Strange… I’ve seen that face before. Is he hanging around my door? Does he live in the neighborhood? You can say he looks a lot like me, maybe a little older. What a handsome fellow! I thought I was looking into a mirror.
In fiction and folklore, a doppelgänger is a paranormal double of a living cat, typically representing evil or misfortune. In modern vernacular it is simply any double or look-alike of a cat. Black cat doppelgängers often are perceived as a sinister form of bilocation and are regarded by some to be harbingers of bad luck. (From Wikipedia, basically…)