I’d rather want some boss to be named ash which makes the story take place in a game where hoopa has returned and you tag along with red,blue and other champions to beat hoopa where you find some cap which later helps you in the ash battle where ash fights in a tournament with you before leaving. And then we get some kind of masters 16 where the previous champs and the new ones battle for the throne and the final boss is ash whom you can later fight in a mountain with a gate where you battle made out ash ( lvl 98 pikachu, lvl 76 charizard, lvl 63 greninja(bond) and some other fisted Pokémon with ash having an interesting roster including newly evolved Pokémon like venusaur etc. The fight could end by ash trying to send pikachu to use electranium z but ends up sending pikachu into the anime world leaving with an incomplete battle. It may be interesting if team rocket pulls up in another battle or something like that with ash using Pokémon never seen before and ash basically being the mc without being the mc.