>>27807545they definitely fucked up the lore. But it depends on the context for artificial. Artificial basically means it's imitating something. Definition doesn't restrict itself to only natural or only non-natural materials to make the artificial skin.
It could mean they made porygon out of living tissues. Or simply altered the genes of a pokemon to imitate another pokemon that eventually made porygon. On the other hand, magearna is made entirely out of crafted "man-made" materials. No living tissues, per say.
