Quoted By:
I noticed in Firered/Leafgreen data that the Trainer Tower trainers do have Evs values (alongside the Ivs ones) and Personality values of 255, both that the regular trainer in the main story lacks, the Shiny seen here are Espeon, Seaking and Meowth which are set in ''setvar id event'' that generates them as shiny (not in party data), Clover Chris Chan first Clovermon is set to be shiny too
While its possible to give trainer parties strings data Evs, Secondary Ability and Personality Values, i wonder if its possible to make them Shiny in the party strings without setvar event generation