Sonic and Knuckles star in…
“The Hedgehog Strikes Back” featuring Tails
(4k words)


—
        Sonic smiled as he opened the door to Tails’ workshop, always happy to see the fox bent over his workbench excitedly developing and testing some new invention. The sun was only just rising up over the horizon, and there was no telling how long the fox had been awake. As usual, Tails was too engrossed in his work to notice that the hedgehog had even entered. Sonic hardly minded, considering how much he enjoyed the view as of late.
        Though Sonic had spent a long time trying to deny it, Tails had always had a cute butt. With the addition of a thick blue diaper (picked in order to match Sonic’s quills) peeking out over the top of his waistband, his simple black shorts were stretched nearly to their breaking point. The material had been stretched to such an extent that even if the waistband wasn’t visible, Sonic wouldn’t have had any trouble determining the color of the padding.
Sonic supposed that he would need to take the fox shopping for new clothes if he intended on ever wearing diapers in public, which he had been slowly but surely attempting to talk him into, but for now he was just fine with Tails’ wardrobe. If anything, the hedgehog was jealous. While his own loose-fitting shorts definitely managed to cover up his own bright yellow diaper, there was something alluring about the idea of being so exposed. 
        He slowly walked up behind the fox, leaning forward over his shoulder and kissing him on the cheek while sliding his right hand around Tails’ waist and down into the front of his shorts. Unfortunately, the fox was much better than Sonic at keeping his padding clean overnight. 
        “What a shame,” Sonic sighed, rolling his eyes dramatically. “Still feels pretty dry to me!” Tails jumped at the surprise at first, but instead of responding, he let out a small moan as he relaxed his muscles. It was followed by a gentle hissing noise as Sonic felt the fox’s diaper growing warmer, with the padding swelling slightly and pushing back against the pressure of his hand. As he looked down, he could once again see through the shorts that Tails’ diaper was turning slightly green.
        “Mmm, that’s more like it,” he whispered into Tails’ ear, squeezing the wet padding hard enough to feel the fox’s cock beginning to stir. Tails chuckled, batting the hedgehog’s hand away as he turned back to the pair of devices on the bench in front of him. Not to be deterred, the hedgehog pulled Tails closer, returning one hand to his diaper while slipping the other up under his shirt in order to rub the fox’s belly.
        “Do you want me to finish these or not? This whole thing was your idea,” Tails sighed in exasperation as he resumed making a few final tweaks and adjustments. Sonic kissed the fox’s neck, before finally managing to pull himself away.
        “I know, I know. Just not used to seeing you all padded up yet,” Sonic smirked, avoiding another swat from Tails as he patted the fox’s rump. “So this thing is really gonna let me switch bodies with Knuckles?”
        “Yup!” the fox replied happily. “I invited him over later today. I’ve just gotta slip this headband onto him, activate them both, and then you can use his phone to finally take that video down!” Sonic looked down at his feet, clearly mulling something over.
        “I know that was the plan, but…”
        “But what?” Tails interjected, standing on his tiptoes in order to kiss Sonic on the forehead. “I hope you didn’t have me spend all of this time working for nothing!”
        “No, of course not,” Sonic reassured him, hands firmly placed on the fox’s hips. “I just meant that if we’re going to all of this trouble, we could do more than delete one embarrassing video!”
        “Absolutely not, Sonic!” Tails chastised his boyfriend, swatting away his hands once more and turning back to his workbench. “It was a mean thing he did to you, but if you do anything to take revenge it’s just gonna escalate!”
“I know,” Sonic sighed, looking back down at his feet. “It’s just that I can’t go anywhere without people laughing. But you’re right, I don’t wanna risk him doing anything worse.” Always happy to hear Sonic admit he’s wrong, Tails wiggled his diapered butt against Sonic’s diapered crotch, enjoying the sound of the pair crinkling together. 
