Bio: Batman encountered the German shepherd when the dog was pet to a 130-year-old Native American shaman named Black Wolf. Batman was drawn to a bat-shaped patch on the dog's shoulder, and followed the dog. Batman was led to and rescued Black Wolf from members of his own tribe, who wanted to silence his protests at their evil plans. Batman and Black Wolf worked together to stop the tribe from committing atrocities that they felt would balance the heinous crimes committed by European settlers in 1863. After their mission, Black Wolf died and Batman brought Ace back to Gotham City. Ace aided Batman on several occasions, including tracking the monstrous and elusive Killer Croc. Once ensconced in the Batcave, Ace was drawn to the mute hunchback Harold, who had also come to live in the cave and build tools for the Dark Knight. Harold, in return, built Ace a mechanical mouse to play with. Ace was last seen prior to events known as No Man's Land.