The Justice Guardians have come to celebrate the Friendship Festival. But when a new enemy known as The Storm King and his commander Tempest Shadow, a unicorn with a broken horn, arrive and attacks Canterlot, Twilight, her friends and the team must travel beyond Equestria to find a way defeat this new foe. Along the way, they discover new places and meet some new characters such as Capper, a cool cat with the charm of a con-artist, Captain Celaneo and her crew who were once pirates and Princess Skystar, a princess of sea-ponies.
- Ariel, Kion, Bunga, Ono, Fuli, Beshte, Jasiri, Connie, Lion, Greg Universe, Rapunzel, Elsa, Anna, King Julien, Maurice, Mort will guest star in this.
- Capper and Tempest Shadow will join the team at the end.
- END CREDITS SONG: Rainbow (performed by Sia)
- Last Laugh For Tonight:
- Statler: Alright, Ren! We watched your video now!
- Waldorf: Yeah! Delete the video now!