Rouge stood there in complete shock as she took stock of what had happened to her, the sounds of Amy's laughter echoing in her ears as she stepped out of the pile of her own clothing.  Her body diminished, her stature shrunken, her breasts, gone.  
"You, you, YOU!"  Rouge screamed as she marched towards Amy, the hedgehog's laughter sputtering out as she saw the anger on Rouge's face as she approached, but unlike before, the two of them were now the same hieght, roughly so anyway.  

"Me, me, what?"  Amy responded, hands on her hips, glaring right back at the bat, causing Rouge to back away slightly.  Before shrinking, Amy was just some brat, but they were the same size now, the hedgehog in front of her was a lot more intimidating.  Glancing around for a moment, Rouge simply sighed.  

"What are we going to do now?"  Rouge lamented as she turned about and kicked her pile of clothes, sending them across the floor.  "I'm a fucking shrimp and that Emerald is still inside of you!"  Rouge then sat herself on the floor, entirely upset with how things had gone.  
Amy was completely unaware of what was going on, so she just looked down at Rouge and said.  

"Explain."  

The bat, with few options, shrugged her shoulders and said.

"Alright.  So, Eggman was escaping from his fight with Sonic."  

"Sonic?!"  Amy quickly interrupted, getting a glare from Rouge, who continued.

"He was escaping, using his robot as a distraction to get away.  I had been watching from a distance the entire time, because I knew he had a Chaos Emerald on him, and I wanted it.  So, I trailed him away from the fight, knowing that he'd used up all his forces keeping Sonic at bay, I swooped it to snatch it.  Naturally he wouldn't give it up, which is when he ended up falling out of his machine.  I intended to retrieve it from the splat he made on the ground, but to my surprise, I went down there and found out you'd swallowed him entirely!"  

"Ooh..  So that's why that happened.."  Amy said, finally understanding why Eggman just fell from the sky.  

"Yeah, and since I wasn't about to do him any favors, I figured I'd let your belly just..  Filter things through and retrieve the Emerald afterwards, I had no idea you'd make some gas explosion and use it's power to shrink me!"  Rouge said, obviously still angry, though Amy looked a bit confused.  

"Shrink?  I think you got younger."  Amy told her.  

"What's the difference?"  Rouge snapped at her.  

"Well, for one you don't got boobies no more."  Amy chittered much to Rouge's displeasure.  "And your probably going to need a diaper too!"  She added.  

"Diaper?!  I'm not some dumb baby like you, I don't need one of those.  But I do need something to wear, none of my clothes will fit like this."  Rouge stated, Amy frowned at Rouge's insult, but was also occupied with her own issues.  

"I need a new diaper too."  Amy said, not wearing anything below her skirt at the moment.  "Oh, and I need to get this Emerald out of my belly..  Though maybe I can use it to help me catch Sonic.."  Amy said to herself.  

"Well, I agree with that at least, I want my Emerald, and you need it out before it does some worse damage, but I also need to get turned back to normal."  Rouge stated as she stood up.  Though as she did a sudden shiver rushed down her spine and a desperate urge radiated from her bladder, making the bat suddenly dance in place.  "F-fuck..  I gotta pee!"  Rouge said, making a mad dash for the bathroom.  

Amy just chuckled to herself as she slowly followed Rouge.  The bat tore through her house, quickly getting to the bathroom, thankfully the toilet was no issue, having wings meant she could simply flutter up and sit on it.  Doing so, a hot stream of piss began to forcefully spray against the bowl.  "Ooh yess.."  Rouge sighed in immense relief, she hadn't known why the feeling had come up so suddenly, but she didn't question it at the moment, all that mattered was that her bladder was emptying, and she peed for a few good moments too.  As she sat there she began to feel a dull sort of heaviniess in her gut, a sure sign she needed to relieve herself another way, but after a few subtle pushes, and some rather unsubtle ones, accomanied by several noises that could only best be described as grunts, Rouge gave up, taking the feeling to be a false alarm of sorts.  

Shortly after that Amy came into the bathroom.  "You done?"  she asked, looking at Rouge up on the toilet.  Rouge just glared back at her as she wiped, flushed, and got down.  "Shut it."  Rouge commented as she used her wings to fly up to the sink and wash her hands, only really doing so because Amy was in the room with her.  

"So, what's the plan?  How do I get this Emerald out?"  Amy asked Rouge after she came back down.  

"As much as I'd like to just strap you to the toilet and forcefeed you laxatives until it rockets out of you, I have a feeling that might not work.  Aside from that, I'm worried you'll do something worse to me in the process.  So there's only one thing we can do, we need someone who knows more about this stuff, and since you ate one of them, we'll just have to go to Tails."  Rouge told her as they both walked out of the bathroom, heading for Rouge's bedroom.  

"Oh yeah.  I guess we don't have to worry about Eggman anymore."  Amy stated, Rouge rolled her eyes however.

