestia, who had been reading a book.

"Yes, Twilight?", she asked.

"Dashie pulled Smarty Pants' eyes out on purpose!", Twilight said. Celestia walked over to the mares and picked up Smarty Pants, seeing her button-eyes were missing.

"Dashie... did you do this?", she asked. Rainbow Dash giggled again.

"Nope!", she confidently said. Celestia sighed.

"I really don't like it when ponies lie to me, Dashie", Celestia said.

"Me no lie, Mommy...", Rainbow Dash argued. Celestia shook her head.

"You did it again", she said, "Just for being untruthful, you get a timeout. I want you to stand in the corner until I stitch Smarty Pants' eyes back on". Rainbow Dash frowned.

"No!", she said. Celestia raised her eyebrow.

"Are you being defiant?", Celestia asked, "See, when I was a little filly, and I was defiant to my mommy, I didn't get timeouts... I got this..." She opened her closet and pulled out a long meterstick, dangling it in front of Rainbow Dash. Rainbow Dash saw the meterstick and gasped. Her fear was so great that she began to soak her blue diaper.

"No mommy!", she begged, "No spankies! Please!" Celestia smiled and put the meterstick back in the closet.

"Thank you", she said, "But if you make a no-no again, I won't hesitate to use that". Rainbow Dash nodded and stood un the corner, while Celestia smiled at Twilight.

"Don't worry, sweetie", she said, kissing her cheek and picking up the buttons from the floor, "Just give me a few minutes, and I'll have Smarty Pants seeing again". Twilight smiled as Celestia sat on her bed and pulled her sewing kit. After just five minutes, Celestia had sewed the buttons back onto Smarty Pants as tight as she could so they couldn't be pulled off again. Celestia gave the stuffed pony a kiss on her cheek and gave her back to Twilight.

"There you go, Twily", she said, "All fixed". Twilight gasped and smiled, grabbed Smarty Pants.

"Smarty Pants! You're OK!", she said, hugging her tight, "Mommy! Thank you!"

"You're very welcome, Twily", Celestia said. She then looked at Rainbow Dash, who was still standing with her nose in the corner. "Dashie, I believe you owe a certain pony an apology". Rainbow Dash nodded and crawled over to Twilight.

"Me sorry Twily... and Smarty Pants...", she said.

"That's OK, Dashie...", Twilight said, "Just... please don't hurt her again..." Rainbow Dash looked at Celestia.

"Wet...", she said, pointing at her crotch. Celestia smiled.

"Alright Dashie", she said, "Let's get you changed". Celestia used her magic to pick Rainbow Dash up and lay her on the changing table. "Twilight, while I change Dashie, go wash up. Dinner is in five minutes".

Twilight nodded and after washing up, she went downstairs to the dining room, sitting in one of the chairs and sitting Smarty Pants comfortably in her lap, lightly petting her head as she waited for Celestia and Rainbow Dash.

"Twily...", Smarty Pants said, rubbing her sore button-eyes.

"Yes, Smarty Pants?", Twilight asked.

"Why did you let Rainbow Dash do that to me...?", Smarty Pants asked.

"Oh...", Twilight said, "Don't say it like that... you know I didn't know she'd pull your eyes out".

"But it hurt so bad, Twily!", Smarty Pants said, "I couldn't see! You said you'd never let anypony hurt me!" Twilight felt a bit guilty.

"Smarty Pants...", she said, "I'm sorry... you know I love you more than anything else..." Smarty Pants smiled a little.

"OK, Twily...", she said, "But please... don't let Rainbow Dash play with me again..." Twilight giggled.

"I won't", she said, kissing her cheek. At the same time, Celestia and Rainbow Dash came into the dining room and sat at the table as they all received their dinner: spaghetti with Brussel sprouts.

"Alright, everyone be on their best behavior, OK?", Celestia said, placing her napkin in her lap.

"Yes Mommy", Twilight and Rainbow Dash said. Everyone began eating. After twenty minutes, Celestia had finished her meal and Twilight had Lady-and-the-Tramp-ed the last noodle with Smarty Pants. Rainbow Dash however, had finished her spaghetti, but was picking at her sprouts.

"Eww!", she said, "Yucky!" Celestia looked at Rainbow Dash.

"Dashie, eat your vegetables", she said, "They're good for you".

"No! Yucky!", Rainbow Dash said, pushing her plate away from her. Celestia sighed.

