He had all his positive aspects removed. This version had lost the Cat's sense of fashion and dressed in rags. He also enjoyed pain, shown when he burnt his cheek with a coffee pot on purpose and smiled when the Low Kryten headbutted him.
He had a monobrow and appeared to have two enormous teeth which showed that he had evolved from a sabre-tooth tiger instead of a normal domestic cat. He was seen eating the remains of his higher self messily.
He was destroyed when the triplicator recreated Red Dwarf from the two copies. (RD: Demons & Angels)