Kadro (20)
Zack ShadaPenn (voice)
David HornsbyFanboy / Kid #2 (voice)
Nancy CartwrightChum-Chum / Kid #1 (voice)
Don LaFontaineAnnouncer (voice)
Stephen RootLance (voice)
Bobcat GoldthwaitZoopie (voice)
Keone YoungFlashback Lance / Flashback Zoopie (voice)
Stephen StantonMr. Frank (voice)
Robert CostanzoBossman (voice)
John MarianoLeonardo DaVinci (voice)
Rodger BumpassLemurman (voice)Lynne MacleanTabby's Mom (voice)
June ForayMall Walker / Old Man #1 / Man at Garbage Can (voice)
Rob PaulsenSolomon Fix (voice)
Kari WahlgrenSparkles / Mom / Leprechaun (voice)
Tara StrongBeth / New Alien (voice)
Dan FinnertyWallo (voice)
Noah NelsonProfessor Brain Dog 7 (voice)
Polly Lou LivingstonHigh Five Alien (voice)
Teresa GanzelLulu (voice)