Author's Note

So after three years (Can't believe it's been that long), I finally decided to return and write an alternate ending for this story. I feel my writing has improved a lot since I started and I was able to give this the detail that the rest of the story deserved.

Fetish warnings: Fat/Weight Gain (Obviously), forcefeeding/stuffing, hypnotism/mind-control, immobility, and a really big blob-sized Rainbow Dash. Potentially a tad bit on the dark side depending how sensitive you are.

Final Note: This is the most fetishy of all the chapters so I changed the rating from Teen to Mature just to cover myself.

The Experiment Succeeds (Alternate Ending/Bad End)

Pant “Another…” Pant “Successful workout”, Rainbow Dash declared through her heavy breathing as she slowly waddled through the recently expanded door to Twilight’s house. Although Rainbow Dash was confident in her new workout regime, the fact that the sides of her flanks were grazing against the sides of the door frame once again was proof that she wasn’t getting any thinner.

“You’ll be shedding those pounds in no time, Dash,” Twilight replied somewhat distantly. She was far too busy staring at the circus show that was Rainbow’s ass. Those two cyan blue flank cheeks were constantly bouncing and grinding against each other, each one big enough to serve as a chair. Their only competition was Rainbow Dash’s massive belly, which swayed with her steps and had begun to slightly graze the ground. Twilight shuddered with excitement as she realized that her test subject was only about ten to fifteen pounds away from immobility.

“Just a little more,” Twilight mused to herself. Although she had been kicked out of the science competition, she had resolved to continue her little experiment. In the past few weeks since she returned, she had enjoyed refining her methods and watching Rainbow continue filling out to new sizes. Even as Rainbow Dash was exercising harder than ever, Twilight was able to use her sneaky techniques to stuff her full of enough calories to negate any weight loss.

Twilight’s thoughts were interrupted by the sound of creaking as Rainbow Dash laid her massive body out on the living room couch. Twilight had recently filled the house with reinforced furniture, but even that almost wasn’t enough to handle Rainbow’s pure size.

“Hey, Twi?” Rainbow asked, still panting very heavily.

“Yeah, Dash?”

“I’m really beat. Could you get me something to drink and a small snack?”

Twilight smirked, “Sure, Dash. Just a second,” Twilight happily trotted into the kitchen where she met with Spike.

“Hey, Twilight. I’ve almost finished preparing the list of food you made. Is the plan still a go?”

“Definitely,” Twilight replied as she looked Spike’s handiwork over with satisfaction. While she had kept Rainbow Dash distracted with futile exercise, Spike had been preparing a calorie filled feast for the ages. The kitchen had been filled with cookies, cakes, pies, and several other forms of fattening desserts, “I think we’re finally ready to push Rainbow over the edge. Once she’s restricted to her bed, she’ll grow faster than anypony’s ever seen.”

“Just how big are we going to get her?” Spike asked with curiosity.

“I’m not sure yet. I’ll have to shrink her back down eventually, but not anytime soon.”

“Right, well let’s get to work.”

Twilight nodded, “Thanks for going along with this Spike. I had no idea you shared my interests.”

Spike blushed, “As long as I get to help feed and play with her.”

“Of course. Now let’s go, we have a mare who needs growing.”

Twilight and Spike made their way into the living room with a giant platter of chocolate chip cookies in tow along with a massive jug of chocolate milk. Rainbow’s eyes lit up and she began to drool, but she seemed to shake it off.

“There’s a part of her deep down that enjoys this, I just have to make it the dominant part of her,” Twilight mused.

“Uh, Twi...I said a small snack..” Rainbow said.

“No problem, Dash,” Twilight replied, “Just eat into your full. We’ll save the rest for later.”

“Well, alright,” Rainbow answered as she carefully reached out and grabbed a cookie. The moment that chocolate chip goodness hit her tongue it seemed to trigger something in her. She quickly scarfed it down and reached for a second cookie, and then a third.

“Mmm...these are really good you two. Just a few more..”

