"After many adventures Sunset Shimmer and her friends have been on, they're in for an adventure of a lifetime. When Giant Monsters attack their world, they don't know how they appeared, but one thing was for certain... they needed help. Their prayers are heard, when a Human Reionyx named Rei is summoned to their world. Together with his Kaiju partners, Gomora, Litra, and a recently reacquired Eleking, Rei and the Rainbooms must work together if they are to save their world."

Ultra Galaxy Mega Monster Battle belongs to Tsuburaya
Equestria Girls belongs to Hasbro

(Fair Warning: Flash and Twilight will be shipped in this story.)