Perry The Platypus, Where are you! is an Episode of Phineas and Ferb and Its Simlair to Scooby Doo.Its About When Phineas ( Shaggy) and Ferb ( Fred) has Lost there Pet Platypus Perry ( Scooby Doo). Now with the help of there friends Issabella (Velma) and Emily (Daphhe) go on One Big Case Stop The Evil Dr.Doofenshritz (The Dark Specter) from steling Perry The Platypus.