"Dashie, if you don't finish those sprouts, you're not getting any dessert", she said. Rainbow Dash blew a raspberry at Celestia, pushing her plate further away from her. Celestia shook her head. "Alright, no cake for Dashie. Twilight, it looks like you get two slices". Twilight giggled.

"No I don't", she said, "I get one, and Smarty Pants gets one". Celestia chuckled.

"Right", she said, "My apologies, Smarty Pants".

"It's OK, Mommy", Smarty Pants said, blowing Celestia a kiss.

Two hours later, the mares were all in Celestia's bedchamber again. Celestia was attending Day Court, while Twilight and Rainbow Dash were playing inside a large playpen that Celestia had hidden in her closet. Rainbow Dash however, couldn't enjoy herself, thanks to her growling stomach. Since she didn't have any dessert, or finish her dinner, her stomach was paying for it. As her stomach growled for the thirtieth time, she moaned.

"Twily...!", she whined, "Me hungry!" Twilight looked up from Smarty Pants.

"Dashie... I don't know what you want me to do about it...", she said, "You should've finished your dinner..."

"Me not wanna eat yucky food!", Rainbow Dash complained, "Me want cookies!" Twilight sighed.

"I don't have any cookies, Dashie...", she said, "I can't help you". Rainbow Dash smiled.

"Uh-huh!", she said, "There's cookies in kitchen!"

"But we're in here", Twilight said, "What do you want me to do?" Rainbow Dash chuckled.

"Well...", she said, raising her eyebrows. Twilight caught what Rainbow Dash was getting at.

"No no no", she said, shaking her head, "I'm not sneaking cookies from the kitchen".

"Twily... come on!", Rainbow Dash tried to persuade, "Me hungry!"

"But I'm not getting in trouble for you", Twilight said. Rainbow Dash saw Smarty Pants in Twilight's hooves. Smiling evilly again, she snatched the doll from Twilight's hooves, Twilight yelping.

"Hey!", she said, "Give her back!"

"Me give you Smarty Pants if you help me get cookies...", Rainbow Dash said.

"No!", Twilight refused, "I'm not getting in trouble for you!"

"OK...", Rainbow Dash said. She then grabbed Smarty Pants by the tail with her teeth and gave it a tug, loosening the threads. Twilight gasped, knowing it was only a matter of time before she saw Smarty Pants' cotton-guts again.

"Dashie, no!", Twilight begged, "Please don't hurt her!" Rainbow Dash let go for a minute.

"Cookies...?", she asked. Twilight grunted in desperation, knowing the only way to keep her friend from suffering another injury was to go with it.

"F-fine...", she said, "Just please don't hurt Smarty Pants!"

Rainbow Dash smiled and gave Smarty Pants back to Twilight. Twilight used her magic to levitate herself and Rainbow Dash out of the playpen and down to the kitchen. Once they got there, sure enough, there was a cookie jar sitting on the counter. Rainbow Dash climbed onto the counter, sitting on it and opening the cookie jar, her mouth watering at the assorted goodies.

"Just pick a few so we can get back upstairs...", Twilight said, "I don't wanna be caught down here by Mommy..." Rainbow Dash completely ignored Twilight and began to scarf down several hooffuls of cookies. As seconds went by, Twilight began to get more and more impatient.

"Dashie... come on...", she said. Rainbow Dash continued to stuff her face. "Dashie... I think you've had enough..." Rainbow Dash continued to eat.

"Dashie!", Twilight said sternly with her teeth clenched, "That's enough! Please, let's get back upstairs!" Rainbow Dash grabbed a few more cookies, but rather than eating them, she stuffed them in her diaper and jumped down from the counter.

"OK, Twily", she said, "I'm done". Twilight raised her eyebrow in surprise.

"Did you stuff cookies in your diaper...?", she asked.

"Mm-hmm!", Rainbow Dash said, "For later!" Twilight sighed.

"Alright...", she said, "Just, don't soil yourself before you get those out". Twilight and Rainbow Dash snuck back upstairs to Celestia's bedchamber. Unfortunately, when they opened the door, Celestia was standing in the door frame, not looking too happy.

"Well well well...", she said, "Did you two enjoy your little field trip?"

"Mommy...", Twilight said, "We just went and got a glass of water. Dashie said her throat was hurting". Rainbow Dash nodded in agreement.