Twilight and Spike watched with approval while Rainbow Dash continued stuffing her face with cookies. There was something strangely arousing at seeing this mare eat, knowing that all the sugary calories she was consuming would cause her belly and plot to grow bigger, rounder, and bouncier.

Soon the entire platter was empty, and Rainbow Dash grabbed the jug of chocolate milk before rapidly chugging it down. She let out an audible burp after emptying the container, “Wow. That was something. I might have gone a little overboard,” Rainbow said with a small giggle, “I’ll just have to eat light for dinner. Not going to lose this giant belly at this rate,” she gave her expansive gut a smack for emphasis. Twilight and Spike both had to hide their respective arousal as Dash’s massive middle jiggled and wobbled like jello. That blue dome of a belly was like a huge exercise ball, capable of holding multiple meals worth of food.

“Are you sure you’re finished, Rainbow?” Twilight asked as her horn lit up. Soon after a loud gurgle was heard from Rainbow Dash’s stomach.

Rainbow Dash looked at her belly with surprise, and then to Twilight, “Twilight, what did you just do?”

Twilight only smirked as Spike rolled an entire cart full of deserts into the room. She then levitated a big slice of double-fudge cake into Rainbow’s mouth. Dash tried to resist at first, but her body seemed to work on auto-pilot once the delicious chocolate hit her tongue. She opened her mouth wide and soon swallowed the entire slice.

“We gotta keep that big belly nice and full. How else are we going to keep expanding your figure?”

“Twilight, are you seri-?!” Rainbow’s protest was cut off as Twilight shoved more cake into her mouth, which Dash had no choice but to chew and swallow, “You’ve been doing this all along?”

Twilight nodded as she forcefed Rainbow yet another slice of calorie-filled cake, “That’s right. It was just a professional experiment at first. But I slowly began to realize, I like you big. The larger you became, the more attracted to you I was. I can’t just let you destroy these amazing curves you’ve developed.”

Meanwhile, Spike had climbed on top of Rainbow Dash’s massive gut and was rubbing his hands all over her squishy flesh. He eagerly rubbed and pushed against her belly, watching in awe at how far he could sink in. “I’m sorry, Dash. But you’re just so awesome this way. So massive and plush.”

Rainbow blushed slightly as more cake was shoved into her maw. She was barely given enough time to protest further before the entirety of the cake had been stuffed into her stomach.

“Twilight, please...stop this...I won’t be able to move if I get much bigger.”

“You let me worry about that,” Twilight responded, “I’ll take care of everything.”

Twilight then levitated a large pie over, one of the dozens that Spike had recently baked. She decided to feed Dash by hoof this time, as she needed her magic for something else. During the magic expo, she managed to look over some very interesting research in partially mimicking the Changeling ability to hypnotize. There was no telling if it would work, but now was the best time to test it out.

“Listen carefully to my voice, Rainbow,” Twilight ordered in a very calm but firm voice as she looked deeply into Rainbow Dash’s eyes.

“C-Carefully…” Rainbow Dash replied, not being able to look away.

“You love food. You love being the biggest mare you can be,” Twilight suggest as she helped push the last of the first pie into her friend’s mouth.

“Love food...love being..b..n-no. I-I won’t let you do th-” Dash was cut off by a piece of the second pie being shoved past her lips.

“Shhh. Just let yourself go,” Twilight suggested. “It’s not like you could lose this weight anyway. Just look how big you are,” Twilight smiled as she slowly ran a hoof over the vast curvature of Rainbow’s towering belly. “There’s no going back now.”

“No going back…” Rainbow repeated as she accepted another slice of pie.

“You’re going to eat everything we give you, and you’ll enjoy watching yourself grow bigger every single day.”

“Enjoy...but...I don’t..wanna..” Rainbow Dash continued her attempts to resist, but Twilight’s spell continued to fog her mind. She tried to make herself focus on workouts, being athletic, losing weight. However, her mind kept drifting to how delicious all this sugary food was and how much she’d enjoyed getting to be so lazy. She had to get out of here soon or else she’d break. Unfortunately, any of her attempts to roll over were easily pushed back by Twilight. All she accomplished was making her belly wobble and jiggle like an ocean of jello, which just encouraged Twilight further.

