This is a story based of the plot and characters from the game Mario & Luigi: Bowser's Inside Story for the DS (and 3DS in the near future :D), it's about a different outcome during the famous Bowser's weight gain scene. I hope you like it!

I have never written anything like this before, so it's kind of a personal experiment (I don't know if I'd do it again tbh). If someone found any grammatical/spelling/punctuation error or a confusing part, please mention it, english isn't my natal language so all corrections will help.

The thumbnail image is from RAMZI who kindly let me use his amazing artwork. (https://www.furaffinity.net/view/24372802/)

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Bowser was walking in the halls of his old castle guided by three Boos, he had just won his cage match against Midbus the new assistant of Fawful, a terrible beanish creature who recently took control of his castle and most of his minions, the fight let him exhausted, through if someone had asked him how was the fight, he’ll definitely say it was a piece of cake. Surprisingly, just after that, Fawful appeared and offered him a ‘victory feast’, it was a very strange thing to do after defeating his assistant but Bowser knew well that his enemy lost some marbles, so he proceeded to accept the offer, after all, he has always had a soft spot for food.

He knew exactly where will the Boos take him, it still was his castle after all, but when they arrived he was shocked, he has never seen so much food in his kitchen, they were several plates of food already served and lots of ingredients to make even more, the air was filled with delightful smells of the recently cooked plates, all of this made Bowser’s mouth water and his belly rumble with hunger. The ghosts then said to him to eat all he wants and they went back to the entrance, “I will” he said to himself. And so he did, he began to eat the served dishes on the tables one by one until it was nothing left but dirty dishes; unsurprisingly those made him feel kind of satisfied. Thinking he was done he went back to the exit, he had some unsolved issues to deal with Fawful, but before he could do that the Boos met him again, they said those were only the appetizer and there was way more food for him, the great Koopa try to reject them but they insisted on it, saying they could even feed it to him, their words and the delicious food he had already eaten made him feel he couldn’t deny to such a thing, he wasn’t full anyway, but there was something in the situation that made him feel a little suspicious.

Although, that suspicion was easily overridden with satisfaction the moment the first piece of chicken was feed it to him, it was even more delicious than the last meals and it was one of the better plates he had ever tasted. As the ghosts keep feeding him more chicken, donuts, ham and cake alternatively, Bowser was in such an enjoyment that he lost the track of time. It seemed to him like it would never end, when a plate was emptied a different Boo showed up with another one, keeping the feeding process going on, and on, and on.

He would have continued forever if the discomfort of his full belly didn’t snap him out of his ecstasy, he then quickly realized something was wrong, instinctively he demanded to the Boos to stop a moment, who complied with his demand without losing their grins and asked him what was the matter. He was out of breath so he didn’t reply right away which gave him time to analyze the situation, the first thing he noticed was his belly, it has never been this large before, the once solid flat abdomen was now bigger than a Goomba, and though it was definitely caused be the huge amount of food stuffed in his stomach, Bowser clearly saw there was a considerable amount of fat in there, in fact, all the parts of his body that he could see seemed to be thicker, confused by this, he tried to move a bit only to realize how heavy he was now. There wasn’t any way to deny the fact that he had gained weight and a lot, and he knew it was Fawful’s plan from the beginning, “Why would that weirdo want to fattened me?” he thought “Is he going to send Midbus again to fight me? I can’t fight like this, I can barely walk… What can I do now?”. At that moment, the ghosts asked him if everything was fine to continue, he was going to refuse when a risky idea crossed his mind, so instead he replied “Yeah, I was… taking a breath, let’s keep going now!” The Boos shrugged and resumed the feeding once again, “This better work of” he thought as he gulped another donut.

