The Ghostly Trio give Casper the Friendly Ghost a pill to make him as mean as they are.
| Actor | Role |
|---|---|
 Cecil RoyCasper (voice) (uncredited) | Casper (voice) (uncredited) |
 Sid RaymondGhost #1 (voice) (uncredited) | Ghost #1 (voice) (uncredited) |
 Jack MercerGhost #3 / Evil Casper (voice) (uncredited) | Ghost #3 / Evil Casper (voice) (uncredited) |
 Jackson BeckGhost #2 (voice) (uncredited) | Ghost #2 (voice) (uncredited) |