“How much room does she have, Spike?” Twilight asked.

Spike gave Rainbow’s belly a good squeeze, feeling around for how taut it was. “Still super squishy!”

Twilight nodded, “Get the next wave ready,” she then turned back to Rainbow Dash,“Just let this part of you do all the thinking,” she gave Rainbow’s belly a light slap for emphasis, her hoof nearly bouncing off as Dash’s heavy blue gut rippled in waves on impact.

Spike returned with a cart of desserts packed with even more calories than the previous one. It contained upwards of 50 brownies filled with an obscene amount of chocolate chunks, nearly 3 dozen donuts with various fatty fillings, and the mother of all cakes that was lathered with dripping hot fudge.

“T-There’s no way I can eat all that,” Rainbow Dash mumbled, being temporarily let loose from Twilight’s intense hypnosis, “And I’m going to turn into a whale if you keep stuffing me at this rate.”

“Almost anything is possible with enough magic, Rainbow.” Twilight replied as Spike climbed up and forced the first of many brownies into Dash’s mouth, “As for you becoming a whale, that’s the whole idea~”

Twilight took alternating turns with Spike on stuffing Rainbow with brownies. All the while she began working her hypnosis spell again, “Just admit it, Dash. Deep down you enjoy this. You love to eat.”

“Love...to..eat,” Dash’s words were interrupted and distorted by all the chewing she was forced to do.

Twilight smirked as an audible gurgle came from Rainbow’s belly. It seemed her gut was already starting to process the new calories. However, a few deep pokes suggested that the massive mare still had plenty capacity for more. Looking back at the cart Twilight could see that Rainbow was already consuming her eleventh brownie. “Doesn’t it feel so good, Rainbow? All you have to do is lie back and let us stuff your big blue belly.”

“B-big...blue..belly…” Came the distant response.

“You won’t be the fastest mare in Equestria anymore, but you can certainly be the biggest.”

“B-biggest..”

Soon 20 brownies eaten became 30, then 40, and within impressive time the last had disappeared down Rainbow’s maw. The stuffed mare’s protests became less frequent throughout the process, and she was almost silently accepting it all as Twilight and Spike begin stuffing her with apple fritters next.

“S-So good...mmmm..so much,” Rainbow Dash began idly rubbing what small portion of her belly she could reach with her fattened and heavy hooves. The bliss of all this delicious food was clouding out previous resistance, and she found herself becoming more tired as her belly filled. “Feel..full..”

“Don’t worry, Rainbow. You still have some room, and you’re almost there,” Twilight nodded to Spike to ready the cake as Dash swallowed the last apple fritter. “All you’ve gotta do is eat this cake, then you can sleep and digest all those calories. Sound good?”

Rainbow Dash nodded, lazily opening her maw for the first slice of cake. It was clearly the most sugary selection of the night. All the chocolate and hot fudge hitting her tongue was almost enough to overload her taste buds completely. The first slice was quickly followed by a second. A small part of Rainbow’s mind shouted for her to stop this, but she no longer had the energy or the care to do so. Twilight was right, it was so much easier to sit back and enjoy this.

Twilight shoved the third slice into Rainbow’s mouth, noticing that for the first time tonight Dash’s belly was starting to rise. It was pretty impressive how much food Rainbow could consume before swelling. Her stomach capacity was likely already the greatest in Equestria.

“Now, Rainbow, I know you’ll probably fall asleep soon so there’s something I need you to remember. When you wake up, you’ll forget that I was behind any of this. You’ll remember that you did this to yourself. You’ll love your new size and won’t resist growing even larger. Got all that?”

Rainbow nodded blissfully while continuing to accept every slice of cake being pushed on her. It was at this point Twilight decided to step back and let Spike do all the feeding, meanwhile, she was free to rub and message Dash’s gut. It was now emitting deep and loud gurgles, already going into overtime to digest the massive load of food given to it. Twilight couldn’t even begin to fathom how many calories were currently in this belly. Twenty thousand? Thirty thousand? More? In any case, it would certainly result in an even bigger Rainbow Dash by morning.

