Regidrago is a pokemon whose existence poses certain chronological problems, for although it clearly bears the marks of artificial manufacture, and an obvious relation to Regigigas' other creations, chemical analysis of the gems which form this pokemon's 'face' (handed over as part of a bid to justify itself when bragging about its antiquity) leaves no doubt that Regidrago predates the paleolithic, and likely the last glacial period.
The question is why. It is hard to imagine that humans (or perhaps one should say hominids) not yet adept at manufacturing stone tools could have created such a complex pokemon. The most common theory of this pokemon holds that Regidrago itself was the prototype, and later humans became aware of it and used its blueprints as a base. Yet it is not as easy as historians desire to dismiss the theory, beloved in paranormal circles, that all archaeological evidence of the civilization which built Regidrago, and perhaps became Regigigas, was buried forevermore by the advance of the glaciers and the passage of time. Conversely, the assumptions underlying the chemical tests on Regidrago could be flawed; the gems are ancient, and have long been buried in dragon energy, but the shaping of that energy into a live pokemon might have been no more recent than the construction of the other automata.
Some scientists maintain hope that, whenever this immortal pokemon dies, its body will be opened up and reveal something about its age and the techniques behind its construction. Or perhaps that new methods will someday answer its mysteries, although carbon dating and stratigraphy will be forever inapplicable. In the meantime, Regidrago remains reticent about its origins, but reacts violently to any suggestion that it is somehow an outdated relic; it is more than powerful enough to win battles in the present!
