Heroes. Not many can be called as such, but every world has them. They also have their villains...and monsters. This is a tale of one group of heroes meeting another, and see if they can be more than a team--than heroes--and become friends. Discord has reached far beyond the confines of his stone-encased prison to offer the peaceful world of Equestria to two of the most dangerous villains ever known. The maniacal genius of Doctor Eggman joins forces with the mighty Koopa King Bowser to plunge the new-found world of Equestria into chaos. The Princesses of the Moon and Sun must muster all of their immortal strength to defend their realm from the tyrannical duo. If that should fail, Equestria's last chance falls to the Bearers of the Elements of Harmony...but their power--and friendship--is untested against dark forces from another dimension. But hope comes from a band of heroes: legendary warriors from different worlds who have assembled to fight as one against long time foes and would-be oppressors. Will Video Game's Mightiest Heroes arrive in time to assist the Bearers of Harmony? Or will they be too late?

Or their combined power not enough?