Yes I know it, but if I accidentally delete the original one in-game I wonder if there's a rapid way to unmark a survived clone, besides manually modify the .pb8 file with an HEX editor (personally I'm used to making backups of everything, so it isn't a real problem for me at the moment, it's "just in case").
No, you suck at faking data. Re-read what theSLAYER told you that a Shiny Dynamax Adventures Moltres must have.
Legality is complicated, and you can't just make things shiny arbitrarily and expect them to be legal. There are restrictions to what kind of shiny it may be.
Search around for dynamax adventure shinies; your question is not new.