Frank Welker
Scooby-Doo / Fred Jones (voice)
52 episodes
Grey DeLisle
Daphne Blake (voice)
52 episodes
Mindy Cohn
Velma Dinkley (voice)
52 episodes
Matthew Lillard
Shaggy Rogers (voice)
52 episodes
Patrick Warburton
Sheriff Bronson Stone (voice)
34 episodes
Gary Cole
Mayor Fred Jones Sr. / Motorcycle Cop (voice) / Mayor Fred Jones Sr. / Foreman (voice) / Mayor Fred Jones Sr. / Black Knight (voice) / Mayor Fred Jones Sr. / Paramedic #2 (voice) / Mayor Fred Jones Sr. (voice)
23 episodes
Lewis Black
Mr. E / Ricky Owens (voice) / Mr. E (voice)
23 episodes
Vivica A. Fox
Angel Dynamite (voice) / Cassidy Williams (voice)
20 episodes
Udo Kier
Professor Pericles (voice)
17 episodes
Kate Higgins
Principal Quinlan (voice) / Mayor Janet Nettles (voice)
17 episodes
Frances Conroy
Mrs. Dinkley (voice) / Angie Dinkley (voice)
15 episodes
Tia Carrere
Amy (voice) / Judy Reeves (voice)
14 episodes
Tim Matheson
Brad Chiles (voice)
13 episodes
Mitch Watson
Ethan / Policeman (voice) / Male Parent #2 / Mr. Gabodoglophordia (voice) / Dylan / Teen (voice) / Dylan (voice) / Farmer (voice)
12 episodes
Kath Soucie
Nan Blake / Female Tourist (voice) / Female Parent #1 / Female Parent #2 (voice) / Nan Blake (voice)
11 episodes
Linda Cardellini
Marcie 'Hot Dog Water' Fleach (voice) / Marcie 'Hot Dog Water' Fleach / Airport PA (voice) / Marcie 'Hot Dog Water' Fleach / Dark Lillith (voice)
9 episodes
John O'Hurley
Skipper Shelton (voice)
8 episodes
Dee Bradley Baker
Headless Horror (voice) / Kriegstaffebot (Voice) / Officer Johnson (voice) / Junk (voice) / Gene Shepherd (voice) / Slime Mutant / Franklin Fruitmeir (voice)
7 episodes
Maurice LaMarche
Vincent Van Ghoul (voice)
6 episodes
Tony Cervone
Gary / Referee #2 (voice) / Gary (voice)
6 episodes
Casey Kasem
Colton Rogers (voice)
5 episodes
Fred Tatasciore
The Phantom (voice) / Rusty Gnales (voice) / Workman #2 (voice) / Gluten Demon (voice) / Demon Dog (voice)
5 episodes
James Arnold Taylor
George Avocados (voice) / George Avocados / Rung Ladderton / Teen Driver (voice) / Randy (voice)
5 episodes
Troy Baker
Commercial Announcer (voice) / Curator Vronsky / Dispatcher (voice) / Krod (voice) / Blue Falcon (voice) / Dreamweaver (voice)
5 episodes
Amy Acker
Nova (voice)
4 episodes
Jeff Bennett
Gary / Dougal McGuiness (voice) / Gary (voice) / Professor Emmanuel Raffalo / Male Tourist (voice) / Dougal McGuiness (voice)
4 episodes
Kimberly Brooks
Cassidy Williams (voice) / Luna (voice) / Luna / Woman (voice)
4 episodes
Jennifer Hale
Thorn (voice) / Delilah Blake / Mom (voice) / Daisy Blake (voice)
4 episodes
Carlos Alazraqui
Piranha-Goat / Deputy Bucky / Nitro Wleinski (voice) / Ernesto (voice) / Krampus (voice)
4 episodes
Tom Kenny
Auctioneer (voice) / Funky Phantom (voice) / Broccoli Head/Mr. Baywosenthal/Striped Kid/Child #8 (voice) / Max Minner / Jax Minner (voice)
4 episodes
David Kaye
Argus Fentonpoof (voice) / Dad (voice)
4 episodes
Richard McGonagle
Ed Machine (voice)
4 episodes
Matt Lanter
Baylor Hotner (voice)
3 episodes
Clancy Brown
Hebediah Grim (voice) / Evil Entity (voice)
3 episodes
Christian Lanz
Fernando El Aguirre (voice) / Professor Enrique Andelusossa (voice)
3 episodes
Mindy Sterling
Dean Fenk (voice) / Frau Abigail Gluck (voice)
3 episodes
Beth Tapper
Brenda (voice)
3 episodes
James Patrick Stuart
Dr. Rick Spartan (voice) / Traveler O'Flaherty (voice) / Dr. Rick Spartan
