My Little Pony/Phineas and Ferb

Cast: More ideas?
 * Pinkie Pie as Phineas (their names start with 'P')
 * Derpy Hooves as Ferb (neither of them talk much)
 * Rarity as Candace
 * Gummy as Perry (they're both pets whose names start with 'Y')
 * Discord as Dr. Doofenshmirtz (their names start with 'D')
 * Rainbow Dash as Vanessa
 * Fluttershy as Isabella
 * Spike as Baljeet
 * Applejack as Buford
 * Prince Blueblood as Jeremy
 * Twilight Sparkle as Stacy
 * Princess Celestia as Major Monogram
 * Princess Luna as Carl