There is no poke radar in emerald. Only in diamond and pearl and platinium
Beat the elite four and then go to Rowan then he will give you the poke' rader
Get the national poke dex and talk to profeser rowanTo do that you have to see every Pokemon in the small poke dex you will get the Poke rader! :]
you have to use a poke rader on route208
yes you have to do the Pokemon league
you complete the pokedex for prf. rown and then he gives it to you. :)
You can only catch bagon in pearl. But you can catch larvitar, route 207, you have to use the poke rader. If you had pearl you would find bagon on route 210 (fog) with the poke rader.
use the poke-rader on route 230
ONLY IN GRASS AND you can't be on your BIKE
route 212 (rain) use the poke rader
after you beat the game, use the poke-rader.
go to route 228 and use the poke rader.
Route 210 (fog) you have to use the poke rader to find it.