I habe managed to complete the requirements for the shiny Meloetta HOME challenge, and I've decided I will use it as my final team mate for as I face against the Violet Blueberry League. Now, if only I could figure out how to win against any of them. Even with a Lv 80 team they give some serious hands, but I also want to make sure there is still a challenge which is why I want to avoid overlevelling too much.
I am curious as to what the reward for Z-A will be. Excluding LGPE, every other Dex releases a shiny that was currently impossible to obtain in any way. Complete SwSh's dexes? Keldeo is released Complete SV's dexes? Meloetta (note that both of these were made unlimited encounters in the games' DLC). Complete BDSP? Manaphy. Which while technically available as a shiny before, that's only due to an oversight. The egg you got from Ranger was supposed to be shiny-locked, however an exploit popped up where you could pick the lock by moving it to a different save file. So this is the first intentionally available shiny Manaphy. Complete PLA? Enamorus, which isn't a mythical but since all the other legendaries and mythicals present in those games (excluding Manaphy as mentioned) have had their shiny released, it was kind of the only option
As such, I doubt Diancie will be the reward for completing the Z-A Dex, since it a shiny Diancie was released in a limited time event in the past. Rather, it will be either Hoopa and Volcanian that I think will get their shiny released for a reward in completing the Z-A Dex. And if I had to guess, I would say the former as it's what is getting the focus of a DLC. All that means is that Victini remains the earliest mon in the Pokedex to have its shiny completely unavailable. Maybe it'll have to wait until the Unova game I feel they will make in Gen 10