Suggestions by @jdfitzgerald

Steve Carell

as Sir Handel in Thomas and Friends (If it was owned by Hasbro)

Alan Cumming

as Duncan in Thomas and Friends (If it was owned by Hasbro)

Simon Pegg and Nick Frost

as Iron Arry & Iron Bert in Thomas and Friends (If it was owned by Hasbro)

Malcolm McDowell

as Diesel 10 in Thomas and Friends (If it was owned by Hasbro)

Peter Cullen

as Gordon in Thomas and Friends (If it was owned by Hasbro)

Charlie Day

as Luigi Mario in Super Mario Bros.: The New Animated Series (Version 4)

Ron Perlman

as Boswer in Super Mario Bros.: The New Animated Series (Version 4)

Tom Kenny

as Diddy Kong in Super Mario Bros.: The New Animated Series (Version 4)

Bill Fagerbakke

as Donkey Kong in Super Mario Bros.: The New Animated Series (Version 4)

Simon Pegg

as Toadbert in Super Mario Bros.: The New Animated Series (Version 4)

Danny DeVito

as Mario Mario in Super Mario Bros.: The New Animated Series (Version 4)

Richard Hammond

as Oliver in Thomas the Tank Engine & Friends

Ralph Fiennes

as Ganondorf in The New Super Mario Bros. Super Show!

Sanae Suzaki

as Boos in Luigi’s Mansion

Helena Bonham Carter

as Hellen Gravely in Luigi’s Mansion

Kate Micucci

as Princess daisy in Mario Kart: Second Gear

Seth Rogen

as Donkey Kong in Mario Kart: Second Gear

Jack Black

as Bowser in Mario Kart: Second Gear

Steve Carell

as Sir Handel in Thomas the Tank Engine & Friends (2021)

Ron Cook & Sophia Myles

as Duke and duchess of boxford in The shining time station movie