No, it's not T'Challa in Black Panther Cat Sticker as you thought it to be. Probably, this is Bast, one of the eldest of the Ennead, and the child of Ra himself. She is a black cat that is believed to be extremely powerful, though she typically acts through surrogates or possesses and grants power to others, usually, it's about some degree of superhuman strength, speed, agility, senses, and so on.