>>54973559IIRC, I think there's some way you can mess with the Gen I VC games to get a Shiny Mew and have it pass through Bank and Home clean, didn't look up the method because it was a 45-min long vid from a Poketuber, but there evidently is an alternative option out there.
Good luck if you're going for Celebi btw. I'm in 1,501 deep right now, and I'm worried I might not be able to get it in time, even if I do drive the resets up to ~18k where the binomial probability is about 90%.