Poketransfer.
Dusclops can not be found in Pokemon White/Black. Duskull is also not available in Pokemon White/Black. The only way is by PokeTransfer from DPP / HGSS. However, Duskull can be found in Dream World with their special ability.
You can find Duskull on Route 224. :)
You can find a Duskull in the Safari Zone.
You can find Duskull in Sapphire at the Mt.Pyre Summit. There are mostly Shuppets, but there are some Duskulls.
duskull is found in the safari zone in fuchsia city.
You can find a Duskull in Pokémon Diamond by using a PokéRadar at Route 224 with a Rarity of 2%.
Duskull is a Sinnoh pokemon as in pokemon platinum you get darkrai which is the evolution of duskull.
Route 224
the Pokemon tower by solaceon town
Duskull a Ghost type pokemon.
lost tower at night
You can find them in solaceon town(though they are rare).