Mar10 Day themed mass inflation with a story.
https://www.deviantart.com/absolonanonymous/art/Rise-of-the-Mushroom-Kingdom-1308306045
Rise of the Mushroom Kingdom by AbsolonAnonymous
"Honestly, it was all so simple. He couldn't believe he had never thought of this before.
Kamek's feet sunk softly onto the rubbery surface he was walking on. The magikoopa usually opted to fly rather than expend the extra effort to move about in this manner, but today was a special occasion. For you see, he did not walk along some simple road or even the floor of his master's castle.
No, the bouncy pink "ground" beneath him was in fact the enormously engorged ruler of the Mushroom Kingdom. Princess Peach was as nearly as round as a ball and nearly the size of her own airship, helplessly whimpering as the tiny magician approached her swollen face.
The formerly svelte princess was not the only overblown blimp in the sky. The horizon was dotted with bulbous subjects of the mushroom kingdom, each one letting out muffled cries as they bobbed about like soap bubbles around a bathtub. If you squinted, you might even catch the absurdly stretched overalls of the Mario Brothers in the distance.
Using his magic to combine the bizarre Blorbs malady with the properties of a P-Balloon was a stroke of genius if he did say so himself. It was a simple matter of infecting some of the more vulnerable folk of the Mushroom Kingdom and watching it spread. They puffed up into the air like popcorn flying out of a frying pan. It was a delightful sight! And once their champions had fallen to his curse he simply had to move in and administer it to the princess himself.
But you see, he still wasn't done. Such a momentous occasion really should end with a bang, after all. Smiling, he removed the coupe de grace from his robes: the floatacious blimp fruit!
Peach's eyes went wide as she and she began to struggle again, only causing her swollen body to wobble about in the sky. She collided with Daisy, who was similarly round and bouyant, causing both to squeak and bounce away from each other. None of this motion deterred Kamek, who plodded up to Peach with a twinkle in his eye.
"Open wide, Princess!" He laughed wickedly, shoving the entire fruit into her mouth and forcing her to swallow it.
Peach let out a groan after loudly gulping what remained of the fruit. A moment of silence followed. Kamek expected this - after all, the princess was already quite bulbous. It would take a moment for the fruit to hit the pit of her ballooned gut and take effect.
His patience was rewarded. A gurgle reverberated in her swollen body like a drumbeat. Another followed. And another. It was joined by a hissing sound. Kamek could feel Peach's body expanding beneath him. The princess let out a concerned wail as she once again started to rapidly expand outwards. Even her desperate wiggling had ceased as every inch of her grew as taut as a drum.
Hearing a very strained stretching sound, Kamek hopped into the air, allowing himself to be taken away by a current.
"That's my cue Princess." He snickered
"Hope you have a blast!"
Peach's eyes darted back and forth looking for an oppurtunity or rescuer. But the only things in her line of sight were own enourmous form and the blorbed inhabitants of her kingdom. She was truly helpless. There was nothing she could do to stop herself from inflating ever larger. Any moment now, she would-
POP!"