I have to agree there. I lost my motivation of reborn heavily on lag and the grinding was painful with some pokemon i want to train.
Beldum ugh. Kinda that's why i'm really active on rejunvenation.
I haven't seen that before. I checked bublapedia and it was said it was a glitch in the old games. However the glitch was fixed in the old games.
I don't think you can't get a shiny pokemon from the shadow pokemon.