A new enemy appears and along with a group of young fillies and colts. The Mane 6 fight a new threat and learn something from Luna's past which not even Celestia knows.
Kamen Rider Zi-O! Grand Time! Kuuga, Agito, Ryuki, Faiz, Blade~! Hibiki, Kabuto, Den-O, Kiva, Decade~! W, OOO, Fourze~! Wizard, Gaim, Drive~! Ghost! Ex-Aid! Build~! Iwae! Kamen Rider~! Gra~nd~ Zi-O~!