While visiting Aunt Darla and Uncle Urchin in Paris, Estelle and Dot are suddenly taken to a mysterious world known as Pocketville where they both discover that they are the wielders of the Ocean's Heart and are in time for the incoming Friendship Ceremony. However, all is not well when evil Princess Eva is interested in kidnapping Dot for revenge and also meets an old face.
- Attack of the 50-Foot Whatever: At the climax of the fanfiction, both Princess Ava and Eva transform into giant versions of themselves and get into a rather gargantuan brawl.
- Crossover: Between Puppy in My Pocket: Adventures in Pocketville and My Little Pony: Friendship Is Magic.
- The Glorious War of Sisterly Rivalry: Ava and Eva even have a literal battle at the climax.
- Mega Neko: Ava and her sister Eva are cats, and they transform into giant ones.
- Princesses Rule: Just like in the canon show, Ava is the princess of the Pocket Kingdom instead of the queen.