>>51341935They don't "come" from Pokeball factories, they're just found there.
The introduction of Voltorb to the Hisuian dex actually brings some interesting questions to the forefront of Voltorb theories. Particularly, what the hell it actually is and what it's origin might be. See, Voltorb has a long and interesting history of what the fuck it might actually be. There was a theory eventually suggested that most people quietly agreed on, but the introduction of Hisuian Voltorb sort of confused that shit to fuck and back. Let's look at the dex entries to get a good idea.