Yeah. He's in all of them except FF1. His purpose is usually something with the airship. In II, III, IV, V, VII, IX and X at least one of the airships is his property/he found it/or he fixed it. In VI he worked in the magitek factory and had nothing to do with airships. In VIII he was headmaster at Balamb, which flew, so that kinda counts. And in FFT there were no airships, but T.G. Cid owned anyways.