Scooby-Doo / Fred Jones / Self

Norville 'Shaggy' Rogers / Self - Voice of "Shaggy"

Daphne Blake / Self - Voice of "Daphne"

Velma Dinkley / Self - Voice of "Velma"

Janel Parrish - Host

Self - Animation Historian and Author

Self - Director and Producer, "The Simpsons"

Self - Actor, "Scooby-Doo 2: Monsters Unleashed"

Self - Director, "Scoob!" / Showrunner, "Mystery Incorporated"

Self - Animator, Historian

Self - Hanna-Barbera Co-Founder (archive footage)

Producer Bryn

Bram Penobscot - Scooby's Vocal Coach

Shaggy Rogers (voice) (archive footage)

Batman - Concerned Citizen (voice)

Self - Singer, Songwriter, Accordionist

Olivia Liang - Shaggy's Martial Arts Trainer

Costume Designer Carter

Self - Showrunner, "Mystery Incorporated"

Lazlo the Mechanic

Arlo Davidsonman - Team Scooby

Snow Ghost

Additional Voices (voice)

Additional Voices (voice)

Additional Voices (voice)