This story is a sequel to Ponymon Girls: Shades of Harmony
Fluttershy and Rainbow Dash have to find the Legendary Beasts after they start roaming around the city of Canterlot, before they can cause various disasters, like seismic events, severe lightning strikes, and gale force winds that would laying waste to the city. Can they find them and save the town?
I don't know who made the cover art.
Proofreading performed by lunarderpy1