Five slices. Six slices. Seven slices. Rainbow Dash could barely keep count as Spike forced bite after bite upon her. Even as she felt her belly stretching beyond normal capacity she couldn’t stop. She found herself feeling even more tired, her body wanting to just pass out so it could digest all this food. The moment she swallowed the final piece of cake she laid her head back and drifted off into a deep sleep.

“Wow, what a night. I can’t believe she really ate it all,” Spike remarked.

“This is nothing. Just wait until a month or two from now. I don’t think we’ve seen the limit of her gluttony yet,” Twilight sighed contently as she listened to the regular gurgling of Rainbow’s belly. Thanks to Twilight’s magic, Dash’s body was already hard at work digesting the sugary treats and sending the calories all over her body. By sunrise, those calories will have turned into several pounds of new fat deposited in various parts. Twilight amused herself by trying to guess what part of Rainbow’s body would grow the most. How many inches would add to her waistline? How much wider would her flank be? So much growth, and still so much to come.

“Let’s give her some time to rest. Be sure to wake up early tomorrow though, I want to have a good follow-up breakfast waiting. Just in case tonight wasn’t enough to push her all the way.”

Twilight decided to sleep next to Rainbow that night. She fell asleep to the pleasant sounds of Dash’s belly working overtime to expand her to even greater sizes. Rainbow Dash would awake not only as a larger mare, but one thoroughly hypnotized to love and enjoy the process of gaining weight.

Rainbow Dash’s eyes slowly fluttered open as sun shined through the window. The first thing that greeted her was the sight of the massive blue dome which comprised her belly. It totally obscured any view of her lower body. It was no longer painfully stuffed as it was last night but still felt a bit heavier in its own right. Rainbow reached out and began to rub the sides of her gut, feeling a strange surge of arousal as the fatty flesh squished beneath her hooves. The jello-like flesh allowed her hooves to sink in impressively far. She would have just been content to lay there for awhile, but motivation to move soon came to her. A wonderful smell moved in from the kitchen, one which caused her stomach to give a very aggressive growl. Rainbow began trying to roll herself over but struggled to do so. Her massive middle weighed her down like an anchor and jiggled endlessly as she rocked back and forth. Eventually, she managed to get on to her side, and then rolled on to the floor. She managed to get all four hooves on the ground, but only barely. Walking would be even more difficult. She was forced to spread her legs as wide as possible when she attempted to waddle for the kitchen. Even still, she could feel her belly dragging against the cold floor. She felt another surge of arousal. This state of near-immobility should have panicked her but yet she felt a perverse excitement about it. She huffed and puffed as she dragged her body across the room one very small bit at a time. It took her the better part of ten minutes to force herself into the kitchen.

In the kitchen, she saw Twilight and Spike hard at work preparing a massive buffet of a breakfast. Pancakes, french toast, waffles, cinnamon rolls, and several types of breakfast pastries were all being laid out. Twilight and Spike had modest plates with modest meals. However, on the other side of the table was a growing stack of food big enough to feed an entire house of ponies and then some. In front of that enticing buffet were a set of three full-sized chairs tied together. These chairs were draped with a ribbon that had “Rainbow Dash” written in big letters.

“Good morning, Rainbow Dash.” Twilight greeted with a giggle, “Well, almost afternoon now. Don’t sweat it though, you had a long night. Ready for some breakfast?”

Rainbow Dash nodded with a dopey smile on her face. She drug herself over to the table before attempting to sit down on the improvised multi-chair. The furniture groaned heavily as Rainbow’s obscenely large plot cheeks began to squish out all over them. Her massive rump was so big that it slightly hung off the sides of this extra-large seat. Meanwhile, she was forced to support her massive gut upon the table. It was at this point she realized there was no way to reach the food on her own. She was simply too large for her hooves to reach around her belly.

