A crossover between “The Fairly OddParents” and “The Adventures of Jimmy Neutron, Boy Genius” has animated kid heroes Timmy and Jimmy working out their differences and teaming up to defeat evil, including a destructive force of their own making. Jimmy Neutron: Debi Derryberry. Timmy Turner: Tara Strong. Wanda/Mrs. Turner: Susan Blakeslee. Cosmo/Mr. Turner: Daran Norris. Carl: Rob Paulsen. Sheen: Jeffrey Garcia.