[b]This is the first attempt at recreating what was the first chapter of Axel's Sonic expansion series. The thumbnail is from Roga14 who you can find on dA and Twitter. It isn't an exact copy, but Axel helped me put it all together so hopefully it's a faithful representation. By the way, there is actually MORE artwork available on Axel's dA page, or you can hunt down Roga's page. Either way, leave some feedback!
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Blaze the Cat was looking forward to spending some time in the dimension of Sonic the Hedgehog. Not only was it nice to get away from the burden of being the guardian of the Sol Emeralds, but many of her close friends resided here, including Cream the Rabbit, whom she hadn't seen in such a long time. Over the years that she'd been gone, Blaze had grown to become quite the beautiful young lady. She still had no breasts to speak of, something that privately irked her to no end, but to make up for it, she had a delightfully large rear end that stretched out her pants and left nothing to the imagination, like she had a pair of grapefruit attached to her butt.

She was proud of it to be sure, but she couldn't help but wish her puberty had granted her the one thing she'd always craved: a bountiful bosom. For now, however, she was content to just relax and enjoy the time she had for her vacation, taking in the city atmosphere that was so lacking in her kingdom. Then she bumped into someone, and she landed on her padded rear end with an "oof" as she looked to see who she'd knocked over. "I'm so sorry, are you alright?"

"Ooow!" The woman Blaze bumped into whined as she looked up to see who it was that had knocked her down. This young woman was none other than Amy Rose, the pink hedgehog who greatly loved Sonic with all her heart. As Amy looked up, she realized who it was who just bumped into her, and her eyes lit up with joy. "Oh! Blaze! Good to see you again!" She said with her signature cheerful attitude. She managed to lift herself back up with a bit of bounce in her step, most of that bounce coming from her chest. It seemed to taunt Blaze about her flat chest even further. Clearly, puberty decided to give Amy all that Blaze lacked in the upper body department. Amy's boobs were a pair of round and perky L-cups that wobbled shamelessly with every move she made. "Man, it's been so long!" She held out a hand for Blaze to shake. "How've you been?"

Blaze stared slackjawed at the pink hedgehog, whose boobs seemed to be several sizes too big for the dress she was wearing. Her breasts were absolutely enormous. Nearly as big as her whole head, and a conflicting sense of envy and admiration flooded the cat girl's spirit. "I-I'm fine." Blaze took Amy's hand and pulled herself up, her butt wobbling a bit as she regained her balance. "It has been a long time...a very long time, apparently."

"Yeah, it has! A lot has changed since the last time we met." She giggled as she helped Blaze up, unaware of just how her statement could be applied to her. "So what brings you here? Another adventure to find your lost emeralds? Or just a vacation?"

"Um, no, just here on sabbatical. Wanted to see my friends again, like you." Blaze smiled briefly, but was unable to actually tear her eyes away from Amy's massive mammaries. "Forgive me for being so forward Amy...but...how...how did you, I mean, your chest..." Blaze spread her arms out wide to illustrate her point.

The pink hedgehog just put her hands on her hips and gave soft chuckle. One would think that being asked about their boobs would be embarrassing, especially when discussing it in public. But for Amy, it was just another Tuesday for her. "Yeah, I had a feeling you'd bring that up." She said casually, pushing her breasts up slightly with her forearms. "Honestly, I can't really say much about how they got this big. They just...did." She shrugged as she let her boobs bounce back to their original place. "I can only find bras that fit them at this one place Cream introduced me to not too long ago."

"I see. So there was no...secret? No special exercise? No diet? Nothing?"

"Weeell..." Amy tapped her chin as she pondered the thought of other possible causes for her incredible growth. "Now that you mention it, Cream did once tell me about her dieting and exercising routines. But they were mostly focused on her butt rather than her boobs." She sighed softly as a hand subconsciously wandered to her rear to give her cheek a firm squeeze beneath her skirt. "I've tried them before, but it didn't help make mine any bigger than it is now..." The disappointment in her voice was easy to hear. Truth is, she had hoped for a more generously sized butt than what she currently had. Not to say she'd prefer a big butt over the big boobs she had now. She actually enjoyed being so busty. She just wished she had more junk in the trunk to balance out her pack in the rack and give her that perfect hourglass figure.

