Late one night in the city of Maretropolis, a lab but the name of Marex-Corp is broken into by a mysterious character and makes off with an unknown chemical. It's up to the Powerponies to stop this fiend before she can wreck the city, or is there more to the villains plot then just anarchy?

Edit - 14/09/2020 - Added more detail, fixed spelling and grammar and some scenes I thought didn't read very well.
Cover art by Lupin Quill

-Set in the Powerponies universe.
This story contains
Fat -From Chubby to Immobile blobs
Weight gain
Muscle to Fat Transformation
Very light bondage
Very slight macro
Cheesy jokes

Discord doesn't need to pay for rent, doesn't need to buy food and so doesn't need a job. Fluttershy thinks otherwise, forcing the mischievous Draconequus to go and find employment to keep himself busy. By chance, he finds work as a food critic, and becomes rather proficient. Much to the detrimental effect of the nations waistlines.

This story contains-
Fat - From chubby to immobile blobs
Weight gain
Gas - Belching and Farting
Slob
Mind alteration

Starlight seizes an opportunity to allow herself some revenge on Rarity, and thus Princess Twilight Sparkle herself.

Contains weight gain.

This story is a sequel to Home Comforts

What could be better than a fun day at the Wonderbolts show? Well, how about a day touring the illustrious Wonderbolt Academy?

After "acquiring" the winning raffle ticket, Midnight Star is given the honor of a private tour at the Wonderbolts Academy. For her, it’s just the perfect opportunity to have a fun-filled day. She’ll have a chance to take some photos, meet some important Wonderbolts, and maybe, just maybe, get them alone so she can show them her "special touch."

It’s guaranteed to be a tour nopony will ever forget.

This story is a sequel to Birds of a Feather

When Midnight finds two stallions just waiting for her to have some fun with in the woods near her woodland cabin, she can't believe her luck. Unfortunately, they prove to not be very eager to come with her... and Midnight is not a mare you say no to, as they will soon find out.

Contains: fat/obese ponies, kidnapping, forced weight gain.

This story is a sequel to A Midnight Date

Midnight Star's got some new fun in for her -- a cute stallion finds her in the desert. Unfortunately for him, Midnight can't stand him from the moment she sees him. And when Midnight can't stand somepony, she pulls no punches in having fun with them...

Contains: unwilling weight gain, extreme obesity/blobsize.

Soarin has spend a decade and a half with the Wonderbolts. His career is the stuff of legends, breaking dozens of records and ensuring his place in flight history. A generation of mares have grown up drooling over his picture in glossy sports magazines.
But all good things must come to an end, and for Soarin, his flying career ends in a rather big way.

Contains male weight gain, light bondage, force feeding, farting, a female feeder, and some really dubious DIY.

When a strange mare comes through Ponyville and asks Caramel to accompany her, then to follow her into the woods, he can't believe his luck. Unfortunately, she has something a bit bigger planned for him...

Contains: fat ponies, fat inflation, and forced weight gain.

This story is a sequel to A Moment On the Lips

Thunderlane and Cloudchaser have an evening of romance and possible intimate pleasantry planned for the night. However, a certain mare is back in town, and she intends to change their plans in big ways.

Contains: fat ponies, extreme obesity/immobility, fat inflation.

Major props to H123G for giving me this idea!

Having aced aerial manoeuvres, death-defying stunts and formation flying, Soarin now faces the biggest challenge of his Wonderbolt career... helping his morbidly obese commander get dressed.

Contains: Fat ponies, struggle to fit into clothing, crushing.