3 episodes
Kevin Michael Richardson
Foog (voice) / Dan Fluunk (voice) / Hulking Red (voice)
3 episodes
Kevin Dunn
Dale Dinkley / Workman #1 (voice) / Dale Dinkley (voice) / Garden Manager (voice)
3 episodes
Scott Menville
Ricky Owens (voice)
2 episodes
Harlan Ellison
Self (voice)
2 episodes
Michael J. Anderson
Professor Horatio Kharon (voice)
2 episodes
John DiMaggio
Grady Gator / Delivery Guy (voice) / Grady Gator (voice)
2 episodes
Billy West
Gunther Gator (voice) / Randy Warsaw (voice)
2 episodes
Jane Wiedlin
Dusk (voice)
2 episodes
Chris Hardwick
Maxwell (voice) / Evallo Von Meanskrieg (voice)
2 episodes
Quinton Flynn
Daniel Prezette / Fantzee Pantz / Gus Boggs (voice) / Rude Boy (voice)
2 episodes
Isabella Acres
Mary Anne Gleardan (voice) / Mary-Ann Geerdon / Tiffany / Child #4 / Child #5 (voice)
2 episodes
Mark Hamill
Crybaby Clown (voice)
2 episodes
James Hong
Chen / Red Wizard (voice) / Chen (voice)
2 episodes
Greg Ellis
Cachinga (voice) / Charles 'Cachinga' Wheatlesby (voice)
2 episodes
Cree Summer
Paige Kruller (voice) / Lady Marmalade (voice)
2 episodes
Eric Bauza
Eager Clerk (voice) / Dr. Zin (voice)
2 episodes
Hynden Walch
Alice May (voice)
2 episodes
Paul Rugg
Kelsepsian (voice) / Dr. Portillo
2 episodes
Jeffrey Combs
H.P. Hatecraft (voice)
2 episodes
Beverly D'Angelo
Mom (voice) / Sheila Altoonian (voice)
2 episodes
Nolan North
Brad Chiles (voice)
2 episodes
Kari Wahlgren
Judy Reeves (voice)
2 episodes
Julie Bowen
Marion Spartan (voice)
1 episode
Ben McKenzie
Odnarb (voice)
1 episode
Jim Cummings
Captain Caveman (voice)
1 episode
Rick D. Wasserman
Lord Infernicus / Boo (voice)
1 episode
Tricia Helfer
Aphrodite / Amanda Smyth (voice)
1 episode
James Marsters
Dandy Highwayman (voice)
1 episode
Clyde Kusatsu
Picnicker (voice)
1 episode
Christopher Corey Smith
Race Bannon (voice)
1 episode
Laraine Newman
Granny Snaggletooth (voice)
1 episode
Charles Shaughnessy
Ned Fussbuster (voice)
1 episode
Phil LaMarr
Melvin Keisterbaum (voice)
1 episode
Jason Marsden
Horbert Feist (voice)
1 episode
John Billingsley
Dr. Henklefust (voice)
1 episode
Jim Rash
J.R. Kipple (voice)
1 episode
Roz Ryan
Gorgeous G (voice)
1 episode
George Takei
Mr. Wang / White Wizard (voice)
1 episode
Stephanie Sheh
Mai Le (voice)
1 episode
Gary Anthony Williams
Dr. Cavanaugh (voice)
1 episode
Powers Boothe
Dead Justice (voice)
1 episode
Florence Henderson
Ruby Stone (voice)
1 episode
David Faustino
Bud Coleman (voice)
1 episode
George Segal
Peter Trickell (voice)
1 episode
Zach Callison
Arthur Baywosenthal / Child #6 / Child #7 (voice)
1 episode
Lloyd Sherr
Lord Barry (voice)
1 episode
Jeffrey Tambor
Gill Littlefoot (voice)
1 episode
Audrey Wasilewski
Queen Amanda (voice)
1 episode
Daryl Sabara
Jason (voice)
1 episode
Jessica Walter
Jason's Mom (voice)
1 episode
Crispin Freeman
Ben (voice)
1 episode
Dave Allen
Rick Yantz (voice)
1 episode
Joe Holt
Hugh Dederdee (voice)
1 episode
Marion Ross
Grandma Moonbeam (voice)
1 episode
Phil Idrissi
Gabtraf (voice)
1 episode
Dwight Schultz
Older Danny Darrow (voice)
1 episode
Will Shadley
Younger Danny Darrow (voice)
1 episode
David Juskow
Harry Schnesle-Boysen (voice)
1 episode
April Winchell
Weena (voice)
1 episode
Daran Norris
Skipper's Brother (voice)
1 episode
Rob Paulsen
Winslow Fleach (voice)
1 episode
David Markus
Young Man / Ben (voice)
1 episode
Martha Quinn
Martha Quinn (voice)
1 episode
