Regenerative Healing Factor: Waylon Jones' regenerative healing factor is quite remarkable, as superficial lesions, extreme mutilations, ballistic wounds, stab wounds, severed limbs & organs, massive bruises & cuts completely heal almost instantaneously. However, that ability had severe side effects as well: Namely, having to regenerate extensively for a prolonged period of time alters his physiology, which is likely an adaptive response to the extreme trauma. More specifically, the torturous experiments Croc underwent, caused him to have his physiology end up permanently altered so that he looked even more bestial than before.
Armored Skin: His skin hardened to the point where it was invulnerable to most forms of abrasion and even high caliber weapons fired from a distance. He could also stand extreme pressure conditions. On one occasion, in the Arkham War Comic Series, for example, Croc survived the fall from Wayne Tower and healed completely. Croc was also capable of withstanding an extreme amount of blunt trauma. By the time of the Arkham Knight incident, it required Batman and Nightwing landing many multiple strikes to his head in order to render him unconscious.
Superhuman Strength & Speed: Originally Batman was capable of overpowering him, although with considerable effort. Over time, he grew so physically powerful and quick over the years that Batman had to resort to planting explosive devices on Croc's chest to knock him unconscious or even stop him. He was also able to rip a large bank vault door right off its hinges with ease and leap great distances vertically and horizontally. By the time of the Arkham Knight incident, Batman and Nightwing had to double-team him in order to take him down. He had also taken to running on all fours, though when he walked, he did so on two legs.
Enhanced Lung Capacity: His reptilian nature allows him to hold his breath for extensive periods of time underwater.
Claws: Croc's fingers were sharpened and white like bones. He used them to cut open doors or crush skulls and cut people clean in half.
Fangs: Croc's teeth possessed enough sharpness and durability to bite through bone, metal, and wood.
Hearing: Batman had to be cautious when traversing Killer Croc's lair, as he had very good hearing and would discover him if he ran too quickly.
An intense hatred of humanity
Expert wrestler & street fighter
Cannibalistic killer
Savage, animalistic & barbaric mental state
Was an expert swimmer and could hold his breath for hours at a time

Spyro_5643