Are the robots we create alive?
To fulfill negative entropy, yes it needs physical presence. Binary states changing back and forth inside a computer don't relate to entropy and are thus irrelevant to this definition.
Virtual robots in Robocode exhibit intelligence which is a 3rd concept. But intelligence as a combination of perception and decision making. Intelligence can help a system achieve negative entropy. Although most Robocode AIs are designed to maximize destruction. If they were ported to a physical robot, they would be maximizing positive entropy.