Champion of Kalos

What if during the Kalos league Ash bought back his old powerhouses? A much more mature and Powerful Ash. Might do the whole thing with Aloha too then go back to other regions and have Ash conquer them. Not doing the Galar region but will have some Pokemon from it join Ash later on. Reason: Never played the game since I don't have the Nintendo switch and not bothered to watch the whole thing since I'm not the greatest fan of very immature Ash. Plus it's not finished yet. Also not the greatest fan of Two Protagonists. I prefer one. Aloha since I have played the games and watched the anime, as childish as it was, it was fun so I don't mind doing it. Also because I love some of the Pokemon from that region like Decidueye and Incineroar. Slow updates since I got to sch and already have a main book that I'm writing.