Ooblar

Libby Folfax

Gus

Ultra Lord

Nick Dean

Guard

King Goobot

Goddard

Sheen Estevez

Chris

Carl Wheezer

Octapuke Kid

Poultra

Yokian Incubator Operator

Little Girl

Judy Neutron

Cindy Vortex

Screamer

Ms. Fowl

Norad Officer

Jimmy Neutron

Bobby

Hyperactive Kid

Zachery

Sheen's Dad

Hugh Neutron