Author's Note

Content warnings: Macro/micro vore and regurgitation

The Experiment

Midnight concentrated on a tray of decadently frosted cupcakes that lay on the table before him. If this spell worked, they would be reduced to a fraction of their size, yet be just as flavorful and filling as they would in their normal size. The idea had come out of nowhere, it seemed ludicrous, but then Midnight figured, perhaps miniaturized foodstuffs could be beneficial and practical. After all, if one needed more space to store or carry food, then entire meals shrunken down to bite-sized would enable one access to a full meal anytime anywhere without worrying about carrying a lot of food on their person. All he had to do was get this shrinking spell right and then apply a food-preservation charm.
An aura of turquoise blue surrounded his horn, and then the tray. The cupcakes vibrated slightly, a few even lifting an inch or two off the tray, but nothing else seemed to happen.

“Hmm, just a little more power,” he mumbled to himself, and the glow doubled in intensity. "Not yet... Almost…”

Suddenly, there was a clatter from the other room followed by the quick clop of little hooves on the floor. The door flew open and Twinken galloped in, the little unicorn colt bubbling with excitement. He seemed almost like an indigo blur, his brandeis blue tail streaming behind him, and a set of heavy saddlebags bounced on his sides.

"Hi big bro I'm home, you won't believe the day I had at school, oh sorry I see you're busy, I'll be back in a minute bye!" Twinken rattled off in a rush, bumping against the work table where Midnight had some of his alchemy equipment, including a few beakers and phials full of potions and alchemicals, as the colt whipped around and galloped out of he room nearly as quickly as he'd come in.

Midnight's head jerked up, about to scold the colt about being careful in his workshop, but at that moment the spell he'd been charging fired off, missing the tray and instead rocketing at a nearby enchanted mirror, deflecting off and hurtling back at the unicorn.

His eyes widened. "Oh...buck me!"

The spell hit Midnight, which felt similar to being hit by a water balloon as the magic burst and washed over him, and suddenly, the world seemed to shift around him, everything warped into a kaleidoscope of bright colors, forcing him to squeeze his eyes shut. Then, suddenly there was a loud ‘pop,’ and the colors faded. When he opened his eyes he was lying on his back surrounded by something soft and pink and blue. Frosting! His nose was filled with the sweet smell of the confection as he looked around, finding himself to be sprawled out on top of a cupcake that seemed now to be the size of a bed. Attempting to light his horn produced only a few crackles and sparks, and shot a sharp twinge of pain through his head.

“Well that’s just great!” he grumbled as he struggled to sit up but the frosting and cupcake were so soft and sticky underneath him.

He was so preoccupied he didn't notice as a shadow swept over him, and he looked up to see the towering face of his now not-so-little brother beaming down at him. Or rather, at the cupcakes around him, since Twinken didn't look directly t the shrunken stallion and Midnight realized, He doesn't see me!

Of course not, he was half-buried in blue frosting, blending in with the confection.

"Midnight!" the colt called out, looking around briefly. "Where'd you go? I wanted to tell you something!"

With one last glance around and a shrug of his shoulders, Twinken's gaze returned to the tray as he licked his lips and his crimson red eyes glinted with mischief, "I hope you mind if I have some of your cupcakes...!"

Abruptly one of the cupcakes next to Midnight lifted into the air and soared into the giant colt’s mouth. Hardly any time was taken to savor the treat, two quick chews and it was swallowed down with a loud gulp in one big lump which was visible as it traveled down Twinken' throat and disappeared into his chest. Within seconds the only evidence it had ever existed were a few flecks of frosting on the colt’s lips, before those were licked away as well with a swipe of his tongue.

Uh-oh! Midnight thought before scrambled to get off of the cupcake, but the thick frosting and soft cake underneath it might as well have been quicksand, as the more he struggled the deeper he sank.

Ceasing his efforts to extract himself, he returned his attention to Twinken, waving his foreleg and calling out,“Hey, Twinken! I’m down here, don't touch any more of the-”

The ‘ground’ beneath Midnight lurched as his cupcake lifted into the air. His hopes rose, thinking his little brother had heard him. Those hopes were dashed with horror, as the view of his brother’s face was eclipsed by a gaping pink maw, saliva coating the walls and dripping onto a tongue that seemed to wriggle in anticipation. The rows of white teeth that normally framed a kind smile now appeared to him as giant deadly boulders ready to crush his bones, but even that paled in comparison to the gaping abyss of Twinken's throat that waited beyond.

