>>42928286I think it's an East vs West thing. In the West, when you name a legendary creature it's generally a specific one. Bigfoot, the Loch Ness Monster, the Minotaur, Cereberus, Chimera, etc. But in the East, legendary creatures are just really hard to find and/or powerful creatures like a Phoenix, Tsuchinoko, Umibozu, etc.
So it makes sense for there to be multiple Moltres, Zapdos, and Articuno roaming around, especially since their origins aren't really tied to anything like most of the other legendaries.