My Little Pony: Equestria Girls: Rainbow Rocks/Powerpuff Girls

Cast

 * The Rainbooms as Blossom, Bubbles and Buttercup
 * The Rainbooms' father as Professor Utonium
 * The Dazzlings as Brat, Brute and Berserk
 * Flash Sentry, Prince Blueblood and Cheese Sandwich as Brick, Boomer and Butch