"So you're saying, you would have preferred if you had grown more in your bottom half rather than your top half?" Blaze unconsciously placed her hands on her own firmly packed rear. "What a cruel twist of fate. What you lack, I have in abundance, and vice versa."

"Wait, seriously? You're telling me you got a..." Amy trailed off, eyes darting down to Blaze's lower half. She couldn't see Blaze's butt from the front, but just by looking at the width of her hips and plumpness of her thighs, Amy could tell Blaze was indeed packing one hell of a caboose. "Can you show me?" Amy asked, perhaps too casually.

"S-Show you?" Blaze blushed, her spine going straight from the inquiry.

Amy was about to answer back, until the realization struck her that she was out in public. "Umm...well, okay. Maybe not here. Let's go back to my place and discuss this. It's pretty close by." She grabbed Blaze's hand and began guiding the apparently bottom heavy princess back to her home. This gave Blaze a good enough look at Amy's butt to compare sizes on the go.

Blaze was honestly too stunned to protest being dragged along like this, her mind still processing just how casually Amy requested to take a full on look at her assets. Was this something normal for her? Judging by the looks she and Amy both were getting from passersby, it seemed that was a real possibility. It was as if she could feel the eyes of everyone walking past, all staring at either her ass, Amy's breasts, or both at once. Her sensitive hearing even caught the hushed whispers of two young men wondering if maybe they were dreaming...because such beauty couldn't be real. 

Again Blaze blushed, the idea of her being beautiful never really occurred to her, not with such a flat chest that is. Sure her butt was huge, but for her it just seemed normal. Was that what it was like for Amy? Having boobs that bobbed up and down like buoys in the water and so big that she likely couldn't see past them? Truly, a cruel irony. Amy's butt was not necessarily small per say, it was...average, for a normal Mobian. But for someone like her? It most certainly was small. As soon as they reached Amy's house, Blaze was rushed into the living room and watched as the room went dark once Amy closed all the drapes to ensure no one would see a thing. "What are you doing?"

"Just making sure there's no peeping-Toms." She turned the lights on in the room so they could see better. Then she turned to face Blaze, still speaking in her casual tone. "Okay. Now back to where we left off, I wanna see how big your butt is compared to mine."

Blaze gulped, she could see that Amy wasn't going to take no for an answer, and if she knew Amy at all, it was that she had a wicked temper when tested. Besides...what was the harm? Surely there was nothing wrong with simply allowing her to get a proper view of her butt? This was something she'd heard women did with each other...albeit ever-so-slightly younger than she was now, but it wasn't unheard of. "Very well..." Blaze turned around, turning her back - and butt - to the pink hedgehog. "There."

Amy's jaw dropped at what she saw. Blaze's butt was near perfection. Each cheek protruded out like a shelf, and were perfectly round. Her ass was so tightly packed in her white tight pants that they were almost sheer. If Amy's boobs were comparable to watermelons, the same could clearly be said about Blaze's ass. "Whoooah! Your butt looks amazing!" The astonished Amy reached out to get a gentle feel for Blaze's burgeoning backside.

And instantly, Blaze's tail went straight as she blushed beet red once she felt Amy's hands on her rear end. She hadn't expected Amy to be so forward, but then maybe she should have...and now she was concerned. "What are you doing?!"

"What?" Amy seemed like she didn't even realize what she was doing until Blaze interjected. Suddenly, Amy snapped out of it and retracted her hand. "Oh! Sorry about that... I guess I've gotten a little too used to touching and talking about butts thanks to Cream." She chuckled embarrassingly.

"You keep mentioning Cream." Blaze turned around and sat on Amy's couch, the springs underneath creaking from the sudden weight being pressed down on it. "How is she? Have you kept in touch with her? I've been worried about her, she was just starting to grow up the last time we saw each other."

Amy sat down beside Blaze, her boobs wobbling alluringly from the impact. "Oh yeah, Cream's been doing well. And she's certainly grown up." Amy paused before leaning towards Blaze and changing her tone to add more emphasis to what she was about to say. "And that's putting it mildly!"

