Nick Palatas as Shaggy

Hayley Kiyoko as Velma

Frank Welker as Scooby-Doo (voice)

Robbie Amell as Fred

Kate Melton as Daphne

Benita Ha as Mom

Shawn Macdonald as Principal Deedle

C. Ernst Harth as Janitor

Garry Chalk as Vice Principal Grimes

Kurt Evans as Dad

Kira Clavell as Reporter

Lorena Gale as Librarian

Christopher Attadia as Teen Male In Car

Jordana Largy as Teen Female In Car

Leah James as Prudence Prufrock

David Hurtubise as Mr. Pupperman

Dee Jay Jackson as Bus Driver

Brian J. Sutton as Ezekial Gallows

Al Rodrigo as Ezekial Gallows (voice)

Devin Thomas as