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you cant
you cant
You cannot, unless you hack a Pokemon ROM.
There are lots of fun pokemon rom hacks, i would recommend pokemon light platinum, pokemon sienna (it's not a finished hack though) and pokemon ash gray :)
TO map hack on Pokemon emerald get a celebi and talk to may. then go to altering cave and look at your map for 3 minutes.
theres a video on how to hack pokemon android versions on youtube.
you hack
Just by using tools.
Pokemon Light Platinum is a rom hack of Pokemon Ruby.
no it is a ROM hack from firered
Pokemon ash grey is not an official game It is a Rom hack of Pokemon FireRed
go to a website where you can make ROM hacks or a Mario website etc and you may have to download a software (not sure) and you can make the ROM hack.(etc= other)