How do you make all the Pokemon shiny in Pokemon emerald?

Not sure but if you can go to the battle frontier get a nugget put it first in your bag go to the battle pike with a Pokemon you cant use in it. then fly to a patch of grass and BOOM you may not get it the first couple of tries but it will work soon i tried it and it worked i got like 50 shinies doing this Like my shiny Raquayza