Batman an occasional ally and romantic interest), the Penguin, Ra's al Ghul, Two-Face, the Riddler, the Scarecrow, Mr. Freeze, Poison Ivy, Harley Quinn, Bane, Clayface, and Killer Croc among others. Many of Batman's adversaries are often psychiatric patients at Arkham Asylum. Batman's butler, Alfred Pennyworth, first appeared in "Batman" #16 (1943). He serves as Bruce Wayne's loyal father figure and is one of the few persons to know his secret identity. Alfred raised Bruce after his parents' death and knows him on a very personal level. He is sometimes portrayed as a sidekick to Batman and the only other resident of
Batman: The Animated Series premiered on The WB, featuring a teenager named Terry McGinnis taking on the duties of Batman under the guidance of an elderly Bruce Wayne. Then in 2001, the "Justice League" animated series premiered on Cartoon Network, featuring Batman as one of the founding members of the League. This was continued in 2004 by "Justice League Unlimited", featuring a greatly expanded League. Many DC cartoons unrelated to the larger DC animated universe, such as "Teen Titans" and "The Batman", also featured character designs strongly influenced by those of Bruce Timm. The dramatic writing and stylized art of "Batman: The Animated Series"