Complex sentence: Clarence and various characters in other episodes and has also voiced various characters in "The Marvelous Misadventures of Flapjack" which J.G. Quintel also boarded for.
Split into simpler sentences: Clarence and various characters in other episodes. He has also voiced various characters in "The Marvelous Misadventures of Flapjack" which J.G. Quintel also boarded for.