Obstagoon is trying to set up some Halloween decorations. He has it in the mind to put up a yard balloon for the holiday, but he's unable to set it up. He gets more aggravated with the balloon, but then his falls down on top of the air pump for said balloon. His body quickly puff up, as the pump starts to inflate Obstagoon's body....
Hope ya enjoy, another lil something for spooky season

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Obstagoon grunted, pulling against the heavy latex. The dark type had his snout curled in a nasty looking frown, slowly growing more aggravated on the spot, as the balloons refused to cooperate with him.

It was early in the month of October, a thousand or so dead leaves laid out all across the grass. The cool crisp air sounded the start of another Autumn. Spooky season was upon the small Pokémon suburb. Most everyone else had some sort of decoration set up at their house already, whether it be pumpkins, scarecrows, or cut out skeletons. And now it was Obstagoon's turn to put up his Halloween set piece.

“Son of a bitch!” Obstagoon nearly screamed, pulling against several ropes, cords, and hooks to untangle the balloon some more.

He had it in the mind to simply hook up, and inflate a novelty yard balloon for his house. Knowing it would require practically no maintenance, and he also figured that it would be a breeze to set up. And he was, unfortunately, sorely mistaken on the latter.

He had everything laid out in his yard. Behind him, a portable pump sat, ready to inflate when ready. It ran on five c-batteries, and had a nozzle sticking up from the top of it, with a thick rubber seal on it to make sure it was air tight. He had bought a simple jack-o-lantern yard balloon, but as of right now it sat on his grass in a mix of mixed up orange, black, and green latex. Obstagoon unable to find which way was up and down on it, as every attempt to untie it simply added another knot to the bunch.

“Who made this thing?” He asked, a slightly frantic smile ripping across his face, feeling like he was going crazy. “Is this damn balloon really that hard to open, or am I just damn stupid.” He groaned, tossing aside more and more of the cords behind his shoulder. As he positioned his feet back and forth, he had accidentally curled some of the ropes around his ankles.

His anger at the inanimate object was reaching its boiling point. His white and black face started to blaze red, as the blood rushed to his head. He flared his teeth, and threw the balloon as hard as he could into the ground. “Gah…Damn that fricking balloon!” He cried out, now not even caring if the neighbors heard his rants. He started to back away. “I’m gonna buy a plastic skeleton and put that up instAAAHHH!” He gasped, he frantically tried to grab something as his feet were pulled right out from under him.

While he was angrily pulling out cords and wires, a good number of them happened to wrap around the Pokémon's ankles. When Obstagoon tried to step back, he tripped on them all. His ass fell down, down, and down, right on top of the nozzle of the pump. And, unfortunately for him, the sudden shock instantly turned it on, making it blow air into his rectum.

“YEEAACCCH-WOAH!” He gasped, a deep red blush washing over his cheeks. His face twisted in a sort of pained expression, with a good amount of arousal in there for good measure. He bit his tongue, feeling the hard, cold plastic nozzle up his ass. His eyes then shot open, as he heard the hissing and buzzing from the pump, working hard underneath him. He looked down with a bit of a start, seeing his normally fit, black furred belly already starting to puff out by a few inches.

“Dammit.” He gasped out, an embarrassed blush rising on his face as he quickly looked around him, letting out a small sigh of relief when he saw no one had seen his blunder. He got himself back up to his feet, as he tried to pull the pump out of his rear.

HHHHHHhhSSSSSShhhHHSHHhHSHHhHSHSH!

The pump kept filtering air into Obstagoon’s figure. His brow lowered as he tried again and again to tug the machine out, but found it was stuck. He bit his tongue, feeling the tip of the nozzle rub back and forth deep inside of his rectum, feeling all of the air rushing inside of his guts. His belly only ballooned out more. His black tummy quickly rounded out, making it look like he had swallowed a beach ball. His gray hide started to bow out now too, making it look like he had a fat set of love handles.

“C-come on!” He whimpered to himself. A bit of sweat started to pore from his brow, his face only growing redder. His paws gripped onto every inch of the pump, but he just couldn't Pull it out. The thick rubber seal did its job in making sure the “balloon” wouldn't slip off before the inflation was over. He tried to feel his way for the on/off switch, but that proved fruitless too. Now growing more frantic, he paid less attention to what he was doing. Now just rapidly darting his paws all across the pump, achieving a lot of nothing.

