>>49766483PLA made it pretty clear that around its timeframe was when Laventon created Pokeballs so it's only within a couple hundred years of Sinnoh existing at most. Akari/Rei also bring up that Lucas/Dawn are the only ones who are able to throw Pokeballs that precisely and adeptly which is the only reason why you're even accepted into the Survey Corps., Adaman and Irida don't even believe they're humane and trap the Pokemon, you're constantly told everyone just befriends Pokemon with other regions hosting tournaments for people who do that, and that's about it.
