Suggestions by @bobbyhavens

Josh Keaton

as Slash in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Froy Gutierrez

as Leatherhead in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Liam Neeson

as Man Ray in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Ryan Grantham

as Dreadmon in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Matthew Gray Gubler

as Mutagen Man in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Eric André

as Herman the Hermit Crab in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Jason O'Mara

as Bebop in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Mark Hamill

as General Krang in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Michael Bell

as Old Hob in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Quinton Aaron

as Dr. Baxter Stockman in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Troy Barnes

as Rocksteady in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Susanna Thompson

as Sally Pride in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Gabriel Byrne

as Monty in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Alexa PenaVega

as Carmen in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Francine Diaz

as Sheena Murphy in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Sam Riley

as Carter Dawson in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Eric Bauza

as Splinter in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Keith Silverstein

as Shredder in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

Aimee Interrupter

as Zanna in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6

George Newbern

as Zink in Teenage Mutant Ninja Turtles: The New Animated Series - Season 4, 5, and 6