Main Characters Cindy Vortex 79 main appearances James Isaac 'Jimmy' Neutron 79 main appearances Goddard 79 main appearances Sheen Estevez 79 main appearances Hugh Neutron 79 main appearances Carl Wheezer 79 main appearances Judy Neutron 61 main appearances Libby Fallfax 58 main appearances Ms. Fowl 57 main appearances Nick Dean 39 main appearances