Samekh

Now that shiny Eternatus is out, is there a way to legitimately register the shiny Eternamax on the SwSh dex or is that only possible by editing your save using PKHeX? I tried using Eternabeam, but that also doesn't work.

Nevermind, I found the problem. You have to set "2019 Pokémon Movie" as the met location, not "a Pokémon movie".

I'm trying to make an event Mewtwo for LGPE but it keeps saying it doesn't exist a Mystery Gift data for it during the legality check. Is it possible to add it on the PKHeX database?