"Is that so?" Blaze raised an eyebrow. "Is she as...blessed as you are?"

"Well, not so much in the boob department. I've got her beat there." She giggled cutely and shimmied her chest, making her boobs wobble side to side. "But when it comes to her butt...well, you know yours is pretty big right? Cream's is like...double your butt's size!"

Blaze's eyes widened as the mental picture came to her. Sweet, adorable, innocent little Cream...was rocking a butt that made hers look tiny in comparison? It seemed impossible, considering how Blaze best remembered the rabbit girl from her last visit. "How does she feel about that? About...being both smaller and bigger, that is."

"Oh, she absolutely loves it!" Amy giggled jovially. "Every time I visit her, the first thing that comes out of her mouth is 'Amy look! Look how much bigger my butt is!' Or sometimes it's her boobs. Whichever just happens to get a bigger growth spurt."

"So she's still growing then. I guess as long as she's happy, I'll be happy for her." Blaze leaned back and sighed, her eyes closing for the briefest of moments as she pictured herself with the body she always wanted. "I envy you, Amy." She said quietly. "Can I tell you a secret?"

Amy furrowed her brow curiously. She already could tell what was on Blaze's mind, just based off of what they were just talking about. She scooted closer to Blaze, giving her full attention."Sure, Blaze. Go right ahead."

Blaze exhaled through her nose, heart pounding in her chest from the admission she was about to make. "I...I've always been insecure about my chest size. Even when we were much younger I was always jealous, even of you. You were just a kid, younger than me, and yet even your breasts were larger than mine. Seeing you now..." She shook her head and looked up at the ceiling. "You're so lucky to be as big as you are. I'd give anything to grow to your size, or even close to it."

"Hmm...yeah, that's what I figured." Amy nonchalantly leaned back in the couch, letting her boobs bounce for a moment. "I could tell by how much you were staring at them. But I don't mind. I've gotten used to the attention they give me." She sighed as her own need to get something off her bountiful chest came to her mind as well. "And while we're sharing secrets, I've always wanted to make my butt bigger too. Seeing Cream so happy and hyperfixated on her own butt's growth made me wanna grow mine out too." She rubbed a hand on her own butt, feeling how inadequate it was compared to her heaving chest. "Don't get me wrong, I love my boobs. I just wish I had an ass to match it. You know, to have that perfect hourglass figure men go wild for. And maybe then..." She trailed off and blushed. "Maybe I'll finally get Sonic's attention..."

Blaze turned to look at her with a sympathetic expression. "You still love him don't you?"

"Mhmm." Amy nodded. "The whole reason I've tried making myself sexier is to get him to notice me more." She gently lifted her boobs up and slowly wobbled them.

"Only for him? Not for yourself?"

"Well, at first it was only for him. But after a while, I started to enjoy having big assets like these!" She playfully jiggled her boobs harder and giggled. "The way they look, the way they bounce, the way they feel. It's all so amazing!" She played with her boobs absentmindedly right next to her less than buxom friend. Until suddenly she stopped, realizing how awkward this must look for her. "S-Sorry. Got a little carried away..."

"It's fine." Blaze relinquished a tiny smile. "I would do the same in your position...in private, anyway."

"Right." Amy got up from her seat. "Anyway, I'm not giving up on my quest for the perfect booty! And I won't rest until I've got some nice junk in the trunk like you!" She winked at Blaze, and offered a hand to help stand her up. "And I know you'll one day have the tits of your dreams someday!"

Blaze couldn't help but smile, Amy's infectious enthusiasm chasing away the gloomy atmosphere. She took her hand and stood back up, looking Amy in the eyes rather than the chest for once. "Your optimism is refreshing, thank you Amy. Although I'm not sure there's a way for either of us to get any bigger at this point. How would we do it?"
"Who knows? There could be tons of methods we just haven't tried out yet. Some new exercise routine, some scientific chemicals, beating up some buxom superpowered babe and absorbing their powers." Amy chuckled with that last one. "Haha, okay that last one was a joke. But hey, the others could be true. Maybe Tails has something that could help."

"Tails? Do you really think so?"

"Maybe?" Amy shrugged. "Wouldn't hurt to ask a genius, right?"

