Cast:[]
Version 1[]
- Wakko as Casper
- Dot as Kathleen Kat Harvey
- Dr. Director as Mr. Rugg
- Beanie The Brain-Dead Bison as Paul Dibbs Plutzker
- Dr. Otto as Dr. James Harvey
- Hello Nurse as Carrgain
- Thaddeus Plotz as Stretch
- Pesto as Stinkie
- Flavio Hippo as Fatso
- and more
Version 2[]
- Yakko as Casper
- Dot as Kat "Kathleen" Harvey
- Slappy Squirrel as Carrigan Crittenden
- The Brain as Paul "Dibs" Plutzker
- Flavio Hippo as Dr. James Harvey
- Hello Nurse as Amelia Harvey
- Walter Wolf as Stretch
- Beanie the Brain-Dead Bison as Fatso
- Sid the Squid as Stinkie
- Dr. Otto ScratchNSniff as Crypt Keeper
- Mindy as Vic
- Minerva Mink as Amber
- Wakko as Nicky
- Ralph the Guard as Father
- Pinky as Spooky
- Katie Ka-Boom as Polli