When the Caribou corrupted the Crystal Heart, the only one who managed to flee the corruption was none other than an eight-year-old Flurry Heart, who had fled until she reached Ponyville, where she warned her aunt Twilight of the caribou.

She was kept safe by her aunt until the Caribou reached Ponyville, where they fled to Canterlot, but a brainwashed and greed-grown Spike had caught Twilight, but while she was being raped, she had managed to teleport her niece towards somewhere safe while her clothes were being stripped.

Flurry was eventually found by Bowser and his forces, who were horrified when they heard what had happened to her home. Enraged, Bowser decides that enough is enough, and declares war on the caribou, intent on taking Equestria for himself, mainly because he might as well show that false king how a true king would rule the nation.

Mario characters take their normal forms while Equestrians are anthro.