A Wolfrun weight gain story inspired by http://www.furaffinity.net/view/8739660/ an artwork done by the ever-talented  blue-crow

Hope you like it!

The warriors of the Bad End Kingdom were somewhat hesitant to resume their duties. Smile PreCure had thwarted many of their attempts to revive their lord Pierrot, and bring the human world to its Worst Ending. As of now, they decided to take a short break from their duties. Red Oni had gone off to throw a party, taking most of the castle’s drinks along with him. Majorina took a little trip on her own to gather materials for her little inventions (making her own break not much of a break at all). Wolfrun, who had already done most of the things he wanted to do, took this particular day to stay at home and sleep off his stress.
The ever-mischievous and always dutiful Joker remained at home, very annoyed. At this moment, he seemed to be the only one who still cared about achieving the goals of the Bad End Kingdom. Currently, there was precious little he could do without having to order his subordinates around, but he failed to notice their determination after they had all went off to their vacations. Joker had decided to teach all of them a lesson in staying dedicated to their lord, and since Oni and Majorina were away, the misfortune fell to Wolfrun to be the example for everybody.
There was only one question troubling the clownish trickster. What kind of punishment would he have befall the young, silvery wolf.
“Don’t we have any drinks around here?” Wolfrun yelled. “I’m so thirsty, I could drink an entire ocean!”
Only one word whispered through Joker’s sinister grin.
“Bingo.”

Wolfrun was just finishing the last of the juice he found, which wasn’t much to begin with.
“Jeez,” he sighed. “You’d think we’d have more drinks than we do around here. The water tastes like crap and Oni just had to take all of the drinks for a party. Jerk.”
The wolf threw away the bottle he had, found a couch nearby and fell on it dejectedly.
“Maybe I’ll just go out and get some more drinks,” Wolfrun sighed. “I’m just soooo exhausted.”
He began panting heavily. His mouth was dry and his throat felt hot. He was desperate for any beverage he could get his furry hands on.
“It’s a good thing I’m here to help,” Joker’s voice rang from close by.
“Huh?” Wolfrun’s ears perked at the clown’s words.
He got up to see Joker waving at him innocently, holding something behind his back.
“Hmph. And how exactly do you plan on helping out?”
“Oh, I just thought that I’d do a little something to quench your thirst.”
“Really?” Wolfrun yelped excitedly. “You went out and got some drinks, huh?”
“Even better,” Joker said with a slight chuckle. “I went ahead and cooked something up myself.”
Wolfrun raised one eyebrow suspiciously.
“Oh, no need to look at me like that! Not when I have this for you.”
Joker took out a little bottle with a skull-and-crossbones sticker on it. Inside was a shiny blue liquid inside, which reflected light like sparkles. Wolfrun couldn’t keep his mouth from watering at the sight of it, though he wasn’t sure if it was simply his overwhelming thirst or the enticing appearance of the drink.
“I made it especially for you, Mister Wolfrun.”
“You shouldn’t have, really!”
Joker twirled the liquid in the bottle hypnotically, with Wolfrun following its every motion.
“Here you go,” Joker said innocently as he handed Wolfrun the tiny bottle. “Drink up.”
Wolfrun was about to snatch it right from his hand, but the sticker on the bottle gave him pause. He gave Joker a very suspicious glare.
“What’s with the sticker? I don’t like the way it looks.”
“Oh, this? Well, I just grabbed any old bottle to fill up. That being said, I didn’t even notice this sticker.”
Normally, Wolfrun’s common sense would have kept him from believing such a flimsy story, as well as refusing the drink altogether. Unfortunately, his watering mouth and unhealthily dry throat kept him from thinking clearly. He simply shrugged off his concerns and took the bottle.
“Well, I guess I can’t argue with such sound logic. Why such a small bottle, though? You really think this is enough to satisfy me?”
“Well…I think you’ll find that this particular drink will quench your thirst in earnest.”
