You get Pokeradar from Professor Rowan in his lab after completing the Sinnoh Dex.
In route 211, use pokerader.
Use Pokerader on route 201
pokeradar is not in FR. it is in Diamond, Pearl, and Platinum
use the pokerader on route 214
use the pokerader in front of the mantion
You can either hatch them or run into them with the pokerader. To get the pokerader, you have to complete the sinnoh pokedex.
route 208 (pokerader)
The Pokeradar is an item that you get in Pokemon Platinum. You get it from Professor Oak after completing the Shinoh Pokedex.
You cant. You can only get it in Pokemon diamond, pearl, or platinum.
use your pokerader @ rt.228
Once you have the national pokedex go to the Pokemon mansion and save in front of mr backlot then talk to him until he tells you there was a ditto in the trophy garden and use the pokerader (you HAVE to have the national pokedex)
route 230, you will need to use the pokerader.