I believe you cant find/buy a thunderstone in crystal
i think the only way to get a stone is to some person, and give him/her your phone number
later in the game he/she will call you about a stone
Chat with our AI personalities
you can find one at the power plant
Talk to the worker guy on the top floor of the Route 9 Shopping Mall. He will give you a Thunderstone.
Yes you can. From a walkthrough, a person claimed that he received a Thunderstone from someone from Olivia City. It's a "she" that you have to battle and get her contact. Pretty easy though =]
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