Fred Jones / Scooby-Doo (voice)

Frank Welker

Chris Paul

Chris Paul

Daphne Blake

Grey Griffin

Shaggy Rogers

Matthew Lillard

Velma Dinkley

Kate Micucci

Guest Voice

"Weird Al" Yankovic

Voice

Charlie Schlatter

Voice

Jeff Bennett

Voice

Dee Bradley Baker

Himself

George Takei

Wonder Woman (voice)

Rachel Kimsey

Wanda Sykes (voice)

Wanda Sykes

Voice

Kimberly Brooks

Ricky Gervais (voice)

Ricky Gervais

Jeff Dunham / Walter

Jeff Dunham

Sia (voice)

Sia

Themselves

Penn & Teller

Voice

Jeff Foxworthy

Guest Voice

Whoopi Goldberg

Steve Urkel / Urkel-Bot (voice)

Jaleel White

Voice

Maddie Ziegler

Voice

Steve Buscemi

Kenan Thompson (voice)

Kenan Thompson

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

Mark Hamill

Batman (voice)

Kevin Conroy

Jim Gaffigan (voice)

Jim Gaffigan

Herself

Halsey

Darci Lynne Farmer / Petunia

Darci Lynne Farmer

Voice

Kari Wahlgren

Voice

John Mariano

Voice

Jennifer Hale

Voice

Jill Talley

Voice

Fred Tatasciore

Sherlock Holmes (voice)

Ian James Corlett

Voice

JB Blanc

Voice

Keith Ferguson

Voice

David Kaye

Voice

Kevin Michael Richardson

Voice

Stephen Stanton

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

Phil LaMarr

Voice

Bill Nye

Voice

Tom Kenny

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

Billy West

Voice

Christian Slater

Voice

Jess Harnell

Voice

Steven Weber

Ghost of Abraham Lincoln / Jebb (voice) / Talent Agent

John DiMaggio

Voice

Neil deGrasse Tyson

Chris Colfer

Penn Jillette (voice)

Penn Jillette

Teller (voice)

Teller

'Weird Al' Yankovic (voice)

'Weird Al' Yankovic