“Need some help?” Twilight and Spike approached her side with eager smiles. Rainbow Dash couldn’t even finish nodding before Twilight started using magic to feed her the first of the waffles. She was put into an immediate state of bliss from just the first bite. Her feeders had layered the waffles with obscene amounts of syrup and butter. The overwhelming sweetness made the food even more irresistible to her, in addition to promising more calories. She was on to her second and then her third waffle before she even knew it. The opening of her mouth and subsequent chewing of food was a nearly automatic process. By the fifth waffle, there was a small voice in her head which suggested to her she had enough. However, this idea was immediately shoved out of the way by a much more powerful urge to continue eating. She couldn’t stop until her belly was entirely full. Besides, it would be rude to not eat everything Twilight and Spike prepared for her. Any remnants of resistance quickly faded as she resolved to lay back and let her friends stuff her with the entire buffet.

Twilight noticed the waffles were nearly gone and began readying the pancakes. She emptied an entire bottle of syrup on to them in preparation. Meanwhile, Spike began the ambitious task of climbing on the table and then up Rainbow’s belly. Twilight giggled at the sight, marveling at how incredibly small her assistant was in comparison to the massive blue blob spilling out over much of the table. Spike eventually made it and laid himself out just in front of Dash’s chest. He gently grabbed hold of Rainbow’s fat and eagerly sunk his hands into the excess flesh.

“You’re so soft and bouncy, Rainbow. I could use your belly like a water bed.”

“Well if you keep helping Twilight make all that delicious food I suppose I could let you,” Dash gave a wide smile as Twilight levitated the second plate of pancakes over to Spike. The two then began taking turns shoving one pancake into Rainbow’s mouth after another, with every bite pushing her further into gluttony. She had a hard time even remembering why she used to be so obsessed with exercise. Why not just stay inside to enjoy all this amazing food and relax?

Twilight took a small break midway through the feeding session to admire Rainbow’s flank and her cutie-mark in particular. Her signature cloud and lightning bolt stretched heavily across the side of her rump. It was undoubtedly large enough to be spotted from many feet away. Twilight reached a hoof out and began to gently rub the side of her friend’s plot. Just the cloud of Dash’s cutie mark was bigger than Twilight’s hoof, and her face as well. Just for the fun of it, she decided to turn around and place her own cutie-mark right up against Rainbow Dash’s. Sure enough, her friend’s was big enough that Twilight’s own symbol could fit inside of it. Ironic that a cutie-mark which represented speed was now being stretched across one of Equestria’s fattest backsides.

“Hey, guys. I’m getting a little thirsty, got any milk?” Rainbow Dash asked as the pancakes were finally depleted.

“Sure do!” Twilight smiled as she levitated an entire keg of milk over and began pouring it into Rainbow’s mouth. Rainbow began eagerly drinking the thick liquid down, and her belly started to expand slightly as her capacity started to be stretched once again.

Gulp...Gulp…Gulp..

The blue mass of her middle stretched out even further, now reaching all but the farthest edges of the table. Both the table and the chairs beneath Rainbow were now creaking from the weight of the mare above them.

“Mmmhh...so full…” Rainbow panted as the milk jug was finally withdrawn. She began gently rubbing her belly as it gurgled with the contents inside.

“Don’t give up yet, Rainbow. There’s still little more to go.” Twilight gave her an encouraging smile as she readied two large plates of french toast.

Rainbow Dash bit her lip, “Well...I suppose I could stretch a little more.”

“That’s the spirit,” Twilight made sure to hand the second plate off to her accomplice as they continued their work. It probably wasn’t necessary to rush things, but Twilight was eager to pump as many calories into Rainbow Dash as possible. She knew if she played her cards right she could get Rainbow to the point of immobility by tomorrow or even the end of the day.

One slice. Two slices. Three slices. Four slices. Rainbow Dash couldn’t even keep up with as fast as Twilight and Spike fed her. She only barely had time to chew one piece before another was pushed on her. She could feel her belly continuing to stretch, and despite having just woken up not long ago she was starting to feel drowsy again. It was likely her body trying to force her to sleep so it could digest the incredible amount of food she consumed. Her feeders realized she was slowing down, so both began actively rubbing her belly to encourage her the rest of the way. To her own surprise, she managed to finish every bite. However, this was just before the table and chairs both gave way. Thankfully, Twilight was able to shield herself from any flying pieces. Rainbow was naturally fine, as her plot acted as two giant bags of cushion. Meanwhile Spike barely felt anything other than some extra jiggling from Dash’s belly.

