You dont
You have to migrate from Fire Red or Leaf Green
find a ditto. it can breed with any gender of kind of Pokemon except legendary.
no,ditto is not in route 218 in Pokemon platinum it is in the trophy garden
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use the poke radar on route 218 (rare)
At the trophy garden, rarely. it's in Pokemon platinum.
The Trophy Garden is the only place to get Ditto in Pokemon Platinum, without trading or cheating of course.
U can get ditto on the mansion, talk to the owner of the mansion everyday and he will add a new Pokemon one of them is ditto
info on manaphy in Pokemon mansion. trade for manaphy, and breed with ditto. you get a phione
Ditto only appears at the Trophy Garden on certain days. You can catch other rare Pokemon there on other days. Hope this helped! =) (Even on the right day Ditto is rare.)
after getting the national dex go to the Pokemon mansion and talk to mr. backlot. he will say he saw a Pokemon in his garden if he says ditto then go look on the garden
Noooooooooooooooooooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
In Pokemon PLatinum there r in pewter city