Pravidelné obsadenie série 3

1. 

   Debi Derryberry

   Jimmy Neutron (voice)

2. 

   Jeffrey Garcia

   Sheen Estevez (voice)

3. 

   Rob Paulsen

   Carl Wheezer (voice)

Hosťujúce hviezdy 8

1. 

   Mark DeCarlo

   Hugh Neutron / Octopus Man (voice)

2. 

   Billy West

   Sam Melnick / Man (voice)

3. 

   Rob Paulsen

   Principal Willoughby (voice)

4. 

   Andrea Martin

   Ms. Fowl (voice)

5. 

   Megan Cavanagh

   Judy Neutron (voice)

6. 

   Carolyn Lawrence

   Cindy Vortex (voice)

7. 

   Crystal Scales

   Libby Folfax (voice)

8. 

   Frank Welker

   Goddard / Special Vocal Effects (voice)

Štáb 2