"Really...?", Celestia said, "Then why do I smell cookies on her breath?" She used her magic to pull the back of Rainbow Dash's diaper down. "And why are there cookies in your diaper, Dashie?"

"Uh... uh...", Rainbow Dash mumbled.

"Dashie, I believe I said you do not get any dessert", Celestia said, "Only fillies that eat all of their dinner can have dessert. You refused to finish your sprouts, and instead went behind my back and stole cookies from the jar. You were defiant, Dashie, and you know what I said would happen if you were defiant..." Rainbow Dash gulped.

"No Mommy!", she begged, "No spankies!"

"I'm sorry Dashie...", Celestia said, "But you've given me no choice..."

Celestia used her magic to carry Rainbow Dash over to her bed. Celestia sat down, and draped Rainbow Dash over her knee. She pulled the back of her diaper down, exposing her behind, and pulling the meterstick out of the closet once more. Not wasting any time, Celestia began to spank Rainbow Dash with the meterstick. Rainbow Dash cried and squirmed as the meterstick smacked her bottom several times. After spanking Rainbow Dash fifteen times, Celestia finally stopped and looked at Rainbow Dash.

"Have you learned your lesson?", she asked.

"*sniffle* Yes!", Rainbow Dash whined, "No more! Please!" Celestia smiled.

"OK", she said, "Just don't make me have to do it again". Celestia then used her magic to remove the cookies from Rainbow Dash's diaper and dump them in the trash. "I'll get you a fresh cookie in a minute, OK?" Rainbow Dash smiled.

"OK, Mommy", she said. Celestia kissed Rainbow Dash's cheek and let her go.

"Now, as for you Twily...", Celestia said. Twilight's eyes widened.

"What did I do?!", she complained.

"You helped Rainbow Dash defy me", Celestia said, "And not only that, but you lied to me when I caught you. You must receive a punishment for that".

"But Mommy!", Twilight whined, "Can't I just get a timeout...?"

"I can't be that lenient, Twily...", Celestia said, "It wouldn't be fair to Rainbow Dash".

"But... but...", Twilight continued to debate.

"Twily, it'll be better if we just get it over with now", Celestia said.

Twilight sighed and finally listened. After setting Smarty Pants down with her ears and button-eyes covered, she walked over to Celestia and draped herself over her knee. Celestia used her magic to pull the back of Twilight's diaper down, exposing her purple bottom. Just seconds later, Celestia began to spank Twilight with the meterstick. Twilight cried in pain, squirming hard as the meterstick repeatedly smacked her flank. She never thought she'd be receiving that form of punishment from Celestia. After fifteen spanks, Celestia stopped, looking at Twilight.

"Have you learned your lesson?", she asked.

"Y-yes, Mommy!", Twilight said. Celestia smiled and kissed her cheek.

"OK then", she said, putting the meterstick back in her closet, "Dashie, let's go get your cookie so I can get you and Twily in bed". Rainbow Dash nodded and followed Celestia to the kitchen.

"Mommy?", Twilight asked, her bottom still a little sore.

"Yes, Twily?", Celestia said.

"I made a messy...", Twilight said, showing Celestia her full diaper to prove it. Celestia smiled.

"Well, Dashie did too", Celestia said, "Let's get you two changed so you can lay down for the night". Two changes later, Celestia carried the two foals to the large crib, tucked them in, and dimmed the lights.

"Goodnight my little angels", she said, giving them both a kiss on their muzzles.

"Night, Mommy", Rainbow Dash said, instantly rolling over and passing out. Twilight giggled, knowing that was just what Rainbow Dash did.

"Goodnight, Mommy", Twilight said. Celestia smiled at Twilight and laid down on her carpet. Twilight rolled over and tried to go to sleep, but she heard someone speak to her.

"Twily...?", Smarty Pants asked. Twilight smiled and looked at Smarty Pants.

"Yes, Smarty Pants?", she asked.

"Th-thank you for not letting Rainbow Dash hurt me anymore...", Smarty Pants said, "Even though you got spankies for it..."

"Like I said, Smarty Pants", Twilight said, "I would never let anypony hurt you, and I wasn't going to start then. Even though I had to be hurt a little bit, I saved your life, and I want to keep you safe". Smarty Pants blushed.

"Thank you Twily", she said, kissing Twilight's cheek, "At least 'Dashie' is leaving tomorrow". Twilight giggled.

