S1E30 · Papa Cool

Debi Derryberry

Jimmy Neutron (voice)

Jeffrey Garcia

Sheen Estevez (voice)

Rob Paulsen

Carl Wheezer (voice)

Peter Frampton

Hugh Neutron (singing voice)

Mark DeCarlo

Hugh Neutron / Mr. Vortex (voice)

Crystal Scales

Libby Folfax / Libby's Brother (voice)

Billy West

Sam Melnick / Corky Shimatzu (voice)

Frank Welker

Goddard / Wendel / Special Vocal Effects (voice)

Candi Milo

Nick Dean (voice)

Andrea Martin

Ms. Fowl (voice)

Megan Cavanagh

Judy Neutron (voice)

Carolyn Lawrence

Cindy Vortex (voice)