Wolfrun chuckled expectantly.
“I like the sound of that,” he howled.
Wolfrun held the bottle up to his muzzle and took one tiny gulp to test the waters.
“Grrk!”
Suddenly, a sinister grin crept along Joker’s face.
“Clown, this…” Wolfrun began.
“Yes…?”
“…This stuff is damn tasty!”
“I’m glad you think so,” Joker exclaimed. “Drink up, then! It’s all yours, my friend.”
“Don’t mind if I do!”
Without any more hesitation, Wolfrun began guzzling down the blue liquid as if he had just found an oasis in the middle of a desert. Gulp after gulp traveled down the wolf’s parched throat, and he began feeling more and more satisfied with each swallow. He expected to run out quickly, what with how tiny the bottle was. It never seemed to do so, however, so he kept on drinking.
“And now the fun begins…” Joker thought with a small cackle.
Wolfrun didn’t even realize what was happening to his body as he drank. His cheeks started puffing up as if he were holding his breath, and his chin was taking on a good amount of fat as it started sagging flabbily. His chest started taking on some water, filling up rapidly and giving him a glorified set of furry moobs. Wolfrun’s belly began ballooning out, already dwarfing his saggy chest. It crept over the waistline of his pants as it inflated with fat, followed by his hips, which were spilling out of his pants and began forming lovehandles. Speaking of his pants, they began filling up and stretching with his thickening thighs and fattening legs, rhythmically swelling out with each swallow. Even his butt was growing and swelling, becoming heavier and heavier, filling up with this strange potion. It became so flabby, that it nearly passed the back of his knees.
Joker marveled at his handiwork. Wolfrun was foolishly oblivious to the seemingly endless liquid the bottle was producing; that and his body becoming fatter and heavier with each passing second. Everything was going according to plan.
Soon enough, Wolfrun’s slim, fit figure was a thing of the past. It was replaced with a fat, jiggly pooch inflated with delicious blue drink.
With one final gulp, Wolfrun finally quenched his thirst and slammed the drink on a nearby table, ignoring how heavy his arm had become and the flabby jiggle it produced from the slam. He licked some leftover drink from his mouth and laughed with satisfaction.
“Man, that stuff was delicious!” Wolfrun exclaimed. “Hit the spot, I tell ya!”
Wolfrun patted his fat belly, and finally noticed something strange. For when he patted his stomach, he noticed a slight jiggle throughout his body with each impact. He looked down and to his shock, he could barely see past his gigantic belly. He waddled over to a mirror and observed his newly fattened body all over, staring in horror all the while. He grabbed his plump cheeks and lifted them up and down. He saw his thighs rubbing together closely with every motion. He lifted one arm and flapped its large, thick flab. He turned around to see his tightened pants forming around his gigantic butt. When he grabbed it, it felt soft and flabby to the touch. Finally, he turned back around and hefted his big belly up, shaking and jiggling it.
Joker was laughing hysterically behind the fat wolf.
“You seem to have put on a little weight, poochy,” Joker exclaimed through his laughter.
“You…! What was in that potion!? What did you do to me!?”
“Put simply, I’m punishing you for shirking your duties to the Bad End Kingdom.”
“So you fattened me up like a pig!? Look at me! I can hardly fight with a big body like this!”
Wolfrun tried running towards him. Unfortunately, not being used to his new weight, he fell over on his big soft butt.
“Serves you right for slacking off these past few days!”
“Of course I was gonna get back to work! It’s just…those PreCure are really tough…and we all just needed some rest! It’s not like we have to get the Bad Ending so soon.”
Suddenly, Joker grew angry. He snatched the potion from the table and jumped right onto Wolfrun, landing softly in his fat body.
“It’s that kind of attitude that proves how disloyal you are to our lord Pierrot!”
“W-what!? I didn’t mean it like that!”
Joker’s expression softened, but his demeanor remained cold and ruthless.