Another attempt to call out was lost on his breath as he shot forward like an arrow, impacting the roof of the mouth, and being shoved deep into the cupcake like a whack-a-mole being hit with a mallet. He struggled briefly in the suffocating mass before a giant tooth cleaved through a hair from his muzzle, offering him one last view of his workshop. He reached out a hoof in one last bid for freedom before the mouth closed, sealing him in darkness. There was a loud ‘GULP,’ and he felt himself pulled backwards by an immense force. He took a deep breath and held it. If the situation he was in seconds ago could be described as claustrophobic, the crushing pressure that enveloped him now was overbearing. Slick walls of muscle kneaded against his face, and crushed the cake into a sticky mush around him, pushing him down, down, down.

The deep ‘bum-bump, bum-bump' of his brother’s heartbeat grew louder and louder until it was almost deafening, seeming to be right on top of him at one point, before slowly fading into the background somewhere above him.

After what seemed like an eternity, though it had only been a few seconds, the cake broke away beneath him, and the pressure vanished as he was roughly deposited into an open space. A damp splash sounded under him, and the last of his body broke free from the mass of mush beneath him, leaving him sprawled atop it.

Realizing he was still holding his breath, Midnight exhaled and breathed in a deep gasp of hot, humid air that smelled of a nauseating sweetness. His nose was assaulted by the stench of bile and various foods, and his ears flattened to the sound of gurgles and splashes all around him.

He shakily got to his hooves, the mass beneath him shifted precariously, but seemed like it would hold for now as it rocked back and forth to a gentle kneading from the stomach wall.

Concentrating, he was finally able to light his horn, though just barely, and though it sent dull throbs of pain through his head, he held it. Though he knew there was no way he could do any more than hold it for now, the dull glow did at least illuminate his surroundings with a turquoise blue glow.

He was in what seemed like a shallow pool filled with mostly unidentifiable bits of food, surrounded by pulsing pink walls with a slightly purple hue. Just above and in front of him was a tightly clenched ring, the sphincter, which he knew is what had deposited him here.

“Ugh... no way I’ll be able to get up and out through there,” he muttered.

Even if he could, he knew there was no way he could claw his way back up the throat in any case. He also thought of the other hole he knew resided somewhere in that pool below him, but dismissed that though immediately. If there was any part of his brother he wanted to see less than here, it was where that would lead, he thought with a shiver. He snuffed out his horn and sat down.

Well, he was stuck for now, but as long as his ‘island’ held up, at least he’d have time to rest and hopefully come up with something.

*******************************

Twinken trotted back upstairs, licking his lips. Those cupcakes sure were yummy, but he had to wonder why his brother had just left them sitting out in his workshop.

Surely if they were meant for any kind of special occasion Midnight would have mentioned it. He hoped they weren’t part of some sort of experiment, he could have sworn he’d felt one of them move. Where was his brother anyway? He had just seen him!

Plus, Midnight had mentioned he would be spending the better part of the day in his workshop, and Twinken had wanted to let him know that he was going out to see some friends, and didn’t want him to worry.

Then again, his big brother did tend to get caught up in his work every now and then. With a shrug he scribbled out a quick note which he left on the table, and trotted out the door.

A short walk through town later, Twinken arrived at Sugarcube Corner. The tall and sweetly decorated building was abuzz with activity, and it seemed nearly half the town had decided to treat themselves today.

“Hey Twinken, ‘bout time ya showed up!” a voice called, and Twinken turned to see his good friends Apple Bloom and Scootaloo trotting up to him, the former having been the one who called out.

“I know, I know,” Twinken shrugged. “I would have been here sooner, but I wanted to let my big brother know first, and couldn’t find him anywhere. So, what’s up?”

Scootaloo flipped open a saddlebag with a grin, revealing over a dozen glass bottles. “Sugarcube Corner just started selling what they’re calling ‘the fizziest soda in Equestria! We were gonna head over to Sweet Apple Acres and see how many we could drink without burping. The loser has to eat one of those jalapeno red velvet cupcakes that Pinkie makes. You in?”

“You know it!” Twinken smiled, and off they went.

************************

Midnight's eyes slowly fluttered open. Strange, he didn't remember falling asleep. The slow rock of the stomach and that steady kneading must have caused him to nod off. Then, he felt a wet sensation on one of his hind legs.

With a frown he lit his horn. Though the magic seemed to come a little easier this time, he knew it still wouldn't be good for much more than light. The fact that it was recharging gave him hope though.

If he could rest long enough, perhaps he'd be able to teleport out of here. That plan immediately shattered though as he looked back. His island had crumbled and sunk a bit more, and his left hind leg lay partly submerged in the pool. He jerked it out with a start. The fur on it felt much softer, and the fluid bubbled and fizzed slightly as the last of it dripped off his hoof, leaving it with a polished shine as if he had just returned from a high end spa. Okay, time definitely wasn't on his side.

If he were inside somepony else, Midnight wouldn't be as worried. Regular ponies didn't eat meat, so their systems didn't digest it well. Except, like himself, Twinken was a lunar pony, thus they could eat and digest meat just fine.

