Aristo

The leader of a gang of criminals (the text describes Aristo as a "cunning international thief" and "slippery international character") who steal a magic lantern created by Larko the sorcerer from its place in the Gotham Museum and then transform Batman into a magic genie, doomed to remain imprisoned inside the lantern until he has fulfilled three wishes for the lamp's owner, by sprinkling him with mystic powder stolen from Larko's tomb. In his genie form, Batman possesses awesome magical powers and is an obedient slave to whomever holds the magic lantern, but, by working together, Robin and Bat-Girl succeed in outwitting Aristo until the three wishes have been completely exhausted. Then, with Batman liberated from his role as genie and transformed into a mere mortal again, the Dynamic Duo swiftly apprehend Aristo and his henchmen.