Charles M. Wolf is a one-shot character, only appearing in the short film, "Hare-Less Wolf". In that short, he is seen chasing Bugs Bunny to get dinner for his wife. His name is most likely a play on Chuck Jones's real name, Charles M. Jones.
He is a rather forgetful, pea-brained wolf. A similar wolf character had previously appeared in Red Riding Hoodwinked, with a different design.