This movie chronicles the epic battle between the Autobots and the Decepticons in their mission to defend Earth against Unicron and one day restore their homeworld Cybertron.

Music rules and rainbows rock as Twilight Sparkle and pals compete for the top spot in the Canterlot High "Mane Event" talent show. The girls must rock their way to the top, and outshine rival Adagio Dazzle and her band The Dazzlings, to restore harmony back to Canterlot High.

Every four years, Canterlot High has 'The Friendship Games' where they must rival with different schools with a series of different sporting events and every year, the cup has gone to Crystal Prep. So Fluttershy, Pinkie Pie, Rainbow Dash, Rarity, Applejack, and Sunset Shimmer must work together to win the cup. But they find out that the other Twilight Sparkle is on the opposing team.

When Sunset Shimmer finds out that her friends have no memory of her, she's shocked to hear that after Human Twilight was reformed, all trace of Sunset had simply vanished. Desperate, Sunset is determined to bring her friends' memories of her back to them. But to do so, she must first find the perpetrator who did such a thing in the first place.