MLP: Gluttopolis

This takes place in the world of MLP. Gluttopolis is a small town a couple miles north of Canterlot. It's inhabited by a couple dozen ponies but it has a unique twist that other towns don't have. Gluttopolis is a town that despite being inhabited by ponies, is entirely run by robot drones, specifically caleed 'Feeder Drones'. And those Feeder Drones are shaped like regular ponies, though with special fuctions such as jet boosters and are able to cast magic desbite being inorganic, and are programmed to only fufill a single task: Feed everypony, non-stop, 24/7, make them as fat as possible, stuff them wish as much food as possible, anypony that's not obese must immediately be corrected, the ponies of Gluttopolis must be stuffed with so much food untill they can no longer move, untill their doughy bodies bury the entire town, untill everypony is nothing more than massive mountains of doughy fat and flesh.

The drones magically conjure as much food as possible and stuff them into the maw of the nearest pony, and if that is not sufficient, which it never is, the drones will connect feeding tubes to the pony, and stuff multiple feeding tubes into every single hole availible, the pony's mouth, anus, vagina, urethra, it doesn't matter, the drones will make sure everypony is stuffed to the brim with an endless supply of food. As that is what they've been programmed to do, and they will keep doing it forever, not concerned with the ramifications of their actions as they are not sentient, they simply fufill the provided task, which is to feed, and they'll keep feeding ponies forever, making their fat bodies grow to impossible sizes, outgrowing houses, towns, cities, mountains, continents, planets, star systems, galaxies, there is no limit to how big these drones will fatten ponies up, there is only bigger, and they'll never stop, even if the universe is nothing more but an endless ocean of doughy fat and soft flesh.

The Feeder Drones do not ask, they simply feed, they do not care when, where, or how, they simply feed as they are programmed to, they will anypony that enters Gluttopolis over a specific perimeter that encompases the entire town. They will forcibly feed anypony that enters the town, and non-obese ponies are absolutely unacceptable. They do not wait for permission or ask any questions, they simply introduce themselves to the nearest pony and start force feeding them the fattiest, sugariest, unhealthy food imaginable.