Suggestions by @jdfitzgerald

Ian McKellen

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

Nicky Jones

as Bowser Jr. in The Perfect Nintendo Animated Universe!

Jim Carrey

as Dr Eggman in The Perfect Nintendo Animated Universe!

Michael Keaton

as King Boo in The Perfect Nintendo Animated Universe!

Christopher Lloyd

as Professor E. Gadd in The Perfect Nintendo Animated Universe!

John Cleese

as Toadsworth in The Perfect Nintendo Animated Universe!

Kristen Schaal

as Toadette in The Perfect Nintendo Animated Universe!

Kevin Hart

as Diddy Kong in The Perfect Nintendo Animated Universe!

Tim Curry

as King K. Rool in The Perfect Nintendo Animated Universe!

Emma Watson

as Daisy in The Perfect Nintendo Animated Universe!

Danny DeVito

as Wario in The Perfect Nintendo Animated Universe!

Jeff Goldblum

as Waluigi in The Perfect Nintendo Animated Universe!

Makiko Ohmoto

as Kirby in The Perfect Nintendo Animated Universe!

John C. Reilly

as King Dedede in The Perfect Nintendo Animated Universe!

Idris Elba

as Meta Knight in The Perfect Nintendo Animated Universe!

Daisy Ridley

as Zelda in The Perfect Nintendo Animated Universe!

Ralph Fiennes

as Ganondorf in The Perfect Nintendo Animated Universe!

Taron Egerton

as Link in The Perfect Nintendo Animated Universe!

Timothy Dalton

as Toadsworth in How bowser stole Christmas

Charlie Day

as Percy in Gordon takes charge