Suggestions by @desfitzgerald

Roger Craig Smith

as Henry in The Railway Series

Tom Kenny

as Thomas in The Railway Series

Rob Paulsen

as Edward in The Railway Series

Hank Azaria

as Ludwig Von Koopa in Super Mario Bros

Wally Wingert

as Lemmy Koopa in Super Mario Bros

Tress MacNeille

as Wendy O.Koopa in Super Mario Bros

John DiMaggio

as Roy Koopa in Super Mario Bros

Paul Rudd

as Larry Koopa in Super Mario Bros

Scott McNeil

as King Bob Omb in Super Mario Bros

Dee Bradley Baker

as Boo in Super Mario Bros

Keegan-Michael Key

as Captain Toad in Super Mario Bros

Grey DeLisle

as Mother Penguin in Super Mario Bros

Steve Blum

as Bullet Bill in Super Mario Bros

Martin Short

as Lakitu in Super Mario Bros

Billy West

as Koopa Troopa in Super Mario Bros

James Franco

as Funky Kong in Super Mario Bros

Jeff Goldblum

as Waluigi in Super Mario Bros

Kristen Schaal

as Toadette in Super Mario Bros

Tara Strong

as Toadette in Super Mario Bros

Jason Sudeikis

as King Boo in Super Mario Bros