Announcement:

When Princess Shroob and the Shroobs invaded the Mushroom Kingdom and Bowser's castle, Mario, Luigi, Yoshi, Bowser, Bowser Jr., Wario, Waluigi, and Boshi went to stop the Shroobs, rescue Princess Peach, and take back Bowser's castle. As Princess Shroob unleashes the Dark Star and was about to use its power, it caused a chain reaction that somehow made a connection from the Mushroom world to another world called Earthland. It was then that Mario, Luigi, Yoshi, and Bowser found themselves in a magic guild called Fairy Tail and will meet and join forces with Natsu, Lucy, Gray, Erza, Wendy, and the other wizards.

(I do not own Mario, Fairy Tail, or the OCs, they belong to their own creators)