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 Forever another riddle. Using the riddles, Bruce and his butler, Alfred, deduce the Riddler's secret identity. Chase is imprisoned by the Riddler and Two-Face in their hideout. Dick returns and becomes Batman's sidekick, Robin. Batman and Robin head to Riddler and Two-Face's lair, Claw Island, where they are separated. Robin encounters Two-Face and nearly kills him, but chooses to spare his life and is captured. The Riddler gives Batman a chance to save only one hostage, but Batman destroys the Riddler's brainwave collecting device, causing the Riddler to suffer a mental breakdown and allowing Batman to rescue Robin and Chase. Two-Face