Just use it in wild grass, and when using it on the grass, make sure ur not riding the bike, then it wont work. plus, you can only use it once before you have to recharge it by walking about 50 steps though. Just watch out for the wiggling grass, and that's where a Pokemon is hiding.
You can get Duskull by using the Pokeradar on Route 224 in Pokemon Diamond. You must use the Pokeradar at night in order to find and catch Duskull.
pokeradar is only at Pokemon pearl , diamond and platinum.
you have to use your pokeradar on route 205
go down of solaceon and use pokeradar
Go to route 218 and use the pokeradar .
In route 222. How: Use pokeradar.
sometimes you can use pokeradar. if you us pokeradar and get 599 smurgles the 600th will be a wyruant
use the pokeradar on the grass at valor lakefront
on route 230 use your pokeradar
smeargle
You must have the pokeradar. Go outside Valley Windworks (east of flororoma town) and use the pokeradar
use pokeradar on a body of water that has lots of gyrados