"Somehow I doubt that, I'm sure that guy is crazy enough to have some kind of plan in place in case he dies."  Rouge said as she went into her bedroom, while Amy stayed just outside the door.  

"I'll find something to throw on and we can go."  Rouge said as she went to her closet, most of her clothes were out, but she did have this shirt she wore as pajamas sometimes.  Getting it out and throwing it on, it was a baggy white tee shirt with letters in red that read 'Bad Girl' in stylized letters.  It was baggy on her as an adult, so naturally it basically went all the way down and dragged on the floor.  "Great, let's go to Tails, I hope he's not too busy."  Rouge said, flying up, finding that she moved more quickly in the air now that her legs were shorter.  

As Rouge left the bedroom, Amy followed her.  "I guess I'll just follow on the ground."  Amy said as they got outside.  

"Well, you could take this dumb thing, it's how I hauled you back here."  Rouge told her, pointing to Eggmans floating craft.

Amy looked at the machine, seeing that it looked a bit damaged, and the inside of it was also pretty rough looking.  "Alright."  Amy said, hopping up into it.  "How do I drive this thing?"  

"Here, he was using this thing."  Rouge pointed out a steering wheel-esq joystick.  Amy grabbed it and moving it caused the machine to lurch in the direction it was pointed in.  "In fact it's probably a good thing to bring it, maybe we can use it to pay Tails to fix this mess."  Rouge mentioned.

"You think he'll ask us to pay him?"  Amy questioned.  

"Well, no, but better safe than sorry."  Rouge said as she began to fly.  Ultimately another reason she wanted to bring it with was that she was certain Eggman's device for locating the Emeralds was built into this thing, so if she could get Tails to find it and take it out for her, maybe make it into something she could use, all the better.

And so, they were off.  Rouge and Amy went at a fairly liesurely pace given Rouge wasn't the fastest flyer, not to mention she was a bit slower in a younger body, and Amy mostly kept pace with her.  The two of them were well aware of where Tails' workshop was, so getting there wasn't an issue, and soon enough they both came up to it.  Rouge went and knocked on the door before noticing it had a doorbell, which she pressed, several times.  Amy got out of the machine and stood by.  It wasn't long before the door opened, Tails was staring at the two of them, looking very surprised.

"There you are fox boy, we've got business with you."  Rouge told him.  

Tails looked at them both, noticing Amy, and said.  "Sonic's not here."  Which Amy was visibly saddened by.  

"We're not here for him!  We've got a problem."  Rouge snapped.  

"And you are?"  Tails asked, looking at the young bat, he certainly didn't recognize her.  

"Ugh.  It's me, Rouge."  Rouge said through gritted teeth, hating that she had to explain this.  

"What?  But the Rouge I know is.  Uh.  Older."  Tails said, quickly rethinking the word choice he would have used to describe Rouge.  

"Yeah, that's the problem."  Rouge told him as she pushed pash him and went inside, Amy following suit.  

"Why do you have Eggman's vehicle?!"  Tails asked as he noticed the machine floating nearby.  

"Not important."  Rouge told him.  "Now come here and I'll tell you what is important."  Rouge said as she sat herself on a couch, Amy followed suit, sitting next to her, Tails came in after shutting the door, looking towards the two of them, he immediately realized Amy wasn't wearing a diaper.

"Amy!  Ugh.  Wait a moment."  Tails told them as he flew off.  Both Rouge and Amy were slightly confused by that, but Amy seemed to understand the moment Tails came back with some diapers.  "I'm not going to have you stain the couch."  Tails said as he went over, Amy just shifted herself, laying flat on the couch and lifting her skirt and raising her legs.  Tails unfolded one of the diapers and laid it out under her, setting Amy's bottom onto it, he then taped it up, as well as dealing with the tail tape after Amy sat back up.  

"I assume you need one too then Rouge?"  Tails asked her, getting a rather angry look from Rouge in response.  

"I am NOT wearing a diaper!"  Rouge exclaimed.  

"Well then you aren't sitting on the couch."  Tails told her, matter of factly.  The two of them glared at each other until Rouge suddenly relented, standing up off of the couch.

"Fine, this isn't what matters!"  Rouge stood to the side and Tails sat on the couch as he addressed them both.  

"Okay, so what happened?"  

"Kay, short version.  Amy swallowed a Chaos Emerald and turned me into a kid."  Rouge told him.  

"Amy swallowed a Chaos Emerald?!"  Tails exclaimed, immediately lifting off of the couch and flying off away from Amy like she was an explosive device.  Which made Amy pout a little.  

Soon Tails landed and stood by Rouge.  "Alright, more details, I need to know everything."

Rouge sighed and began to take it from the top, after which Tails had some observations.

"Okay so.  Disregarding everything else, our main issue is that Amy has a Chaos Emerald inside her body.  This is, not good."  Tails told them.  

