Kevin Michael Richardson Kevin Michael Richardson voiced Carlton Duquesne in Batman: Mystery of the Batwoman, Joker in The Batman and Lucius Fox, Avery, Wounded Man and Bulky Man in Batman: Gotham Knight. He also voices Clayface and Martian Manhunter in Young Justice. Kevin Michael Richardson voiced Black Manta, B'Wana Beast , Despero, Steppenwolf, Blockbuster, Detective Chimp, Monsieur Mallah, Starro, Telle-Teg, President Barack Obama, Lex Luthor, Mister Mxyzptlk and Astaroth. Heroes Voiceover in Batman: The Brave and the Bold. Retrieved from "https://braveandbold.fandom.com/wiki/Kevin_Michael_Richardson?oldid=17748" Categories: Cast and Crew Voice Actors Community content is available under CC-BY-SA unless otherwise noted.