“Whoops...sorry, Twilight. I’ve been breaking a lot of furniture lately,” Dash blushed heavily as she looked at the devastation.

“It’s alright, Rainbow. I should be more prepared when taking care of a mare your size. I’ll order replacements,” Twilight went to work sweeping up the pieces as she spoke.

Rainbow’s belly gurgled more aggressively, and she could even feel the added weight from her massive breakfast, “I’m going to be putting on some more pounds from this, aren’t I?”

“Ooooh yeah. You might not even be able to move when you wake up from your next nap.”

There was a small moment of clarity in Dash’s mind that railed against this, but she instinctively pushed the doubt aside once again.

“No, this is okay.” Even if she wasn’t able to move, she knew Twilight and her other friends would take care of her. Plus, It wasn’t like she could do anything about it even if she wanted to. She was barely able to walk to the kitchen this morning. Trying to exercise was a lost cause. All she really wanted to do was let herself fall asleep so she could process all this food and relieve her burdened stomach. In a few more moments she had drifted off into deep slumber once again.

A few months had passed since that day. A few more sessions of stuffing and hypnotism had left Rainbow Dash immobile and enjoying the fact. No longer able to walk, she spent her days being stuffed silly by Twilight Sparkle and Spike. Whenever she wasn’t eating, she was usually being washed or being played with by her caretakers. The two weren’t always there of course, which is why they left Rainbow Dash with access to endless amounts of Daring Do books, comics, and other forms of entertainment that didn’t require movement.

During the first weeks Rainbow was kept on the very same couch she first lost her mobility on. However, by the end of the first month, she became so large the couch snapped. She was then moved to a reinforced bed, and by the end of the second month, even that was starting to strain.

Twilight and Applejack had just finished putting together the pieces for Rainbow Dash’s third bed when they decided to take a break and go check on her.

“How do ya think the others are doing?” Applejack asked, “I bet they have their hooves full.”

Twilight giggled, “I don’t doubt it. I really appreciate you all pitching in to help.”

Applejack waved a hoof, “Ah, it’s nothing. It’s still hard to believe how massive she’s gotten though. I don’t know if there’s ever been a pony her size in history. How much does she even weigh now?”

“Well over a thousand pounds. I don’t know if she’s the biggest pony Equestria’s ever seen, but she will be soon at this rate.”

The two pushed into a large washroom that had been prepared specifically for Rainbow Dash. Her massive form was currently occupying a custom-made bathtub which was as large as a pool. Fluttershy, Pinkie Pie, and Rarity were hard at work trying to clean her. There was a lot of her to clean, however. Rainbow Dash smiled awkwardly as she felt her friends grabbing and rubbing the various parts of her fat body.

“H-Hey there, you two,” Rainbow Dash greeted, her voice heavily deepened by all the fat on her neck.

“Hey there, Rainbow,” Twilight responded with a smirk, eyeing up her friend’s form. Rainbow’s giant dome of a belly could easily substitute a king-sized bed. Twilight had spent many nights sleeping soundly on her friend’s massive gut, listening as it churned away digesting tens of thousands of calories that would make Rainbow Dash even larger. Her belly button was practically a small cavern. It was so large and deep one could stick their entire hoof in, or their head if they were brave enough. Further down was the absolute marvel of her hips and flank. Her hips were so wide that she had to be forcibly shoved even through double-doors. Her massive plot cheeks were positively obscene in their size and shape. Each massive boulder-sized sphere of lard was big enough for one pony to rest on. Her cutie marks were over five times their normal size, large enough to be seen from a great distance away. Twilight realized that the old Rainbow Dash would have been able to sleep comfortably on a cutie mark that size. It really hit home just how much of a whale she’d become. Looking even further down, Dash’s thighs were so massive and thick that her actual hooves looked like tiny stubs which barely stuck out from all the fat.

