Character Name : Scooby-Doo / Fred Jones / Self

Original Name : Frank Welker

Gender : Male

Character Name : Norville 'Shaggy' Rogers / Self - Voice of "Shaggy"

Original Name : Matthew Lillard

Gender : Male

Character Name : Daphne Blake / Self - Voice of "Daphne"

Original Name : Grey DeLisle

Gender : Female

Character Name : Velma Dinkley / Self - Voice of "Velma"

Original Name : Kate Micucci

Gender : Female

Character Name : Janel Parrish - Host

Original Name : Janel Parrish

Gender : Female

Character Name : Self - Animation Historian and Author

Original Name : Jerry Beck

Gender : Male

Character Name : Self - Director and Producer, "The Simpsons"

Original Name : David Silverman

Gender : Male

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

Original Name : Seth Green

Gender : Male

Character Name : Self - Director, "Scoob!" / Showrunner, "Mystery Incorporated"

Original Name : Tony Cervone

Gender : Male

Character Name : Self - Animator, Historian

Original Name : Tom Sito

Gender : Male

Character Name : Self - Hanna-Barbera Co-Founder (archive footage)

Original Name : Joseph Barbera

Gender : Male

Character Name : Producer Bryn

Original Name : Mary Lynn Rajskub

Gender : Female

Character Name : Bram Penobscot - Scooby's Vocal Coach

Original Name : Baron Vaughn

Gender : Male

Character Name : Shaggy Rogers (voice) (archive footage)

Original Name : Casey Kasem

Gender : Male

Character Name : Batman - Concerned Citizen (voice)

Original Name : Diedrich Bader

Gender : Male

Character Name : Self - Singer, Songwriter, Accordionist

Original Name : "Weird Al" Yankovic

Gender : Male

Character Name : Olivia Liang - Shaggy's Martial Arts Trainer

Original Name : Olivia Liang

Gender : Female

Character Name : Costume Designer Carter

Original Name : Karamo Brown

Gender : Male

Character Name : Self - Showrunner, "Mystery Incorporated"

Original Name : Mitch Watson

Gender : Male

Character Name : Lazlo the Mechanic

Original Name : Cheri Oteri

Gender : Female

Character Name : Arlo Davidsonman - Team Scooby

Original Name : Brendan Jennings

Gender : Male

Character Name : Snow Ghost

Original Name : Vadym Krasnenko

Gender : Male

Character Name : Additional Voices (voice)

Original Name : Lindsey Alena

Gender : Male

Character Name : Additional Voices (voice)

Original Name : Dominic Catrambone

Gender : Male

Character Name : Additional Voices (voice)

Original Name : Fred Tatasciore

Gender : Male