Carl Wheezer (voice) (76 Episodes)

Jimmy Neutron (voice) (76 Episodes)

Sheen Estevez (voice) (76 Episodes)

Cindy Vortex (voice) (63 Episodes)

Goddard / Special Vocal Effects (voice) (47 Episodes)

Libby Folfax (voice) (37 Episodes)

Hugh Neutron (voice) (43 Episodes)

Judy Neutron (voice) (25 Episodes)

Ms. Fowl (voice) (44 Episodes)

Nick Dean (voice) (17 Episodes)

Sam Melnick (voice) (9 Episodes)

Bolbi (voice) (7 Episodes)

Ultra Lord (voice) (2 Episodes)

Professor Calamitous (voice) (7 Episodes)

Travoltron/Barbarino (voice) (3 Episodes)

Nanobot #2 (voice) (3 Episodes)

Betty Quinlan (voice) (5 Episodes)

Head Monk (voice) (1 Episodes)

Zix / Ticket Taker (voice) (2 Episodes)

Mr. Estevez (voice) (4 Episodes)

Tee (voice) (3 Episodes)

Beautiful Gorgeous (voice) (3 Episodes)

Sally (voice) (1 Episodes)

Nanobot #1 (voice) (2 Episodes)

Coach Gruber (voice) (3 Episodes)

Brobot (voice) (2 Episodes)

Jet Fusion (voice) (2 Episodes)

Commander Baker (voice) (2 Episodes)

Granny Neutron (voice) (2 Episodes)

Master Hong / Ninja (voice) (1 Episodes)

Junkman (voice) (2 Episodes)

Grandma Taters (voice) (2 Episodes)

You Yee / Elderly Monk / Ninja (voice) (1 Episodes)

Hugh Neutron (singing voice) (1 Episodes)

Peggy Tsu (voice) (1 Episodes)

Dean Cain (voice) (1 Episodes)

Quentin Smithee (voice) (1 Episodes)

Giggles the Clown (voice) (1 Episodes)

Santa Claus (voice) (1 Episodes)

Announcer (voice) (1 Episodes)

Seymour / Student #3 (voice) (1 Episodes)

Annabelle / Aunt Kari / Great Aunt Amanda (voice) (1 Episodes)

Buford / Reporter (voice) (1 Episodes)

Singer (voice) (1 Episodes)