If you go to you tube then type in `how to get a shiny mew and mew2` then click on the picture of the boy in the little cave with one small rock, it will show you how to get a shiny mew; mew 2 is included.
You can`t (I have a shiny mewtwo thou) but you can't
You can get a Mew from Emerald's "Old Sea Map" event and soft reset until it is shiny. And a Mewtwo from FireRed/LeafGreen in Cerulean cave sooft reset until shiny. Then Migrate them into Pal Park and recatch.
Are you joking,you can't get any mew or mew2 without cheats
You can't on diamond without transfering
You can transfer it from Heart Gold/SoulSilver but you must be in kanto and beaten the elite 4 bring dusk balls or your master. ( PS you can do this before battling Red)
Ok you can not get a shiny mew or regular mew on pokemon diamond or pearl without transferring it from ruby, saphire, emerald, leaf green or fire red!!!!!! But you even can't get a mew without cheats on that game either the only way to get a shiny mew is to request it on global wide trading!!!!!