Was he doomed to be digested and become part of his little brother, who would never know of what he'd done? No! Where had that thought come from? With a shudder, he drew himself in tighter on the 'island', careful not to disturb his already unstable perch.

*************************

A colt and two fillies sat in a circle in a barn, reclining on hay bales that had been moved around to create makeshift chairs. In front of them a couple packs of soda rested on the floor.

Scootaloo reached out and grabbed one with a wing, a cocky grin on her face. "Okay, who wants to go first?"

"Ooh, I do, I do!" Twinken exclaimed, snatching the bottle in his magic and popping the cap in one deft move. Bringing it to his face, he gave it a sniff. Mmm, orange and fizzy.

The two fillies shared a glance before turning to him with excited grins.

"Three...two....one....chug!" they chanted in unison, and without a second thought the colt tipped the bottle back and did just that.

Twinken's eyes watered as his nose was assaulted with bubbles, and his tongue tingled, but he pushed through, and in seconds the bottle clattered to the floor in front of him, empty. The colt gasped as he toughed out the discomfort before reaching for his next bottle of soda and the fillies chanted 'chug, chug, chug' again, and the more he drank the worse his discomfort got while his tummy began to distend from both the liquid soda and the carbonated gas fizzing inside of it.

Twinken managed four bottles total before he couldn't stop the tears of discomfort and finally stopped to catch his breath and groan from all the soda he'd just drank without pause.

"Aw c'mon, Twinken, keep going!" urged Scootaloo. "N-no, Scoots, Ah- Ah think he needs a break," Apple Bloom said kindly and the colt gave a grateful nod as he held his tummy and blinked away the tears while steadying his breath.

After a minute or two, all was fine for a moment, as Twinken sat up and slouched in his hay bale seat...and then his belly let out a loud rolling gurgle while shaking from the fizzy gas inside that grumbled for release, causing the fillies to giggle with slight disgust and intrigue.

Twinken crossed his eyes as the pressure built. "Girls, I think- I think I'm gonna..."

*BRAAAAAAAAAAAAAAAP*

*****************************
Earlier...

Lost in thought, Midnight was rudely knocked back into reality when the sphincter opened up above him and drenched him in a cold shower of orange soda. Almost as soon as it stopped, another came, and another. Until it finally stopped pouring.

"PPPbbth, AGH! WHAT?!" Midnight shook himself in a vain attempt to get dry, but it was pointless, since he was already sweaty and slickened by his brother's stomach juices. Now he was sticky with soda, though he couldn't deny he felt a tad cooler from the cold soda cooling him up after spending around an hour inside a humid, stinky stomach.

Regardless, he grumbled, "When I get out of here, that colt...!"

Before he could finish that sentence, Midnight could feel everything rising as the stomach filled rapidly, pressure building around him.

"Oh no...!" Midnight moaned as he realized what was happening, when more soda poured in.

The soda fizzed and bubbled as it made contact with Twinken's gastric juices and began to fill the fleshy sac up, flooding Midnight's 'boat'.

"Oh no!" Midnight echoed, more panicky than before, as he struggled to keep balance on his 'life raft' of partially chewed and digested cupcake... only to sink through it as it dissolved and broke apart, leaving Midnight to struggle to swim in bubbling soda and the remains of Twinken's food!

His ears popped, and he struggled for each breath as the pressure around him increased exponentially, what little air remained was quickly being replaced with gas.

"TWINKEN!!" Midnight screamed in abject horror and panic as he struggled to keep his head above the liquid flooding around him. "TWINKEN, I'M INSIDE YOU! YOU- YOU GOTTA BURP!! TWINKEN, HELP ME-"

And just like that, the colt's belly was full with nary a breath of air for his big brother, who'd just managed to inhale what little had been left as he went under.

Breaching the surface with a gasp, Midnight was thrown around like a ship in a storm as the stomach roiled around him. What had started as a cascade of fizzy, sticky liquid pouring down on him and tossing him off his perch had rapidly transformed into a bubbling ocean that crashed around him in waves, threatening to pull him under as it seethed around him. He rebounded off warm fleshy walls, sinking in and being thrown back as if it were some kind of organic bouncy castle. His head was pulled under again, and he got a mouthful of sweet orange flavored liquid. Just as he was starting to fear he might drown, pressure seemed to build, and the stomach gave a massive heave...!

*BRRAAAAAAAAAAPPPP*

A deep continuous belch echoed all around him as the sphincter opened wide, rippling from the force of the bassy blast.

Before he knew it, he was flying. Slick walls brushed his shoulders as he was forced through a tight fleshy ring, and then he was rising. Light, actual daylight, appeared as he rocketed upward. Fresh air washed over him as he took a deep breath, and before he knew it he was free!