Ok so i found him on his original location at the command center but now i am trying to find him around the city. I'm using the map guide for his locations but seems his not appearing at all on those location. Anyone can help me on this? --- The strong shall live, the weak shall perish. Survival of the fittest. - Shishio Makoto
Easiest way is to search the SE area (forget the name, it's the Shopping Mall) for the 7-8 spots he can appear. If he's not there, go back out to the Historia Crux and reenter. If you search the entire city each time it will take a lot longer.