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Peter FramptonHugh Neutron (singing voice)
Mark DeCarloHugh Neutron / Mr. Vortex (voice)
Crystal ScalesLibby Folfax / Libby's Brother (voice)
Billy WestSam Melnick / Corky Shimatzu (voice)
Frank WelkerGoddard / Wendel / Special Vocal Effects (voice)
Candi MiloNick Dean (voice)
Andrea MartinMs. Fowl (voice)
Megan CavanaghJudy Neutron (voice)
Carolyn LawrenceCindy Vortex (voice)
