Cast. Spike as Phineas. Butch (From The Powerpuff Girls) as Ferb. Twilight Sparkle as Isabella. Big Macintosh as Lawrence Princess Celestia as Linda Fluttershy as Candace. Angel as Meap. Rainbow Dash as Stacy. Rarity as Mindy. Prince Blueblood as Jeremy. Soarin' as Coltrane. Apple Bloom as Blossom (Powerpuff Girls) Sweetie Belle as Bubbles (Powerpuff Girls) Scootaloo as Buttercup (Powerpuff Girls) Cheerilee as Vivian. Derpy Hooves as Melissa. The Great and Powerful Trixie as Ginger. Diamond Tiara as Suzy. Nightmare Moon as Professor Poofenplotz. Discord as Dr Doofenshmirtz. Dr Hooves as Major Monogram.