2:18 pokeradar... Also dont run away from it অথবা the chain will break. (Go for the bushes that shine and look like water sprinklers) So just kill off pokemon till আপনি see a ditto. Whcih ditto's will keep poping up more. It took me 45 মিনিট to find one so be patient.
আপনি Can find Ditto in Diamond on Route 218 but আপনি need the PokeRadar,to get the radar আপনি go to Professor Rowan after you've seen every Pokemon in the Sinnoh and Defeated the Elite Four ;)