“So,” the hedgehog continued, pulling Tails even closer towards himself, his nether regions beginning to stir due to the stimulation. “What time is Knuckles getting here?”


Two Hours Later… 


“I’m coming!” Tails shouted, holding the headband behind his back as he made his way to the front door. The other device was already snugly attached to Sonic’s head, and the hedgehog himself was securely tied to a chair to ensure that Knuckles didn’t try anything while Sonic deleted the video. Sonic had resisted at first, but after considering what might happen if Knuckles ran amok in his body, he quickly capitulated. That wasn’t something that he wanted anyone else to see. Not that the entire internet hadn’t seen quite a bit of him already.
Tails had removed the hedgehog’s shorts, first, pulling them on over his own in order to conceal his diaper. Considering the fact that Knuckles was the reason he’d been forced to start wearing them in the first place, he didn’t want to give the echidna the satisfaction of knowing he’d won. Though Tails did find himself enjoying diapers, especially with Sonic, it was the principle of the thing.
“Hello, Knuckles,” the fox chirped happily, opening the door with a smile on his face and coming face to face with Knuckles. His… acquaintance was wearing a variation of the same thing he always wore, a dark gray tank top with black shorts, accompanied by his chunky sneakers.
“Hey, Tails,” the echidna replied, slightly taken aback by the fox’s overly sunny attitude. After all of that stuff with Sonic, he hadn’t been the most popular among the friend group lately. “What did you want to show me again?” He made his way over to the living room, with Tails closing the door behind him.
“Just a new invention,” the fox replied with a smirk, his twin tails whirling behind him in anticipation . “Here, try it on!” Before Knuckles had a chance to react, Tails dashed over, placed the headband onto Knuckles’ head.
“Shit,” Knuckles gasped, forgetting just how fast the little yellow fox could move when he put his mind to it. “What’s the rush for? You nearly gave me a heart attack there!” He reached one of his hands up and felt the headband.
“Now what does this thing do?” he asked, turning around to face his friend, only to see him holding up some sort of remote. 
“Nothing much,” Tails grinned as he pressed a glowing green button and pointed the device at Knuckles’ head. .
“What do you mean by tha-” Knuckles stopped mid-sentence, his entire body freezing for a moment before the echidna collapsed backward onto the couch, exactly as planned. He was only down for a moment before he sat back up, rubbing his head as he turned to look at Tails.
“How are you feeling?” Tails asked, taking a cautious step back while crossing his fingers that his device was actually functional. He wasn’t looking forward to the ensuing conversation if it hadn’t done anything besides give the echidna a headache.
“What the hell was that thing?” Knuckles replied, continuing to rub his head as he stood back up and walked over to Tails, backing the yellow fox into the corner. He was a decent amount taller than the fox, definitely enough to intimidate him. 
“Oh…well, you see, it was an… umm, it was just something that I designed in order to…” Tails’ frantic search for an explanation trailed off as Knuckles took another step forward, and the fox stood there in silence as the echidna closed the gap and pulled him into a kiss, holding his cheek with one hand while reaching the other down to grope his diaper. 
“Damn it, Sonic!” Tails groaned in exasperation, breaking the kiss and lightly shoving the echidna in the chest. “I thought I was gonna have a heart attack!” Sonic chuckled, leaning back in for another quick kiss on the cheek. 
“Sorry, Tails, but I couldn’t miss out on a golden opportunity like that!” Tails crossed his arms in a huff, refusing to make eye contact with his boyfriend for a moment, until the corners of his frown twitched and he broke out into laughter himself.
“Fine, I forgive you,” he said, giving the echidna a hug. “Never thought I’d end up kissing Knuckles, though. It felt weird.” Sonic looked down at his borrowed body, a devilish smirk spreading across his face. 
“So you don’t like this?!” he grinned, pulling down both pairs of shorts Tails was wearing before turning around and pulling down his own, twerking against the flustered fox’s diapered crotch. Tails blushed furiously, once again turning his back to Sonic.
