Grandpa Space Ghost, whose physique is identical to his grandson's and whose voice is identical to WCW wrestler Macho Man Randy Savage, gives an 'Oooo-Yeeaaahhh!' performance despite being clubbed with a chair by Zorak.
| Name | Type | Role | |
|---|---|---|---|
| Andy Merrill | Guest Star | ||
| Rob Zombie | Guest Star | ||
| Raven-Symoné | Guest Star | ||
| Randall Poffo | Guest Star |