Dr. Julian Ivo Robotnik rarely expressed regret. Rage at failure? Yes. Fury at loss? Yes. But true regret, a quiet hopelessness? Almost never. Except for now. "Now" being the moment he entered the infirmary and saw the explosion of debris marking where Unit 7IN4 had stood a few hours earlier. All machines within a 30-foot radius of Dr. Robotnik developed self-preservation protocols very quickly, and Metal Sonic was no exception. "Unit 7IN4 was aiding Test Subjects 1, 6,  and 17 in their escape," it reported in its usual monotone, the motion of its eyes the only thing belaying its concern that it may have to be uploaded into a new shell. "It