One peaceful day in Equestria, a young Stallion and his brother were invited to a party at the castle by Princess Celestia. After a surprise attack by one of her most fearsome enemies, Mario is sent on a journey across the entirety of Equestria to restore harmony to the world, with the help of a few allies

This fanfiction is based on the video game Paper Mario, and set in Equestria, albeit a slightly different one to the one in the show

A few weeks after returning from the Crystal Empire, Twilight Sparkle receives a parcel in the mail from Princess Cadence. Within it, was the diary of a pony that lived during the reign of King Sombra. What mysteries could be hidden between the covers of the ancient tome?