Suggestions by @thecrimsonpaw

Richard Steven Horvitz

as Zim in Invader Zim

Voltar

as Characters Already in the MultToonVerse in What Should Come in the MultToonVerse?

League of Super Evil

as MultToonVerse in Make Your Own Universe

Scooby-Doo! Mystery Incorporated

as MultToonVerse in Make Your Own Universe

Invader Zim

as Next Project: in The Super Mario Bros. Super Movie

Chris Houghton

as “The Kongs” in The Super Mario Bros. Super Movie

Diddy Kong

as “The Kongs” in The Super Mario Bros. Super Movie

Nicholas Hoult

as “The Kongs” in The Super Mario Bros. Super Movie

Jaleel White

as "The Blue Hedgehog." in The Super Mario Bros. Super Movie

Sonic (AoSTH)

as "The Blue Hedgehog." in The Super Mario Bros. Super Movie

Spoiler

as "The Blue Hedgehog." in The Super Mario Bros. Super Movie

Taika Waititi

as Director in The Super Mario Bros. Super Movie

Donkey Kong (DK Country TV Show)

as “The Kongs” in The Super Mario Bros. Super Movie

Spoiler

as “The Kongs” in The Super Mario Bros. Super Movie

Jason Ritter

as Toad in The Super Mario Bros. Super Movie

Dana Gaier

as Princess Peach in The Super Mario Bros. Super Movie

Zachary Levi

as Luigi in The Super Mario Bros. Super Movie

Ewan McGregor

as Mario in The Super Mario Bros. Super Movie

The Super Mario Bros. Super Show!

as Next Project: in League Of Super Evil

Tom McGrath

as Director in League Of Super Evil