Dynamic_Fusion
HIKARI HYPE
Terminology here matter, Ash is the Alola League Champion not Alola Champion. You will ask now "Why does it matter? Alola didn't have one in the first place anyway?".... Well it matters because it was of the fact that he was the League Tournament Champion and not the Champion of the Region was the reason of why he was idly able to leave Alola in the First Place, without being obliged to any duty to the Region (Protecting It like other Champions of the Regions, ex: Cynthia, Diantha, etc.). If anything, he is nothing but the winner of a mere tournament, the tournament will be held once again, someone else will win it and the cycle will continue. It is as simple as that. Same thing with other League Tournaments/Conferences. The Winner of the League Tournament is not required to defend his Title like the Champion of a Region is, that is another difference. We saw Alain in XY&Z, that after winning the League Tournament, he went to back to being a Laid-Back Assistant. It is nothing but a mere tournament, the only problem is that the Anime made such a big deal out of it from OS-XY and had no concrete direction because of that people are confused. To make matter confusing they even introduced the so-called "Champions League" and made a big deal out of it in DP & BW (only to forget about it when Alain won the Lumiose Conference and went back to being an Assistant without challenging any Champions League, from this we can confirm that the Champions League has been non-cannoned and only existed to falsely hype up and bait fans.)