“Just delete the video already so we can pretend this never happened,” he said with a huff, while his boyfriend was practically wheezing with laughter behind him.
“All right, all right,” Sonic said, pulling his shorts back up and taking Knuckles’ phone out of his pocket. “Good thing he uses fingerprint ID on this thing.” Walking over and sitting back down on the couch, he navigated around the device, locating the various platforms where his echidna “friend” had uploaded the compromising video, deleting each one of them in turn. 
Tails, who had walked over to the kitchen to get a glass of water, leaving his shorts behind on the floor, was just coming back over to the living room when Sonic stood up in shock.
“It was his fault!” Sonic exclaimed, completely aghast. Tails was puzzled at the reaction. Didn't they already know that Knuckles posted the video? That was the whole point of the plan.
“Yeah, which is why we did all this,” he voiced those thoughts aloud, walking over to his boyfriend who was completely transfixed by whatever had appeared on the screen. 
“No, not the video,” Sonic replied without looking up. “He was responsible for the accidents in the first place! Mine and yours!”
“What?” Tails asked, also shocked. “What are you talking about?”
“Look,” Sonic said, finally looking up from the phone as he pulled Tails closer. I thought I would check his messages quick, and I noticed an old conversation he was having with Shadow. They were talking about how they were sick of the two of us upstaging them!”
“Knuckles and Shadow? You can’t be serious,” Tails said, taking the phone to read the messages for himself. 
“It’s all there!” Sonic replied, still in disbelief. “Knuckles came up with the idea to put something in my chili dogs the night before my accident, knowing I would heat them up for breakfast before meeting him at the gym.”
“Leftover chili dogs for breakfast?” Tails looked at him quizzically. “Really?”
“That’s not the point,” Sonic sighed, running his hands through Knuckles’ quills. “He knew he would be able to capture my accident on film, and I think he assumed that if he put something in your food too, I might put it online in order to draw attention away from myself.”
“So we’d both be humiliated leaving him and Shadow to be the heroes!” Tails exclaimed, not even needing to finish reading the message history to know that he was right. Sonic nodded, sitting down on the couch, not sure what to do with the information.
“Sonic?”
“Yeah, Tails?”
“When you were talking about having other ideas for things to do after the body swap…” Tails trailed off, looking over at the hedgehog-turned-echidna.
“Yeah.”
“What did you have in mind?” Sonic’s confused expression turned into a devious grin, and he pulled the fox onto his lap for another kiss.


One Hour Later…


        “Knuckles” was walking down the busy street on the way to the gym where he and Sonic usually met up to train. Behind Sonic and Tails, he was one of the most well known heroes in the world, so he usually drew a fair number of eyes pretty much anywhere he went. On this day, however, he was drawing attention for a different reason than usual. 
        Instead of his usual plain tank top, of which he had the exact same style in a variety of solid colors, he wore a pastel number sporting the colors of the rainbow, cropped short enough to expose the Echidna’s belly. Usually tight and toned, his stomach was protruding slightly as the result of an extra-large breakfast he must have eaten recently.
        His shorts were also different from normal, with the echidna having traded out his usual athletic shorts for a pair that clung more tightly to his lower body, colored pale blue and speckled with fluffy clouds, the same pattern as the socks that poked out over the top of his usual sneakers. 
        While this outfit alone might have been enough to attract some extra attention, seeing as it didn’t mesh with the echidna’s usual public persona, it was also not the real reason why Knuckles was turning so many heads.
        The real reason for all of it was the undergarment that this unusual outfit clearly had not been intended to hide. Knuckles the Echidna was strolling downtown wearing a noisy, thick, babyish-patterned diaper, the exact same style as the one he had offered to Sonic on that fateful day. 