“How ya feeling, Rainbow?” Applejack asked, shaking out of her daze before Twilight could.

“Bigger than ever. I really appreciate you all helping me out until Twilight can find a shrinking spell.”

Twilight chuckled lightly, “It’ll still be a little while on that. But don’t you worry, I haven’t given up. In the meanwhile, I’ve found something new for you to do. Apparently, Photo Finish is interested in taking some pictures of you.”

“What, why?”

Twilight shrugged, “Some ponies like big mares, and you’re probably the biggest. I doubt most ponies would even believe your size unless they saw it.”

Rainbow Dash’s puffy cheeks turned a shade of red, “W-Well, okay. Don’t suppose I have anything better to do.”

“Great, once you’re washed up and we can start getting it all ready. You’re going to be quite famous after today. Even if it’s for different reasons than before.”

“I hope they have a reaaaaaally big camera,” Pinkie teased, “I tried to take one of Rainbow a few weeks ago and the entire picture was just a bunch of blue filling the frame.”

Meanwhile, Fluttershy began washing Rainbow Dash’s flank. She tried to not make it look like groping, but the others could tell how she was intentionally grabbing and rubbing a small part of Rainbow’s right flank cheek. She had to ask Twilight for magical assistance when moving on to the back of Rainbow’s legs, as Dash’s plot easily weighed a couple hundred pounds on its own.

“How're your plans for designing an outfit coming along, Rarity?” Twilight asked as both unicorns used their magic to hold up Rainbow Dash’s backside so the others could wash underneath.

“It’s the most difficult fashion undertaking in history. Particularly since her measurements are continuously increasing, but I think I’m close to a breakthrough. I’ve really enjoyed this unique challenge.”

“I look forward to seeing what you come up with,” Twilight gave a slight smile. She had to admit it would be pretty enticing to see all of Rainbow Dash’s fat being squished into a piece of clothing, even if she’d outgrow said clothing in just a week or two at most.

After the washing was concluded the group, through much effort, moved Rainbow Dash into a large makeshift studio which was going to be used for the photoshoot. It took the better part of an hour to get their massive friend in position. However, they managed to finish just in time for Photo Finish and her crew to arrive. She was absolutely awestruck upon entering the room.

“Mien goodness...you told me she had gotten even larger...but I never expected to this extreme.”

“I hope that won’t be a problem,” Twilight mused.

“Not at all!” Photo Finish turned to her crew members, “Ready ze wide angle lenses!”

The underlings quickly went to work setting up cameras around the room. It was already clear that they wouldn’t be able to get all of Rainbow Dash in frame no matter how they positioned, so the strategy was to capture her one area at a time. First, they had her rolled over on her back so they could take shots of her mountainous belly. It reached up over halfway to the ceiling and required a pegasus to fly up and capture downward shots. Said pegasus gave out a light squeak of fear when she nearly fell into Rainbow’s cavernous belly button, which was probably large enough to hold her.

“Now for her flank, get her rolled over!” Everyone in the room worked to get Rainbow Dash on to her belly. The immobile mare jiggled almost non-stop as her belly squished out beneath her like an obscenely large balloon.

“Give us a shake!” Photo Finish ordered next.

Rainbow Dash bit her lip and mustered what control she had left in her lower body to start clapping her boulder-sized plot cheeks together. Extremely lewd slapping sounds filled the room as the massive fleshy spheres slapped against one another. “Like this?” Rainbow Dash blushed heavily at showing herself off in such a manner.

“That’s perfect, keep it up!”

Twilight flapped her wings and flew up in front of Rainbow Dash’s face, “Having fun, Dash?”

Rainbow gave a slight nod, “It’s really nice having all this attention. I guess I’m going to be Equestria’s most famous freak show after this huh?”

“Maybe, but you’re the best-looking freak show I’ve ever seen.”

“Hey, Twi. This is kinda a lot of work, think I could get some food after this?”

“Oh, Dash. Have I ever let your stomach go empty?” The two giggled together. Twilight couldn’t have been more satisfied with this outcome. This experiment had definitely been a resounding success.