Mystery, Inc. heads to Blowout Beach for a real swinging beach party when the Ghost Pirates threaten to harsh the good vibes.
| Actor | Role |
|---|---|
 Natalie LanderKrissy Holdout (voice) | Krissy Holdout (voice) |
 Kate MicucciVelma Dinkley (voice) | Velma Dinkley (voice) |
 Matthew LillardShaggy Rogers (voice) | Shaggy Rogers (voice) |
 Grey DeLisleDaphne Blake (voice) | Daphne Blake (voice) |
 Iqbal ThebaDr. Najib (voice) | Dr. Najib (voice) |
 Frank WelkerScooby-Doo / Fred Jones (voice) | Scooby-Doo / Fred Jones (voice) |
 Kate HigginsBrenda (voice) | Brenda (voice) |
 Hynden WalchMitzi Capaletto (voice) | Mitzi Capaletto (voice) |
 Jeff BennettDeputy / Museum Guide (voice) | Deputy / Museum Guide (voice) |
 Kevin Michael RichardsonSheriff (voice) | Sheriff (voice) |
 Tom KennyRob Holdout (voice) | Rob Holdout (voice) |
 Jack McBrayerPolice Officer (voice) | Police Officer (voice) |
 Fred TatascioreDwight Monkfish (voice) | Dwight Monkfish (voice) |
 Josh KeatonTommie / Chad Holdout (voice) | Tommie / Chad Holdout (voice) |