Suggestions by @kevindolan

Rick Zieff

as Spike Bulldog in Smg4: Tom Gets Bullied

Jeff Bergman

as Sylvester in Smg4: Tom Gets Bullied

Frank Welker

as Garfield in Smg4: Tom Gets Bullied

Kevin Michael Richardson

as Barney Rubble in Smg4: Tom Gets Bullied

Eric Bauza

as Woody Woodpecker in Smg4: Sylvester The Psychic Cat

Eric Goldberg (animator)

as Marvin The Martian in Meta Runner Season 4: The Bonus Adventure

Vanessa Marshall

as Poison Ivy in Newcomers for MultiVersus

John DiMaggio

as Aquaman in Newcomers for MultiVersus

Dragon Tales

as PBS Kids in Kids Channels

Hey Arnold!

as Nickelodeon in Kids Channels

Lorenzo Music

as Garfield in Smg4: Tom’s Big Party

Clumsy Smurf

as Smurfs in Best Character by Franchise

Bugs Bunny

as Looney Tunes in Best Character by Franchise

Kermit the Frog

as The Muppets in Best Character by Franchise

Big Bird

as Sesame Street in Best Character by Franchise

Goofy

as Mickey Mouse in Best Character by Franchise

Yakko Warner

as Animaniacs in Best Character by Franchise

David Phillips

as Mario in Smg4: Team Battle Royal

Luke Lerdwichagul

as Smg4 in Smg4: Team Battle Royal

Kaiji Tang

as Tom Cat in Smg4: Team Battle Royal