voice of the original Alpha 5 in Mighty Morphin Power Rangers, Power Rangers Zeo, and Power Rangers Turbo, as Raz in Psychonauts, Billy and his dad Harold in The Grim Adventures of Billy & Mandy, Daggett in The Angry Beavers, the title character Zim in Invader Zim, and Orthopox in the Destroy All Humans! series.

Richard Steven Horvitz - Wikipedia, the free encyclopedia