Indeed, his outfit could scarcely have been more revealing if it tried. The cropped tank top did nothing to conceal the waistband of the diaper that poked out over the top of his shorts, which were similarly revealing. The shorts had clearly been rolled over a few times at the top, exposing the upper portion of the diaper, and the legs were pulled down low enough to stretch out the fabric. The cloth had been pulled so tight over his massive padded ass that anyone who looked close, as many were currently doing, could see the colorful building block pattern.
 His diaper was so obviously on display that few passersby even noticed the echidna sucking noisily on a pacifier. Sonic, who was clearly still running the show, couldn’t be happier. He hardly even needed to make any recordings of his own, based on the dozen or so smartphone cameras that were already tracking his every step. Even when they switched back, Knuckles wouldn’t be able to delete any of those, now would he? 
He let out a grin, holding up his phone to find just the right angle to make sure that his face and diaper were both clearly visible before taking another picture. Not fully satisfied, he twisted his hips around in order to bring his padded ass into view before snapping another.
“Ooh, that’s profile pic quality,” Sonic smiled, searching through all of Knuckles’ social media accounts to make the update. He also texted the picture to Tails. 
Back in the house, the yellow fox opened the message with a grin. 
“Looking great, babe. Knock’em dead,” he muttered as he typed out his reply before setting his phone back down on the kitchen counter. “Not quite as good as that, though,” he said, looking across the room where “Sonic” was tied to a chair.
The hedgehog was firmly secured around the arms, chest, and legs, and Tails had made sure to cover his eyes with a blindfold and play him some music through noise-canceling headphones. In theory, he would have no idea what exactly happened at first. The fox had made sure of that, but he wasn’t in the mood to take chances. He was just as worried about the echidna’s potential retaliation as Sonic was. 
The main thing that drew Tails’ eye was Knuckles’ diaper. The fox was still wearing his boyfriend’s shorts from when he was using them to hide his own padding, and he didn’t really see a point in putting anything on Knuckles now. Every now and then, Knuckles would flex his arms and legs in an attempt to break free, but Tails knew he would be firmly secured in place until it was time to reverse the switch. 
He walked across the room, standing right in front of the hedgehog’s body, reaching one hand down to check his diaper. The fox was well aware of how much water Sonic had been drinking before, and he also knew that his boyfriend hadn’t taken his incontinence with his mind. So, just as expected, Knuckles’ diaper was already soaked. 
“Stop touching me, whoever you are!” Knuckles shouted, unable to do anything but sit there helplessly. It was still weird every time he heard his boyfriend’s voice shouting at him like this, but Tails didn’t really mind. The plan he and Sonic had made might be extreme, but so was the humiliation that the echidna had inflicted upon them both.  
“This is nothing compared to what your body is gonna do out there,” he chuckled with a glint in his eye, forgetting for a moment that Knuckles couldn’t hear him as he flashed back to those horrible memories collapsed on the floor. And the shower afterwards, he recalled with a shudder. “You brought this on yourself.”
        Back on the streets, Sonic was still having trouble getting used to how different Knuckles’ body felt as he walked around, and the large amount of food Tails had made him for breakfast certainly wasn’t helping. His stomach was uncomfortably full, but it was a necessary part of the plan, and he knew it would be worth it in the end. 
        Sonic let the pacifier fall from his mouth, revealing that it was attached to his shirt, and pulled a bottle of water out of his backpack. Well, a baby bottle filled with water, anyways. He took a nice, long drink, despite the fact that he was already feeling pressure in his bladder, before putting it back in the bag and popping the pacifier back into his mouth, bringing it to the attention of the crowd for the first time. It prompted a few small giggles from people who were out of the echidna’s eyeline, but he was happy to hear them.
        Only a block or so away from the gym, Sonic finally decided that it was time to wet, so he stopped in his tracks. Before he relaxed his bladder, he raised one leg in the air like a dog at a fire hydrant, letting out an exaggerated sigh as the piss started to flow into his diaper. The added moisture caused the front of his padding to swell up slightly, stretching the fabric of his shorts even thinner. One interested customer at the cafe he was relieving himself in front of could have sworn that he saw the wetness indicators fading through the paper-thin material.
