Jacob Williamson: Boy Genius

• Jimmy Neutron - Jacob Williamson
• Carl Wheezer - Unnamed
• Sheen Estevez - Unnamed
• Cindy Vortex - Jacob Williamson's Unnamed Girlfriend
• Libby Folfax - Unnamed
• Nick Dean - Unnamed
• King Goobot - Unnamed
• Ms. Fowl - Unnamed
• Judy Neutron - Hayley Doyle
• Hugh Neutron - Joe Williamson (or Jai Butcher)
• Goddard - Toby