"I suppose not!"

"Alright. I'll go ahead and give him a call. Don't move that cute booty anywhere till I get back!" Amy giggled and walked off in a hurry to get her phone.

Blaze simply blushed and sat back down on the couch. "Oh don't worry..." She said to herself. "I wouldn't miss this for the world."

Meanwhile, Miles "Tails" Prower was beginning the final test on his prototype size alteration ray. Now a full grown adult, Tails had grown up to be tall and strong, a handsome gentleman that girls would fall over themselves for. But he never lost his heart of gold, the gentle spirit that made him who he was. Admittedly, he was surprised by how he was inspired to create this particular invention of his. A call from Cream's mother Vanilla over a year ago had sent him down this path. She made the suggestion of how beneficial a size ray would be to the betterment of society. Ending world hunger, for one. He never would have considered the idea himself, but he readily agreed once it was brought up to him...part of him hoped that Vanilla - and by association, Cream - would be impressed with his work...impressed enough to maybe...

"Don't think about that now." Tails shook his head and replaced the goggles on his head, aiming the ray at a potted flower in full bloom. "Prototype Size Ray, test number 146...please work this time." Tails fired, and a green beam shot out of the gun, striking the plant and enveloping in its glow...after several moments, the flower spurted larger. "Did...did it..." The flower grew again, and again, and again. "It works! It really works! Yes I did it!" Tails finally stopped firing, and he noticed that the flower continued to grow even after the ray wasn't hitting it anymore. "Lingering effects I see, but nothing else that I can tell! It's a success at last!" Just as the flower was ready to burst out of the pot, it finally slowed and stopped growing. "Amazing! Cream...I mean Miss Vanilla will be so impressed!" Then the phone started to ring, and Tails picked up the small device and answered it without even checking who it was, so enthralled in his victory. "Hello?"

"Hello, Tails." Amy's voice came out, clearly sounding eager over something. "Are you working on anything at the moment? I kinda have a favor to ask."

"As a matter of fact I am!" Tails grinned eagerly. "After over a year of research and development, I finally completed my prototype size ray!" Then Tails blinked as his mind registered the other half of that statement. "Wait, favor? What favor?"

Amy smiled at the mention of a size ray. A beacon of hope for sure she thought. "That's great! So like, Blaze is in town, and we were wondering if you could help us...umm..." Amy trailed off trying to think of how to explain this. "Okay, how do I put this...?" She asked herself as she held the phone away from her face. After a few seconds of thinking however, she just shrugged and picked up where she left off. "Could you help Blaze and I grow bigger assets?"

The sound of a clatter was all that could be heard as Tails' brain short-circuited and dropped the phone.

"T-Tails? Is everything alright?"

Moments later, Tails picked the phone back up, his mouth dry as he brought it to his ear. "I'm sorry, you mind repeating that?"

"I said...Blaze and I wanted to know if you'd be willing to help us make our assets bigger." she said as clearly and concise as she could. "Blaze wants bigger boobs, and I want a bigger ass."

"I-I...I mean, theoretically yes, it is possible. But this is extremely unprecedented Amy!" Tails exclaimed through the phone. "This isn't the same as enlarging a house plant, we're talking real precision! I can't in good scientific conscience agree to do this!"

Amy sighed. So close, yet so far. Seemed like it was too good to be true after all. "No! I can't give up now!" Amy thought. "There's gotta be some way to convince him to give it a shot." She paced around in her room, and accidentally bumped her boobs into a picture frame on her dresser. When she picked it back up, she noticed the photo was of her and Cream. A devilish grin formed on Amy's face. "Say Tails. You wouldn't still happen to have the hots for Cream, would you?"

"C-Cream?!" Again the phone clattered to the floor, but he scrambled to pick it up. "What about her?"


"Bingo." Amy thought as she pumped her fist in victory. "Oh you know. She's just been her usual self for the most part. Taking care of Cheese and her mother, helping out others whenever she can, and...I'm not sure if you've noticed, but she's become something of an...'entertainer' online." Amy rambled a bit to tempt Tails further. "And did I mention...her body has gotten even curvier since last time we saw each other?"