"How not good?"  Amy asked.  

"Well, me and Eggman have both used Chaos Emeralds for various machinery, so there is an understanding that it can be used as a power source, and we also know that if you have all of them together, you can used them to be virtually unstopable.  Having an Emerald inside your body, is like, having a reactor inside your body, except that this reactor isn't controlled by anything like circuitry, but rather Amy's possible thoughts and emotions."  Tails said.  

"Okay, but what does that mean?"  Rouge asked.  

"Well, from what I can gather, when the Emerald reacted inside of Amy, it was responding to you threatening her, I doubt Amy conciously used it to make you younger, so it must have happened subconciously, the Emerald acted on Amy's desire to put you into a position where you were less likely to hurt her."  Tails said, but continued before Rouge or Amy could say anything.  "Although, it is also possible that the Emerald didn't react to that, but rather Amy just so happened to need to pass gas at that moment, and seeking to release some power, the Emerald used that opportunity to turn Amy's gas into a weapon of sorts, one that just so happened to reduce your age.  Possibly even a little of both."  

"So we just need to make her fart?"  Rouge asked.

"NO!  No, we must not make her fart, in fact, Amy needs to not break wind at all, or defecate for that matter.  Anything that exits her body could very well end up causing who knows what to happen!  I'll need to run some tests, but for the time being, messing with this could just make things worse, I have no idea if we'll be able to turn you back to normal Rouge."  Tails added.  

"Uh..  Guys, how do I not fart?"  Amy asked, genuinely concerned.  

"Right..  She's not toilet trained, and a plug will only do so much, and that's if it would even stop flatulence powered by a Chaos Emerald in the first place."  Tails mused.  "Here, let me go get something."  Tails said as he left the two of them alone again, flying off.    

Amy and Rouge sort of just waited there for Tails to return, both of them wondering what he could be getting.  Rouge was standing there when that dull pain in her gut seemed to suddenly bloom into a desperate feeling of pressure that was building uncontrollably.  The bat suddenly bent over as the feeling caught her completely off guard.

"Wh-what the hell?!"  Rouge exclaimed as a sudden feeling began to course through her abdomen, gaining steam until Rouge felt a bubble of pressure release in the form of a loud 'Prrblbrt' that put a foul odor into the air and a blush on her face.  

Amy giggled at the sound of it, looking at Rouge, she could see that bat's face had contorted slightly, the blush occupying Rouge's face was quickly spreading all over.  "Ooh..  Someone has to poopy!"  

Rouge was feeling a mixture of emotions, rage, desperation, fear.  The feeling inside of her had quickly reached that point where she felt like she needed to relieve herself ages ago, but only just now.  Was she really this oblivious at this age?

"Amy!  Wh-where's the bathroom?  I need it NOW!"  Rouge asked her.  

Amy just tiled her head quizzically and pointed at the diaper under her skirt.  "I don't think I've ever used the bathroom here before."  

Rouge began desperately looking around for a place to relieve herself, unable to face Tails after denying the diaper if she were to have an accident here and now!  Not knowing where to go, she knew anywhere was better than here, and began flapping her wings to take off.  Only her wings didn't lift her into the air, they frantically fluttered behind her back, but she didn't leave the ground.  Rather a sudden feeling of euphoria rushed up her spine as a feeling in her backside became rather apparent as a sudden thick mass emerged from her rear.

"Hah!"  Rouge couldn't help but make a slight noise at the feeling of it snaking out of her.  It came in one seemingly unbroken cord, she could feel it pushing out of her butt, the sheer wieght of it as it tugged downwards, until gravity inevitably kicked in, snapping it off as it fell with a slight thud on the floor behind her feet, thankfully underneath her large baggy shirt.  Though she wasn't out of the woods yet, despite her best efforts to stem the tide, it just kept coming, until she was certain that this was more shit than she should have been capable of producing.  The foul odor of her pile wafted up through her shirt, she could smell it intensely as it came up the front, a miasma of sulfurous shit quickly surrounded her and Amy even covered her nose.  

By the time Rouge was finished, sighing heavily as her legs began to feel weak, Tails returned holding some sort of gadget.  Of course he immediately smelt what had happened.  

"Goodness Amy!  That's vile!"  Tails exclaimed as he fanned the air in front of his face.  Only to then see Amy shake her head, and point a finger towards Rouge.  Tails eyes followed it, seeing Rouge's face, slightly reddened, a look on her face that was a mixture of discomfort and relaxation, a stiff looking stance and eyes that were clearly not focused on anything.

He knew all those signs and more from the various diapered girls he knew, Cream was notoriuous for such faces after all.  Without any word he moved towards Rouge, grabbing her shirt and lifting it, finding the large pile of shit beneath her, seeing the brown stains on the bats bottom.  Sighing heavily to himself, he dropped her shirt.  "Well, at least it wasn't on the couch.."