Full cast of Scooby-Doo and Guess Who?

Frank Welker

Fred Jones / Scooby-Doo (voice)

52 episodes

Matthew Lillard

Shaggy Rogers (voice)

52 episodes

Grey DeLisle

Daphne Blake (voice)

52 episodes

Kate Micucci

Velma Dinkley (voice)

52 episodes

Mark Hamill

The Trickster (voice) / Mark Hamill (voice) / Joker (voice)

3 episodes

Billy West

Mr. Peebles (voice) / Ebb / Skip Gilroy (voice)

2 episodes

Phil LaMarr

Caddy / Golf Announcer (voice) / Madds Markson (voice)

2 episodes

John DiMaggio

Talent Agent / Crazy Karl / Baz Bozzington (voice) / Ghost of Abraham Lincoln / Jebb (voice)

2 episodes

Wanda Sykes

Wanda Sykes (voice)

1 episode

Ian James Corlett

Sherlock Holmes (voice)

1 episode

Ricky Gervais

Ricky Gervais (voice)

1 episode

Rachel Kimsey

Wonder Woman (voice)

1 episode

Penn Jillette

Penn Jillette (voice)

1 episode

Teller

Teller (voice)

1 episode

Jaleel White

Steve Urkel / Urkel-Bot (voice)

1 episode

Jim Gaffigan

Jim Gaffigan (voice)

1 episode

'Weird Al' Yankovic

'Weird Al' Yankovic (voice)

1 episode

Sia

Sia (voice)

1 episode

Kenan Thompson

Kenan Thompson (voice)

1 episode

Kevin Conroy

Batman (voice)

1 episode

Steven Weber

Alfred Pennyworth (voice)

1 episode

Whoopi Goldberg

Whoopi Goldberg (voice)

1 episode

Charlie Schlatter

The Flash (voice)

1 episode

George Takei

George Takei (voice)

1 episode

Halsey

Halsey (voice)

1 episode

Steve Buscemi

Steve Buscemi (voice)

1 episode

Jeff Dunham

Jeff Dunham / Walter (voice)

1 episode

Darci Lynne Farmer

Darci Lynne Farmer / Petunia (voice)

1 episode

Maddie Ziegler

Maddie Ziegler (voice)

1 episode

Jeff Foxworthy

Jeff Foxworthy (voice)

1 episode

Malcolm McDowell

Malcolm McDowell (voice)

1 episode

Jennifer Hale

Thorn (voice)

1 episode

Jane Wiedlin

Dusk (voice)

1 episode

Kimberly Brooks

Luna (voice)

1 episode

Christian Slater

Christian Slater (voice)

1 episode

Kacey Musgraves

Kacey Musgraves (voice)

1 episode

Morgan Freeman

Morgan Freeman (voice)

1 episode

Kristen Schaal

Kristen Schaal (voice)

1 episode

Joey Chestnut

Joey Chestnut (voice)

1 episode

Gigi Hadid

Gigi Hadid (voice)

1 episode

Alton Brown

Alton Brown (voice)

1 episode

Tim Gunn

Tim Gunn (voice)

1 episode

Tara Lipinski

Tara Lipinski (voice)

1 episode

Chloe Kim

Chloe Kim (voice)

1 episode

Laila Ali

Laila Ali (voice)

1 episode

Liza Koshy

Liza Koshy (voice)

1 episode

Macklemore

Macklemore (voice)

1 episode

Sandy Duncan

Sandy Duncan (voice)

1 episode

Alex Trebek

Alex Trebek (voice)

1 episode

Axl Rose

Axl Rose (voice)

1 episode

Jason Sudeikis

Jason Sudeikis (voice)

1 episode

Lucy Liu

Lucy Liu (voice)

1 episode

Sean Astin

Sean Astin (voice)

1 episode

Cher

Cher (voice)

1 episode

Jessica Biel

Jessica Biel (voice)

1 episode

Joseph Simmons

Reverend Run (voice)

1 episode

Billy Dee Williams

Billy Dee Williams (voice)

1 episode

Terry Bradshaw

Terry Bradshaw (voice)

1 episode

Carol Burnett

Carol Burnett (voice)

1 episode

Johnny Gilbert

Announcer (voice)

1 episode

Bill Nye

Bill Nye (voice)

1 episode

Neil deGrasse Tyson

Neil deGrasse Tyson (voice)

1 episode

Tom Kenny

Augie Anderson / 'Mudsy' Muddlemore / Sergeant Ghost (voice)

1 episode

Dee Bradley Baker

Jacques-Pierre / Pierre-Jacques / Monster (voice)

1 episode

Chris Paul

Chris Paul (voice)

1 episode

David Kaye

Angry Chef / Poetry Slam Promoter / Gator Man Monster (voice)

1 episode