User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5020152-20120829202114/@comment-4212769-20120830103930

Well, "discovered" is such a word in MH... Even when they "discovered" the Common Rathalos first when you're fighting this Rathalos in Forest And Hills there is no guarantee that none of the "undiscovered" monsters could appear. I think that "discover theory" can be thrown out of the window right away...

About the "single" Common Rathian and "single" Azure Rathalos: The example wasn't meant to explain the mating of both. There are quests aiming Black Diablos (high territorial) and Barioth Subspecies as targets. It's very likely they would fight, too. And still there is a quest with those. So even if they'd fight there could be a quest with them.

Yes, the Liger doesn't exist in nature. But that has a very simple reason: (Asian) Lions and Tigers don't meet often and they are very different but for being Felinae and Panterinae. And there are enough other sexual partners (well...) out there. But Rathalos "subspecies" and Rathian "subspecies" are that similar that they only differ from color. They are still the same species so they could just mate when both haven't found a partner for example. And because there are no bastards out there, that's one of my points that your theory is wrong.