Hey there, just your average pony fan and purveyor of pony pudginess from the UK here! I occasionally do small stories of pones getting rather large, so stick around and ya might see some haha!
Princess Celestia takes a vacation and ends up taking the source of her stress with her. Luna's timely intervention allows Celestia to accept herself. Weight Gain fic.
Cheerilee tries some of Apple Bloom's new treats, and finds herself enjoying them. Her figure changes as a result of her enjoyment. (specifically a weight-gain story)
2nd point of view on living as a fat pony. Being a spoiled unicorn named Lyra Heartstrings. Living alone with a lot of weight piled on one pony can really do a lot when you have to do stuff yourself and your feeder isn't home.