To be able to start his plan, Bowser first needed to stay in the room alone without those annoying Boos, unfortunately the only way to achieve it was eating all the food until they ran out of prepared dishes. So, he decide to eat as fast as possible hoping it would make them leave for more food, luckily it worked and after five more different plates the ghosts were instructed to go help in the kitchen, before leaving, one of them asked him if he wanted more, to which he consented pretending a demanding voice, the Boo then simply assented and left the room. As soon as he was left alone he called Chippy, his little ally that somehow appeared inside of him recently, her irritating voice soon replied to him:
“What problem do you have now?”
“You have to get working! Fawful tricked me to get fat by giving me lots of fattening food.”
“And what did you think it will happen after eating it?”
“I didn’t think, it was a victory feast and I was tired, and hungry.”
“You’re such a lost cause; anyway, what do you even want me to do? I can’t just make the fat disappear from your body.”
“I’m not a fool, of course you can’t! I need you to do something in my body so it could use the food in a way to make me bigger not just fatter.”
“So you just want take advantage of the nutrients in the food to make you grow… I could be able to do that, but do you realize that even doing so you will still get fatter?”
“Yeah, I know!”
“You want to grow that bad since you fought your castle, huh?”
“…”
“Never mind, I’d do that, we still need to defeat Fawful after all, so it might help.”
“One more thing, I’ll eat even more but I feel like I’m gonna explode, so go fix that too.”
“Fine, that’s kind of easy to deal with. But don’t overdo it! Whatever happens to your body will probably be permanent.”
“Don’t tell me what to do!”
After those words she ceased to pester Bowser and, to his surprise, soon after his stomach was already feeling better. He was going to congratulate her for the quick work but the Boos came again with a new set of plates. With the plan fully in motion thanks to Chippy, he hurried them to feed him the food already; they accepted his request with a bit of confusion in their faces. With the stomach pain gone, he now could enjoy the flavors of the distinct plates, but he decided to keep eating fast, hoping to keep the ghosts too busy to realize his future growth. He also tried to focus in his body while he was being fed, to see if the plan was working. As the ghosts quickly got ready to resume once again, he said to himself “This is going to be fun”.

The food now flowed nonstop to Bowser’s mouth at a surprising speed, as he gulped the portions as soon as they were provided to him. The Boos floated frantically carrying dishes around trying to keep up with the new pace, to ease their work they began to simply dump the entire content of the plates to his mouth, this way they could go to the kitchen more times to bring more food; the great Koopa didn’t care the change, he just guzzled down whatever was put in his mouth easily and almost as fast. The effects of the food in his body didn’t take long to manifest, his belly, especially, was the most notorious, it was now bigger than his shell and was constantly expanding, he pated and jiggled it a bit, it was soft but kind of solid at the same time. The rest of his body were affected too, every part of him was getting larger as the time went by, but this time it wasn’t just fatter, it was accompanied with the growth caused by Chippy. Those changes however were subtle and were unnoticed by the Boos, Bowser barely perceived them at first but they became apparent moments later; as his spiky bands felt tighter and the objects around him looked smaller.

The plan was working perfectly and the great Koopa was proud with its results, the best part for him was that the only thing he needed to do was eating the amazing food of Fawful, while Chippy did the hard work inside of him. He was so pleased with the sensation of constantly growing; he began to fantasize about how big he would get, with each plate fed to him, his desire to keep eating increased as well as his height and weight. Sometime later, his daydream was interrupted by Chippy who said “Bowser stop now! You’re eating too much” in an alarming voice, he, annoyed by her, decided to ignore her and keep going, “I’m serious! You need to-” She was suddenly interrupted by a loud groan and immediately Bowser’s belly abruptly expanded to twice its size, this change made him lost balance and fall to his, now wider, butt; the impact of the fall and his weight were enough to break the floor, fortunately, not enough to fall through it, although, his thickened legs were now stuck. The Boos at first were shocked by this but soon their grins came back, one of them started talking but Bowser quickly interrupted “Why did you stop? I haven’t finished yet!”, confused the ghost whispered something to the other ones and since none of them knew what to do, they decided to ask to their superior, as they left again, the same ghost told him they will come back in a minute and asked him to not move in a mocking way to which he gave a death stare in return. With the Boos gone, he was now able to call Chippy again, this time more upset than before.
“CHIPPY!”
“What now?”
“What do you think!? My belly is now the size of a Chain Chomp! What was that?”
“That’s what happens when you overeat and don’t do as I told you to.”
“It still isn’t my fault; now make something to fix it immediately!”
“The last time I checked, I wasn’t the one consuming absurd amounts of food, enough to feed all your minions!”
“Grrrrrr!”
“Anyway, I have good and bad news for you, what do you want to hear first?”
“The good ones.”
“Ok, the good news is that your belly probably won’t extend much more. Also with all that food, I was able to make your muscles bigger, giving you more strength to carry the extra mass.”
“Great! What’s the bad news?”
“Those are that you better get used to your new size, since it came to stay, both in height and weight.”
“Wait, what!? Can’t I just exercise to burn the fat?”
“Normally you could, but the consequences of YOUR plan resulted, as I warned you, to be permanent.”
Bowser was speechless, if that was true, he’d never get back his old strong figure. He proceeded to inspect his enormous belly; touching, slapping and moving it, it felt firm even after all that happened. “It ain’t that bad, I guess I can get used to it…” he said. In fact, he might not be as intimidating as before but at least with his new size; he’d be more difficult to defeat and maybe even more powerful.

