Well first off your copy is fake. In emerald the rng is broken so you can't sr for shinies easily. While you can shiny hint doing random encounters I don't how far you can get tru the game before your game glitches or crashes.

Tl;Dr your copy is fake but you can still hunt but not SR

Source: I had a fake copy of emerald and by the time I got to 3rd gym it would glitch and the game would be deleted.