Well, given that this place occasionally does operate on logic I'd consider naive under normal circumstances, it's entirely possible the same entity is responsible for both... but it's still difficult to say. Researching the legends of regions other than Kanto and Johto have proven fairly tedious, though I've seen some evidence to indicate that some sort of creator deity may exist in the legends of one region or another. Of course, whether it matches up to the legends or not is difficult to say without more information.

To be honest, I'm not even sure if Pokemon breed the same way as animals that you and I would be familiar with, given that there are apparently some breeding pairs that would be outright impossible biologically if that were the case.