The Boos soon came back as they promised; whoever was instructing them probably ordered them to feed Bowser until he couldn’t eat more, since they accepted to continue feeding the great Koopa. “Not bad” he thought “Now that my belly won’t grow as much, the rest of the food should make me taller and stronger”. And so, the feeding proceedings began one final time, he ate every single plate they gave to him, without any distraction in this occasion. The room was getting emptier as some Boos took the remained ingredients in there to the kitchen to prepare more meals, on the other hand, Bowser keep getting heftier and taller with each minute. Eventually, they finally ran out of food, the ghosts were worried, they never imagined this outcome would happen and now they were unsure what to do; the now bigger Koopa, realizing there wasn’t any more plates nor ingredients around, knew the feast was over, he was a little disappointed but also glad the plan work, kind of. “Hey you! I can’t eat anymore, don’t bring me more food” he lied to them, as a result the Boos, relieved by this, followed the rest of their instructions, mocking him for how fat he had become and leaving him alone to inform Fawful their duty was done.

With his plan done and nobody around, Chippy began to talk to Bowser:
“I’m glad this ended, I was starting to think the plan was going to fail.”
“Hey my plans always work! Though, I would have liked to continue a bit more…”
“I thought you’ll say that, you never have enough. I have to admit your idea was ingenious, but it could have been better if you just avoided all of this.”
“Thanks, I guess, you did an acceptable job… thanks…”
“Are you being actually nice with me?”
“NO! Of course I’m not! I was uh… thanking myself.”
“Ha ha ha! Yeah of course, you’re welcome by the way.”
“Shut up!”
“Anyway, don’t you think you have been stuck long enough already?”
“Yeah, I’m on it.”
He tried to stand up but the weakened floor couldn’t hold him so it broke again, this let Bowser’s lower half body hanging while his round belly obstructed him from falling, irritated by this, he smacked the floor with a punch making him fall to the floor beneath, the fall was shorter and less painful than he expected it to be. He looked around the new room, there were several boxes of Bob-ombs, this place should be their deposit, also there was a running machine which looked out of place, it was probably property of Fawful so he might come here, with this in mind, he decided to wait there for a while. In the meantime, now that he wasn’t stuck, he began to realize of all the consequences of his plan on his body; first, it was his rotund belly, which hanged at the same level as his knees and stuck out considerably, making impossible for him to see below it. His arms changed too, they were engorged so much that his spiky bands broke at some point earlier, when he flexed them, he could appreciate the great amount of hidden muscle developed in there. His legs were affected as well as the arms, being now way thicker than before, each tight being wider than his former waist, although he couldn’t see them at this moment. Other parts of his body, like his cheeks and butt, were now chubby and round, becoming more noticeable. And finally, and totally Bowser’s favorite change, was his astounding height, becoming almost twice as tall as his former self, fortunately all of the rooms in his castle, including that one, were big enough for his new size and most of the doors where wide and tall so he could pass through, but he’d still need to get used to seeing everything tinier compared to him.

While Bowser was checking his new body the door opened, it was Fawful followed by Midbus, both of them were extremely surprised by his new size and became paralyzed the moment they saw him, he took advantage of the situation and, before they could do anything, he used his newest ability to inhale the beanish creature, his intimidated assistant barely ran away, not before accusing him for cheating, Bowser didn’t bother to go after him, he knew he couldn’t run anymore and he really didn’t care, instead he was contented for catching his rival inside of him, whatever happened to him was well reserved for everything he has done. “BWAHAHA” he laughed loud enough to make the room shake a little, “With that fool out of the way, now I just have to reclaim my castle and minions, and with my new body it’ll be a piece of cake! And after that I could maybe eat some more…”