After an inter-dimensional villain named Eon was sent back to his own timeline by his "friend" Maltruant he decided to restart the time war with Planet Hasbros as the main target. After getting allies new and old across cross-time for his endeavor, Equestria will need all the help they can get. Thankfully Eon's nemesis known as Professor Paradox knows the perfect people to help fight against him. It's the magic of friendship teaming up with knowledge of the space-time continuum, the power of the omnitrix, control of mana, matter manipulation, good old-fashioned Plumber training, and amorphous shape-shifting fighting for Equestria's survival and most likely for the survival of the rest of cross-time.

Takes place one week after The Cutie Re-Mark and a few days after the series finale of Ben 10 Omniverse