Apple Bloom finds a mysterious warp pipe in the Everfree forest. When she enters the pipe, she travels to an new universe around her, which leads to her meeting the king of the koopas, Bowser and his army of minions. However, she ends up making friends with him and now she helps him with his castle and his minions. Now, Apple Bloom makes friends alongside Mario, Luigi, and goes on all sorts of adventures all over the Mushroom Kingdom and other places.

Takes place in the middle of season 5 of Friendship is Magic
This story will mainly focus on the Mario and Luigi RPG games in this crossover.

My Little Pony belongs to Hasbro
Mario belongs to Nintendo

Inspired by stories by Lucar

After the defeat of the villains Tirek, Chrysalis, and Cozy Glow, the Cutie Mark Crusaders are curious to know about the Bewitching Bell to see if they can become stronger ponies. It was only after they cast the spell they now have to deal with the first emperor of Equestria, the father of monsters, Grogar

This is more of a "what if" scenario if the Crusaders interact with Grogar so its a story just for fun.