Dark Data resembles the form of data known as fractal code, except for one differance, it is black in colour. Dark Data is said to have spawned from the Dark Area itself. This form of data has been known to corrupt good digimon and turn them evil and cruel. It is believed that the Seven Great Demon Lords' basic data is in fact Dark Data which is why they cannot be purified. Dark Data has often manifested itself throughout the Digital World's history, Dark Spores, Dark Gears and it is also believed that Dark Data is the reason why many angelic digimon fell.