"Yeah", she said, "And you won't have to see her again". Smarty Pants smiled and yawned.

"Goodnight, Twily...", she said, "I love you..."

"I love you too, Smarty Pants", Twilight said, slowly falling asleep.

~~~~~~~~~~

Rainbow Dash woke up in the bed of her cloudhouse and gave a very long and completely audible yawn, smacking her lips a few times afterwards. After rubbing her red eyes and getting them level with each other, she spotted two letters on her nightstand, one wrapped in a blue ribbon, the other in a yellow one. She first picked up the blue letter and opened it, reading it aloud to herself.

"Dear Rainbow Dash", she uncaringly mumbled, "Thank you so much for allowing me to mentally regress you and play along with Twilight". Rainbow Dash snorted hard through her nose in anger.

"Are you serious, Celestia?!", she yelled, "I said no fifty times and you still did it anyway?! Ooh! You're lucky you're a frickin' Royal, because if you weren't I swear!" Rainbow Dash took a deep breath, calming herself down. "Calm down, Dash. Just finish the letter before you become a total hothead. That's Applejack's job". Rainbow Dash continued the letter.

"And I apologize greatly for ignoring your orders", she read, "To prove that I really am sorry, I have given you a very great reward that I'm sure you will enjoy. But be warned, you now know about Twilight's foal fetish, and you must keep it to yourself. Should you ignore my orders and tell any other soul, you will no longer have this reward. Yours, Princess Celestia". Rainbow Dash raised her eyebrow and started looking all over the paper for her reward.

"But, where's the reward?", she asked. She then peeked at the yellow letter. After putting down the blue letter, she opened the yellow one and read it.

"Dash", she read, "Come to my office as soon as you get this letter. I gotta tell you something that I'm sure you'll wanna hear. Spitfire".

Rainbow Dash jumped out of her cloudbed, threw on her Wonderbolts uniform, and flew to Cloudsdale. Once she got there, she flew to the Wonderbolts Training Center and to Spitfire's office. The door was open, and inside was Spitfire, sipping coffee and smiling at Rainbow Dash.

"Hey, Cadet Dash", she said, "How's it going?"

"You requested for me, Captain Spitfire?", Rainbow Dash asked. Spitfire chuckled.

"I really hope you aren't used to calling me that", she said, "Because you don't have to anymore". Rainbow Dash raised het eyebrow in surprise.

"Whaddya mean?", she asked.

"Well", Spitfire said, smiling in delight, "Why don't you come open this envelope on 'my' desk and find out?"

Rainbow Dash shrugged and walked over to Spitfire's desk, seeing an envelope with her name on it. She picked it up and opened it, sliding out what was in it. It was a solid gold medal, with Rainbow Dash's cutie mark on it, and under it said "Superior Captain".

"This is a Captain's medal, with my name and cutie mark on it...", Rainbow Dash said. Her eyes then began to raise in surprise. "Wait... does that mean... what I think it means?" Spitfire smiled.

"Yep", she said, "As of today, Rainbow Dash, I officially name you, Captain of the Wonderbolts!" Rainbow Dash's eyes almost popped out of her head.

"Oh Celestia!", she yelled, "You're pulling my hoof. You can't be serious!"

"Nope", Spitfire said, "This office is all yours, Dash. You're the new Captain, and I'm the Co-Captain". Rainbow Dash's eyes went even bigger.

"Wait, you mean, you listen to me now?!", she said.

"Yep", Spitfire said. Rainbow Dash smirked.

"Prove it", she said, "Go get me an oat smoothie. A good one from Guava Splash". Spitfire nodded.

"You got it, Captain Dash", she said, walking out of the room. It was at that point when Rainbow Dash knew Spitfire wasn't kidding, and what her reward was.

"So that's what you were talking about, Princess...", she mumbled to herself, "Well, I ain't gonna tell nopony else! I'll staple my lips shut if I have to!" Rainbow Dash sat in her new office chair, propping her hind hooves on the table.

"Oh yeah, and thanks".

Author's Note

You've been asking for punishment, so there you go. I hope Rainbow Dash's chapter was enjoyable for you.

Well, Rainbow Dash has gone, and that means the polls open up again! And just a reminder, after the final mane six character has gone, Spike will get a turn before background characters.

~~Rarity~~
~~Pinkie Pie~~
~~Rainbow Dash~~
Fluttershy
Applejack

Voting continues until next Saturday! Start voting!