>>44538841There's a number of ways to look at this.
>He just hadn't been created yetYou can't use characters, no matter how worthy they might be, before you've ever even conceptualized them. This way of thinking leads to plot holes, but sometimes you just have to accept that gameplay and story don't always perfectly line up.
>The PWT was newDo you honestly think Clay could have pulled all of the Gym Leaders and Champions from the whole globe for a brand-new contest? PWT probably starts with contenders from Kanto, Johto, Hoenn, and Sinnoh because they represent what is effectively one other country and were willing to accept the invitation. This is probably just how the PWT begins, meaning that if we ever go back to Unova, we could see this being used to justify an expanded cast- more regions/countries are accepting invitations.
>Other regions, including Galar, were invited, but turned it downEspecially if Rose was the chairman, he wouldn't want all of the battles to be happening out of region while he's worrying about his impending energy crisis (even though it won't come for several generations). He's too busy integrating the dynamax battle culture into the energy industry to send the Gym Leaders out.