Foster's Home for Imaginary Friends/My Little Pony

Cast

 * Jennifer Parker (from Back to the Future) as Twilight Sparkle
 * Mac as Spike
 * Frankie Foster as Rarity
 * Audrey (from The Lorax) as Rainbow Dash
 * Wendy Corduroy (from Gravity Falls) as Applejack
 * Candace (from Phineas & Ferb) as Fluttershy
 * Mabel Pines (from Gravity Falls) as Pinkie Pie
 * Marty McFly (from Back to the Future) as Flash Sentry
 * Duchess as Nightmare Moon
 * Terrence as King Sombra
 * Gwen (from Sky High) as Queen Chrysalis
 * Biff Tannen (from Back to the Future) as Lord Tirek