You go on to battle the champion Cynthia.
You can find out how many times you have beaten the Elite Four in Pokemon Diamond by checking your PC in the game.
beaten down by close combat!
YOU CAN'T, WITHOUT BEATING THEM!!!!!!!!!!!!!!!!!! or being beaten
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You can get it from Bebe (the house next to the Pokemon Center in Hearthome City) after you have beaten the Elite Four and Champion.
you go to the Pokemon center in hearthome city and talk to nurse joy after you've beaten the elite four
yes, after you have beaten the elite 4 and go to the transfer building near lacunosa town.
u have to migrate it from Pokemon emerald, and ditto is in the cave at fallabor town after u have beaten the elite four
No there is no secret store I know that for I have beaten the elite four 20 times and have searched every corner of Pokemon diamond's world.
Unfortunatly, yes you do. I haven't beaten the Champion yet and on Pokemon Diamond & Pearl, you can't migrate until you beat the Elite Four. Which I think is weird because you've already beaten the game.
finish the nation pokedex
You have to have Pokemon fire red for GBA. Catch it on that.Once you have beaten the elite four and finished the Sinnoh Dex (on diamond) the Pal Park will open and you can migrate it from fire red to diamond.