"I know that!" Tails gulped suddenly. "That is, what I mean is, aw crap." Tails sighed. "Fine, I'm still in love with her. Happy?"

"Hehe. Not as happy as you'll be once I convince her to go out with you." Amy proposed with a tint of deviousness in her voice. She knew exactly what she was doing.

Tails froze, his face suddenly red with blush. "You...you'd really do that?"

"Of course! Remember, she and I hang out every other weekend. I'd definitely be able to arrange that for you....on one condition..." Amy smirked.

Tails groaned into the phone and slumped his shoulders. "Deal."

"OOH, I knew I could count on you! Blaze and I will be over as soon as possible!" Amy hung up her phone before Tails even had a chance to respond, and quickly made her way to Blaze. "Okay Blaze! Time to get our butts over to Tails to make 'em bigger!"

"He said yes?!" Blaze leaped to her feet, heart racing with excitement uncharacteristic of her. "There's no time to lose! Lead the way!"

"Right!" And with just as much excitement, Amy led Blaze out of her house and towards Tails's workshop. Sometime later, they arrived. Amy was a bit out of breath due to running almost the whole way there, not helped by her bountiful breasts bouncing all over the place. But they managed to arrive with no major issues. "Hah...finally here." Amy panted. "Let's get this started!" She knocked on his door, and after a moment, the door made a buzz sound and opened on its own. "Oh. I guess we can just walk in." She and Blaze shrugged and entered the building. "Tails! We're here!" Amy called out once inside.

Another door opened, and Tails came walking in, the ray gun in his hand and his head bowed. "You better not be messing with me Amy, I don't think I could handle that."

"I'm not messing with you, Tails. I would never lie about something like this!" Amy smiled sweetly. "You have my word!"

"Alright then. Stand over there, both of you."

"Okay." Amy did as she was told, standing beside Blaze. She looked over to her feline friend and patted her back softly. "You ready to have your dream bust, Blaze?"

"Yes. Yes I am." Blaze spread her arms out wide. "Thank you in advance Tails!"

"Well..." Tails raised the ray gun. "You're welcome I guess."

As the raygun was fired at her, Amy felt a strange tingle course through her ass cheeks. It felt like her butt was vibrating. "Ooooh! T-This...feeling..." Amy moaned softly before looking behind herself to see if it was working as she hoped. And what she saw made her eyes bug out in shock. "M-MY BUTT! IT'S GROWING!" She screamed in excitement as she watched her ass balloon up before her very eyes. What was once a normal sized booty that lacked any real meat to it was puffing up into a ripe, round ass comparable to melons. And it kept growing at a steady rate.

Blaze was having similar, slightly more subdued reactions as she refrained from screaming. But her excitement was just as palpable. "My breasts! Finally! It's better than I could have dreamed!" The lavender cat watched in awe as her once flat chest steadily swelled through cup sizes, passing B-cups, C-cups, D-cups and with no signs of stopping. "Oh yes, keep growing. Get bigger."

As for Tails, he was beyond stunned. He hadn't expected the sudden...rush to flow through him, his finger seemed stuck on the trigger as he kept firing, causing the girls to grow ever larger. "This...is...awesome..." He whispered to himself as his nose started to bleed.

Bigger and bigger, Amy's ass swelled, causing her skirt to ride up further and further to reveal her plump pink cheeks. Her panties getting so tight, that they wedged between them. Normally this would be very uncomfortable. But what they didn't expect was for the growth to give them a surprising wave of arousal as they grew, enough to make them not even worry about the predicament of their clothes. "Ooooh yeah! J-Just...a little more!" Amy cooed as she rubbed her ballooning bottom. "Sooo big!" Amy stood there panting as the growth slowed down before stopping just before her ass could rip apart her panties. "Ooooh wow! I...I didn't expect it to....feel so good!" She moaned while giving her newly inflated butt a good squeeze. "Mmm, I think I'm as big as you now, Blaze!"

Blaze was in a similar daze, her tongue lolling out in an undignified manner as the sensation of growth slowly faded away, leaving her equal to Amy's own L-cup bosom. "You're right, that was amazing. And I think we really do match, on both ends!" Blaze bounced her new boobs and practically giggled, the sheer joy overriding her usual sense of decorum. "They're so big they're practically going to make my vest explode!"

