Suggestions by @seanaustintandog

Kevin Afghani

as Luigi (Later Seasons) in The Super Mario Bros. - The Animated Series

Score: +1

Jim Carrey

as Waluigi in The Super Mario Bros. Movie 2

Score: 0

Pedro Pascal

as Wario in The Super Mario Bros. Movie 2

Score: +1

Amy Poehler

as Dixie Kong in The Super Mario Bros. Movie 2

Score: -1

Dwayne Johnson

as Funky Kong in The Super Mario Bros. Movie 2

Score: 0

Jacob Tremblay

as Lemmy Koopa in The Super Mario Bros. Movie 2

Score: +1

Brian Tyree Henry

as Roy Koopa in The Super Mario Bros. Movie 2

Score: +1

John Cena

as Jakob Toretto in Untitled Fast & Furious Spy Racers sequel

Score: +1

Josh Brener

as Larry Koopa in The Super Mario Bros. Movie 2

Score: +2

Kenneth W. James

as NYPD Officer in The Super Mario Bros. Movie 2

Score: +2

Jenny Slate

as Wendy O. Koopa in The Super Mario Bros. Movie 2

Score: +1

Dwayne Johnson

as Funky Kong in Donkey Kong Country: The Movie

Score: +2

John DiMaggio

as Morton Koopa Jr. in The Super Mario Bros. Movie 2

Score: +2

Wilmer Valderrama

as Iggy Koopa in The Super Mario Bros. Movie 2

Score: +1

Pedro Pascal

as Wario in The Super Mario Bros. Movie 2

Score: +1

David J. Goldfarb

as Ludwig in The Super Mario Bros. - The Animated Series

Score: +1

Carlee McManus

as Lemmy in The Super Mario Bros. - The Animated Series

Score: +1

Ryan Higgins

as Iggy in The Super Mario Bros. - The Animated Series

Score: +1

Ashley Flannegan

as Wendy in The Super Mario Bros. - The Animated Series

Score: +1

David Cooke

as Morton in The Super Mario Bros. - The Animated Series

Score: +1