        Sonic groaned, obviously and roughly squeezing his diaper until his cock stiffened and made a visible tent in the front of his padding. With that mission accomplished, he finally made his way to the gym. As he dropped his bag off in the locker room, his stomach started to grumble, but he made sure to hold in a fart until he was back out in front of the other people in the gym. 
        After a brief lap around the gym, he decided to warm up with some squats right in the middle of a room full of machines, surrounded on all sides by curious eyes. Another grumbling in his bowels caused him to wriggle in visible discomfort, but a noisy blast of the ass trumpet relieved enough pressure for him to start exercising. 
        The repetitive squats caused his shorts to be stretched even tighter over his diapered rear, and Sonic made sure to raise his little tail, ensuring that all of the people behind him had a clear view of his butt. After a quick glance behind him to make sure that some of his observers were recording, he started to grunt loudly, another fart escaping with each squat until the dam finally burst.
        Still sucking on his pacifier, Sonic squatted even deeper and started to pack a load of shit into the back of his diaper. Almost immediately, a large bulge started forming underneath his tail, growing larger until it fell to the bottom of the diaper. The first log was followed up by a second, then a third, quickly becoming far too big of a mess for his shorts, which ripped apart under the pressure, fully exposing his messy diaper seat to the public. The diaper in question did a decent job at holding in the smell, but the change in size as well as the color beginning to change from white to brown made it abundantly clear what he was doing, each squat forcing more shit into his padding.
        The pacifier fell out of his mouth once more, and Sonic began drooling onto his crop top. He hated to admit it, but he did love the feeling of packing a diaper to the brim, and the reality of being watched made his cock as hard as stone. Coupled with the fact that he was doing all of this in Knuckles’ body, meaning he wouldn’t be the one being judged for his actions, Sonic was in heaven. He ripped the remains of the pretty blue shorts free, tossing them to the side.
        With one more blast of gas, he finished emptying his bowels into the diaper. It was already reaching its maximum capacity, but considering how much he had eaten for breakfast, he was well aware that it wouldn’t be long before he needed to go once more.
        “You’re not getting off that easy,” he muttered to himself, trying to imagine how the echidna would react once he found out what his body had been made to do, smirking at the thought. “It’s not even lunchtime yet!”
        Sonic stood back up, admiring his loaded diaper in the mirror, striking a few poses as smartphone cameras flashed in the background. Despite the short time since breakfast, after such a big load he already found himself thinking ahead to lunch. His musings were interrupted by Knuckles’ phone ringing with a call from Tails, which he answered as he stepped out into the hall.
        “How’s it going, Sonic?” the yellow fox asked him anxiously, watching as Knuckles tried in vain once again to break free of his bonds back at home. 
        “Thanks to that breakfast you made for me, I already burst out of my shorts!” Sonic replied with a laugh, reaching down and squeezing his mushy diaper. “I was just in the middle of thinking of ideas for lunch. How are things going with…Sonic,” he asked, looking around to see if he was being overheard. Tails was silent for a moment, and Sonic could hear the sounds of his own body’s resistance from the other side of the line.
        He was just starting to consider using one of his inventions to further secure or sedate the hedgehog when his captive gave up once more, his entire body relaxing as a gentle hissing noise filled the room.
        “Damn it, not again,” Knuckles groaned, wetting himself for what seemed like the hundredth time in the last hour.




        “Someone’s diaper is starting to leak,” Tails giggled. “Maybe you should pick up some paper towels on your way back from the gym.” Sonic chuckled at the mental image.
“Anyways,” the fox continued. “Remember how long Knuckles spent in the bathroom after we all went to Taco Bell last April?” 
        “Perfect!” Sonic said, already pulling up the map to find the nearest location. “I’ll head over as soon as I finish this set of squats.” He smiled once more, ended the call, and stepped back into the crowded room. This was going to be a wonderful day.