Gabby tries to get her cutie mark by turning herself into a pegasus filly

Starlight Glimmer's plan to go back in time had backfired, and she turned herself into a foal and went back further than she intended. Now she has to find a way to return to her own time and into her adult body.

Royal Guards start to be demoted into maids by Princess Celestia herself. It's up to the first stallion turned to a mare to stop her

Trouble Shoes found an enchanted mirror pool that turns him into the exact opposite of himself. Not only that but the pool gave him endless good luck but it also swapped his gender as well.

After getting ditched at dinner Princess Celestia gets bored and throws a party at Twilight's Castle

Princess Celestia finds a strange bow and a quiver full of arrows then uses them to make ponies fall in Love on Hearts and Hooves Day

An old, enchanted tome from the castle of the princesses transformed Spike into a handsome unicorn stallion. With this new body he woes Rarity with lies and his new powers to make her believe he is a prince.

Daring Do was pushed her into a Fountain of Youth and was regressed into a foal. She then finds Ahuizotl (who was also regressed into a kitten). The two have to trek through the jungles of the Tenochtitlan Basin and find a way to turn back to adults

Big Mac starts to have dreams of being an alicorn princess while Princess Luna acts as his guide.

Silver Platter was once a party clown, but Rarity's dark magic turned him into a fancy waiter. Sick of his job, he turns to Pinkie Pie for help to turn back into a party clown.

An anthology of short stories that I was inspired by this particular episode

Fluttershy has been turned into a baby bat pony and has to somehow find a way back to Ponyville to change back to an adult pegasus.

A series of small tales of how Twilight has constantly ended up turning into a foal..

An Anthology of short stories of Celestia being babied

Big Mac discovers he is the next in line to wield the Amulet of Malum. This ancient artifact transforms him into a princess alicorn and with this newfound power, he must protect Equestria from the minions of Nightmare Moon.