"I'm surprised they didn't honestly." Amy giggled as she joined in on Blaze's playful bouncing, but with her ass rather than her boobs. "Hehe, now that I've got a big booty, I can finally see why Cream loves shaking hers so much! This is great!" Amy kept wiggling her hips, making her ass jiggle and bounce alongside Blaze's tits.

Tails didn't dare make a sound, just watching the two girls giggle and bounce their newly grown assets around like they were playthings. This was something out of a dream, or an erotic movie of some kind...not that he would know, of course...there was only one erotic thing he'd ever watched before. The thought of that something gave him his voice back as he cleared his throat and got their attention. "Well, ladies, now that I've fulfilled my end of the bargain, I think it's time you do the same."

Blaze stopped moving, her breasts doing the same a few moments later due to their bounciness, and she smiled and nodded at the fox boy. "You're right Tails, thank you. You've made both our dreams come true." She grinned deviously. "In fact...Amy, I think he deserves a little extra reward, don't you think?"

Amy smirked deviously. "You read my mind." She began walking towards Tails with a seductive sway in her hips with each step, which had also grown wider to accommodate her newly grown rear. Her thighs even became thicker as well, giving her exactly what she always wanted. The perfect hourglass figure. "You like what you see, fox boy?" Amy teased as she turned around and bent over, flaunting her massive ass to his face. "Look at what you helped create."

"I...uh..."

Then Blaze came up behind him, and Tails gasped in so much air through his mouth he squeaked as an incredibly ample bosom squished into his back and a pair of arms wrapped around his neck, turning him into a sandwich as both sexy ends of the female anatomy were suddenly on him at once. "You fulfilled my dream and eliminated a lifelong insecurity of mine, you deserve to enjoy yourself."

He couldn't move, even moving his arms back only made his elbows dig into Blaze's chest, making him even more panicked as his nose bled again. "I-I-I c-can't, I don't, please!"

"Aww, he doesn't want to play." Blaze pouted. "Well, I guess we're just not enough woman for him Amy. Better give him what he really wants."

"Yeah. Let's give the real booty queen a call." Amy took out her phone and began dialing up Cream. Even when she wasn't fully herself, she at least was still a woman of her word. Even with her big ass pressed against Tails's body.
"Y-You're actually doing it!" Tails was distracted from his predicament for a moment when he heard Amy talking to Cream over the phone, and that brief moment was enough to get him to loosen up and actually enjoy himself. "This is the best day of my life!"

Amy giggled hearing Tails's response just before Cream answered the phone. "Hey Cream. Yeah, I'm good. Say, you're not busy today, are you? ... Good. In that case, you wanna meet up with Tails today? He's got a biiiig surprise for you." Suddenly, a loud excited voice came through the phone, causing Amy to recoil back a bit before resuming. "Y-Yeah. He'll be over soon. Okay. Alright, have fun!" She hung up and straightened herself back up to face Tails. "Well, you better not keep the lucky gal waiting!" She said as she pat Tails's head. "And...you'd better bring your growth ray with you. She's gonna loooove it!"

Tails blushed so red he looked more like Knuckles, excitement building at the thought of using the ray on his crush. "I will! Thank you, thank you so much!" And without even a moment's hesitation, Tails bolted out the door as fast as his tails could carry him...only to return moments later. "Shower first! Then Cream!" And with that he slammed the door to his bathroom, with the sound of running water following it.

"Well," Blaze smiled. "Looks like we all got what we want today." She said as she cupped her bosom. "I for one am looking forward to enjoying these."

"Yeah. And I'm looking forward to enjoying this too." She turned to face her ass towards Blaze, and smacked it hard, making it wobble. "Hmm. Maybe I'll learn how to twerk too, like Cream." She said with a playful wiggle in her hips.

"Whatever you decide, I wish you luck."

Then Tails burst out of the door, looking fresh and clean and tails fluffed up. "Okay, now I'm ready! Thank you again!" And with that, the fox boy burst out of his lab, ray gun in hand, his heart pounding out of his chest as he flew towards her house. "I'm coming for you Cream! Wooooooohooooooo!"