JB is the thirteenth (13th) cat you unlock in the game.
Unlike the other, flesh-and-fur cats, JB is a robot. It's mostly bright red, with white paws, tail-tip and a long white stripe running across it's face. Its eyes are unusually large, has both pupils and whites, and its irises are bright blue. Bolts line its face, ears and appears to attach its legs to its body.