His tummy had grown three times over in the past few minutes. The front of his bloated belly now stuck a grand three feet out from his figure, forcing him to stand at an awkward, wide stance. His hips had puffed out alongside his stomach, his midsection rounding out to a perfectly spherical, massive ball. Obstagoon whimpered as his back started to inch outwards now too, quickly making it where he could no longer reach the pump at all.

HHHsssHHHHSssssHHHHHssssSHHHHHShshhsss!

He turned back round, pawing all over his now gigantic figure. He groaned, feeling how stretched out his hide was getting, feeling as tight as a drum now. His back rapidly puffed out to catch up his belly. His belly grew bigger than a smart car, softly jiggling back to back with every labored movement Obstagoon made. His hips and back rounded out perfectly to match the width of his tummy.

The pump continued to do its job, still rapidly sucking more air in and blowing it all up Obstagoon’s ass. So, it was really no surprise when his booty started to blow up as well. His two cheeks inched outwards like two balloons, as the air was forced into them. His hindquarters stuck out like two massive yoga balls, sticking out slightly more than the rest of his back. Giving Obstagoon a badonkadonk that would have made anyone blush.

He looked around himself, rapidly grabbing over parts of his puffed up hide, true panic setting in as he felt more and more air rush up his rectum.

“Oh–Oh no….help…me” He gasped out, too afraid to scream, instantly getting more embarrassed just imagining other Pokémon looking at him now. His face started to be affected too, his cheeks puffing out on his neck, some air escaping his mouth.

He grunted, straining to stand now with how big he was. His two legs were puffed out now too. His thighs looked like two massive oblong balloons with feet stuck on the end of them. He grunted some more, still managing to hold his footing, until that was taken away from him too. His feet fully sunk into his puffed out figure, leaving only the tip of his claws sticking out from his overinflated legs.

HHHHHssssssHHHHHHSsssssHHHHHHHsssssHHHHHHSssSHHHHsss

And, almost as if playing catch up with the rest of his balloon of a body, his arms started to fill up. Quickly puffing out on his sides, growing wider and wider until they looked like two massive, ready to burst innertubes sticking out on the top of his bloated body. His paws, much like his feet, started to sink into his inflated wrists, leaving only the ends of his fingers sticking out.

Obstagoon’s head softly sank more and more into his insanely massive figure , The bottom of his chin disappearing, partially buried by his bloated chest. He moaned, now only able to let out weak whines and pouts. The embarrassed blush still burning bright on his face. Now unable to even see past his own body, his head almost completely sunk into his growing figure.

Obstagoon was no longer recognizable as even being a Pokemon. His body was a massive, enlarged caricature of its former fit self. His belly, hips, and back all stuck out more than fifteen feet from what used to be Obstagoon’s figure. HIs legs and arms were puffed out on the sides of his body, all now roughly being four times bigger than he was not ten minutes ago. His ass was simply gigantic, rounding out to be the biggest part of him, sticking out a good five feet from where his back ended. Leaving Obstagoon with a titanic booty, both cheeks puffing out to be bigger than weather balloons.

HHHHssssshHHHHHSsssHHHHHSssssHHHHHSssss

His body softly rocked back and forth on the grass, resting on top of his enlarged belly and ass. Obstagoon moaned, feeling his head be compressed as it started to sink the rest of the way into his massive figure. He nearly cried, feeling how painfully tight his body was now, almost as if his hide was literally stretched to be paper thin. He whimpered, not knowing how much more his body could take.

HHHSssHHHHSs-KKKKRruUPPrlGGhhTTT!

And then, the pump was destroyed. As Obstagoon‘s booty grew more and more, it had also been pressing harder against the machine. The pump held on at first, but his ass quickly grew too powerful for it. The thing was squashed like a bug in between his tight, glorious ass cheeks. Ending Obstagoon’s inflation as the pump was crushed into a thousand pieces.

He looked up, a small smile on his face, knowing that his inflation was now over. A few, somewhat happy muffled sounds reverberated through his cheeks. Though his joy was tampered by the fact that he had absolutely no idea how to get back to normal. He groaned, although happy to know he wasn’t gonna pop, still salty, not knowing how long it would take him to naturally deflate.