At the pokeatholon dome.
Dusk stones/shiny stones/ dawn stones/and oval stones are items that make certain Pokemon evolve. You can get A dusk stone in the galatic building in veilstone city. you evolve happiny by giveing it a oval stone and lvling it up murkrow evolves with dusk stone you evolve Roselia by using a shiny stone you can evolve togetic with a shiny stone
Dusk= Galactic Warehouse Shiny=Iron Island B3F Dawn=MT.Coronet(2nd)1FL.
5 but i don't know where
evolve certain Pokemon
Dust Clouds in Caves.
shiny leaf thunder fire dusk dawn water and sun stones
Thunder stones, Water stones, Fire stones, Leaf stones, Shiny stones, Dusk stones, Oval stones, Moon stones, Sun stones.
The first one is in the Galactic Warehouse in Veilstone City. You can also dig Underground for more Dusk Stones, as well as other elemental evolution stones!
Dusklops evolves into dusknoir with one.
you can get dusk stones in the galactic ware house,victory road or using a Pokemon with the pick up ability
You can find Dusk Stones in Route 10 and within Dust Clouds in Wellspring Cave, Mistralton Cave, Giant Chasm, Chargestone Cave, Challenger's Cave, Twist Mountain, Victory Road and you can find some Dusk Stones lying out within Mistralton Cave.
You can find as many as you can. When you are in a cave (like the Giant Chasm) a swirling dust cloud can contain a Dusk Stone.