Suggestions by @kevindolan

Colleen O'Shaughnessey

as Miles “Tails” Prower in Sonic the Hedgehog 2

Andrew Kishino

as Shredder in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Eric Bauza

as Splinter in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Mae Whitman

as April O'Neil in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Josh Peck

as Casey Jones in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Sheamus

as Rocksteady in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

JB Smoove

as Bebop in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Kyle Mooney

as Michelangelo in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Seth Green

as Leonardo in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Adam DeVine

as Raphael in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Josh Brener

as Donatello in Teenage Mutant Ninja Turtles Halloween Special: Attack of the Killer Pumpkins

Josh Gad

as Oswald Cobblepot in Batman Cinematic Universe

Alfred Molina

as Tom Cat in Hanna-Barbera cinematic universe

Jeff Bergman

as Mildew Wolf in Hanna-Barbera cinematic universe

Maurice LaMarche

as Dum-Dum in Hanna-Barbera cinematic universe

Frank Welker

as Astro in Hanna-Barbera cinematic universe

Bobby Moynihan

as Yellow PInke in Hanna-Barbera cinematic universe

Frank Welker

as Scooby-Doo in Looney Tunes: Back in Action

Frank Weller

as Scooby Doo in Looney Tunes: Back in Action

Matthew Lillard

as Shaggy in Looney Tunes: Back in Action