Susan Blakeslee Wanda Voice Daran Norris Cosmo Voice Tara Strong Timmy Turner Voice Jim Ward Chet Ubetcha Voice Carlos Alazraqui Denzel Crocker Voice Dionne Quan Trixie Tang Guest Voice Dee Bradley Baker Fairy Judge , Elmer Guest Voice Frankie Muniz Chester McBadbat Guest Voice Ibrahim Muhammad A.J. Guest Voice Butch Hartman Bus Driver , Protozoa 1 , Cow , Rocket Scientist , Tinklebell , Anti-body 1 Guest Voice, Director, Writer Grey DeLisle Vicky , Female Protozoa , Female Stomach Flu Guest Voice Rob Paulsen Tour Guide , Walt Kidney , Pettiness , Male Stomach Flu , Physicist Guest Voice Larry Leichliter Director Steve Marmel Writer Mike Bell Writer