go under the bridge at the bike road at night
use a poke dex
you will need poke-radar and go to route 209. then you will find a gligar. to involve it give it razor fang.
no u dont need a poke radar u can find him on route 206
No you don`t have to use the poke-radar to catch lavitar.
Use poke radar on route 214 it takes about 33 tries it worked for me.
You can't you must have the pokeradar and the national pokedex.
In the grass under Cycling Road (but only if you have Pokemon Emerald inserted in the GBA slot).
To catch Dusclops on Pokemon Diamond you need the Poke Radar item first. Once you have the Poke Radar go to Route 224 and use the Poke Radar there and Dusclops should eventually appear in the grass.
route213 using poke radar
You go to route 214, find a patch of grass, and use your poke radar. (Its very rare)
Route 224 Poke Radar
you can get him on route 211 with a poke radar