I decided to give that dumb cat from my fanfiction a design lol

Mononeko does have the same black and white and red eye design as Monokuma, however there are differences between the two. For one, Mononeko has a slimmer body, his face is shaped to be more feline, his teeth always remain sharp looking, hair tuft, no belly button and, of course, the long fluffy cat tail. As to where he came from? No one knows at this point, though the feline seems to have memory of who Monokuma is and often refers to him in almost a rivalry state.