You have to Complete the sinnoh pokedex and then see Professor Rowan in his lab at Sandgem town, then another professor from kanto called Professor Oak will give it to you as a gift.
Normal Pokemon that appear in that area.
pokemon, some of which you wouldn't otherwise be able to find.
eterna forest with pokeradar
vally windworks with pokeradar
pokeradar is only at Pokemon pearl , diamond and platinum.
you need a ralts which you can find by floweroma town when you have a pokeradar
You can catch and find all the sinnoh Pokemon and when you see all the sinnoh Pokemon you get the national dex and find and catch all the pokeradar Pokemon.You get the pokeradar when you get the national dex.
pokeradar is not in FR. it is in Diamond, Pearl, and Platinum
You can find it at Lake Verity or Lake Valor by using the Pokeradar.
You'll find it in Fuego Ironworks, must use the Pokeradar.
You can find a sunkern with the pokeradar in route 204 under floroma town.
Lake Acuity and Lake Valor. In the grass with the Pokeradar.