“It looks like you still need to learn some manners,” he said sing-songy.
Wolfrun’s eyes widened in fear, wondering exactly what he meant by that.
“What are you going to do?” Wolfrun asked hesitantly.
Joker shook the bottle, and the potion inside.
“Let’s just say there’s still plenty of this potion left for you to enjoy.”
Before Wolfrun could protest, Joker shoved the mouth of the bottle into Wolfrun’s muzzle, and jumped off. Some of the potion spilled into his mouth and it began working its magic. Once again, despite knowing full well the effects, Wolfrun found the drink delicious and above all, irresistible. He began downing it as enthusiastically as he had before. He muffled and consciously screamed for his body to stop, but that only served to make him drink even faster.
With a mischievous grin, Joker only sat back and watched the show commence all over again.
Wolfrun’s already bloated body began inflating and fattening once more. His cheeks and chin began puffing up and getting bigger. His belly started swelling in beat with his gulps, and began overwhelming his fat moobs and flabby arms. His lovehandles began blobbing over his waistline, jiggling as they burst from his pants and settled on the fat of his growing butt. He could hear his pants starting to tear, and looked down to see his thighs rapidly thickening and flabbing over his fat legs and knees. His paws now proved useless as he wiggled them as much as he could around his fat ankles. The seat of his pants began tearing as well, making way for his big, swelling butt that was practically spilling out of each hole and passage his pants would allow it to.
Eventually, Wolfrun had finally worked up enough willpower to spit out the bottle, but it was already too late.
The bottle landed on the ground, finally showing signs of emptying as it spilled on the floor.
“Oh, great,” Wolfrun thought. “Now it starts running out.”
The deed was done. Wolfrun was now a joke of the swift, strong warrior he was only minutes ago, having turned into a fat and immobile blob of a wolf. He rested his flabby arms on the apex of his enormous belly. He wiggled his feet and tried to move his tree-trunk thick thighs. But those and the rest of his body were too heavy for him to do anything but squirm helplessly in place. His pants still threatened to tear, straining from trying to contain his thick thighs, plump legs, and gigantic butt.
Wolfrun was extremely ashamed, angry, and embarrassed at what he had become.
Joker strolled behind him and gave Wolfrun’s flabby butt a smack, causing him to yelp in pain and surprise and his entire body to jiggle.
“Did you enjoy this little spectacle as much as I did?” he asked teasingly. “Of course you did! After all, you were the star!”
“You’ve gotta be kidding me! Look at what you’ve turned me into!”
“I thought you’d be happy! At this rate, now you have no choice but to rest up! You’d be pretty useless, trying to drag around your great, big behind!”
Wolfrun growled and snapped his fangs at the clown.
“Don’t fret, you big doggy! I’ll change you back soon enough. Just as soon as you help me by being an example.”
“An example for what?” the wolf asked nervously.
“For what’s in store for this little trio if you ever decide to take a few days off again. Our work is very important, and every employee counts. Once those other two come back and see how much you’ve grown, I’m sure they’ll be more than happy to hop back into the old grind.”
“But…you will change me back, right?” Wolfrun growled. “Every employee counts, after all.”
“Like I said, that’ll come soon enough. But to my knowledge, those two aren’t coming back for another few days at least.”
Wolfrun suddenly remembered the same fact and became nervous again.
“So what are you going to do with me until then?”
“Hm…”
Joker jumped onto Wolfrun’s belly, and flopped down on it as he would a soft bed.
“Oof,” Wolfrun exclaimed.
Joker went on to tickle his fat belly, squeeze his lovehandles, and went back to tickling his thick thighs, causing Wolfrun to laugh against his will. He ended off by going up to his face and rubbing his cheeks deeply and roughly, with the fat wolf’s displeasure clearly painted on his face.
Joker went back and rested comfortably on Wolfrun’s soft belly.
“What to do with you, indeed…”
Wolfrun gulped nervously as Joker chuckled deviously.