The Harmony Guard

AU. Twilight and Spike have been trapped in the past for several years now. They then tried a spell to summon six creatures to be the Bearers of the Elements of Harmony, along with this timeline's Starlight and Sunburst.
However, something goes wrong and two childhood friends who haven't seen each other in years, two young Heroes-in-Training(one then with a secret), a young Monkart racer(with a friend(?) of his by accident) with little memories of his past, and an Exwire with a magical gift are summoned instead.
Now watch(read)as the six becomes The Harmony Guard and take the place of the Main 6 as villains old and new attack Equestria.

This story is inspired by Emma Iveli's "My Little Hero" on FanFiction. And it takes place during season 4 of Yu-gi-Oh GX sometime after Syrus dueled Makoto Inotsume. A few days after Rin and Yukio destroyed the man-made Gahenna Gate in Blue Exorcist. And a month after season one of Monkart.

Oh, and pretend that Zecora is speaking in rhymes when she comes around. I'm not to good with rhymes.