You can find it at these areas: Route 9, Chargestone Cave, Wellspring Cave(Dustcloud), Mistralton Cave(Dustcloud), Twist Mountain (Dustcloud), Challengers Cave, (Dustcloud), Victory Road (Dustcloud), Giant Chasm (Dustcloud)
you can find them in caves where there is a dust cloud. dust clouds in caves give you items, all evolutionary stones, and sometimes it can be a drilbur or other pokemon. so be careful while searching
The Saffron city department stores sells all types of stones, including the Thunderstone.
This item can be found on route 9, in Chargestone Cave, and in the Black city.
route 9
134.Vaporeon 135.Jolteon and you have to evolve eevee with a thunderstone or water stone
Celadon city
most days of the week you can buy it in black city market for p10,000
After pewter City You can f
Tynamo will evolve into Elektrik will evolve into Elektross with a thunderstone in Pokemon White.
Eelektrik does
Eelektrik - Eelektross
Eelectrik into Eelectross
route 9
thunderstone cave
In Pokemon Black and White you can find a Thunderstone in these locations: Route 9 and Chargestone Cave. Sometimes, a dust cloud will appear and you could get evolution stones or Gems. These are the locations where you can possibly find a Thunderstone in: Wellspring Cave, Chargestone Cave, Mistralton Cave, Twist Mountain, Challenger's Cave, Victory Road, and Giant Chasm.
Pikachu+Thunderstone=Raichu Eevee+Thunderstone=Jolteon These are the only 2 pokemon that evolve with the thunderstone in pokemon emerald
you can find one at the power plant
Pikachu evolves when you give it a thunderstone.
it evolves with a thunderstone you can get one in chargestone cave
You can buy it in the Celadon department store, or find it in the power plant