Suggestions by @nathanholmes

Jon Heder

as Napoleon Bonafrog in Teenage Mutant Ninja Turtles

Dominic Purcell

as Muckman in Teenage Mutant Ninja Turtles

Cameron Monaghan

as Mondo Gecko in Teenage Mutant Ninja Turtles

Keith David

as Leatherhead in Teenage Mutant Ninja Turtles

Jessica Henwick

as Karai Saki/Yoshi in Teenage Mutant Ninja Turtles

David Tennant

as Fugatoid in Teenage Mutant Ninja Turtles

Paul Bettany

as Monkey Brains in Teenage Mutant Ninja Turtles

Scott Adkins

as Bishop in Teenage Mutant Ninja Turtles

Taron Egerton

as Casey Jones in Teenage Mutant Ninja Turtles

Ken Watanabe

as Splinter in Teenage Mutant Ninja Turtles

Karen Gillan

as April O'Neil in Teenage Mutant Ninja Turtles

Sean Astin

as Raphael in Teenage Mutant Ninja Turtles

Rob Paulsen

as Donatello in Teenage Mutant Ninja Turtles

Captain Hook (Disney character)

as Best Cartoon Villain in Best & Worst of Cartoons

Arcee (Transformers)

as Best Cartoon Crush (Female) in Best & Worst of Cartoons

Korra

as Best Cartoon Crush (Female) in Best & Worst of Cartoons

Gael García Bernal

as Werewolf by Night in Midnight Sons

Bill Skarsgård

as Kro in Marvel Cinematic Universe

Patton Oswalt

as Pip the Troll in Marvel Cinematic Universe

Dagger (Tandy Bowen)

as Best Cartoon Crush (Female) in Best & Worst of Cartoons