Miss Kitty was the black cat who belonged to Selina Kyle.
Miss Kitty was fond of her mistress. Shortly after she disappeared from Bruce's life, Selina placed Miss Kitty in his path so he would be aware of her survival and presence.
Behind the ScenesEdit
It was unclear if Bruce had adopted Miss Kitty, or simply held onto her for a short time. A possibility was that Bruce kept her at Wayne Manor, and she simply never appeared onscreen during any moment of Batman Forever and Batman & Robin.