You can actually purchase thunderstones on the 4th floor of the Celadon City Dept Store you can buy as many as you want.
Evolve the Eevee you get given at the top (using the back entrance) of the Pokemon 'Mansion' in Celadon using a Thunderstone.
You need surf, you'll find on at New Mauville (the route is under the cycle bridge to the east) There'll be a thunder stone in the complex. You can also collect Yellow Shards from using Dive in the Ocean and trade them for a Thunderstone. Otherwise you can simply trade with FireRed/LeafGreen with a Pokemon holding a Thunderstone.
The Pokémon that evolve via the Thunderstone are Pikachu which evolves into Raichu and Eevee which evolves into Jolteon.
The only way you can get a Thunderstone in Pokemon Ruby is by finding a Yellow Shard and trading it for a Thunderstone in the Hunter's houe, just off Mosdeep city. These shards are found when searching the ocean floor with a Pokemon who knows Dive. Of course, you can get a friend to attach a Thunderstone to one of their Pokemon on FireRed or LeafGreen and trade it to your Ruby version.Another solutionThere is also a thunderstone in the basement you just have to fing it. Mauville. He will give you the BASEMENT KEY. Surf off to the right of route 110. Go in the cave and you'll enter the basement. At the end of the basement theres a pokeball. Inside is a thunderstone.
On FireRed (and LeafGreen, Blue and Yellow) you can BUY thunderstones, firestones, leafstones and waterstones at the department store in Celadon city. It's really easy.
A thunderstone
You can buy it at the celadon pokemart mall.
Evolve Eevee by exposition of a Thunderstone.
I think you can only get it by using a thunderstone on an eevee. You get the eevee from Bill in Cerulean City.
Yes, it's the only way to get a Raichu in any pokemon game
Raikou? I think you mean Raichu. To get a Raichu, just use a thunderstone on a Pikachu and it should evolve into Raichu. To get the thunderstone, go to the Celedon Department store or find one at the power plant.
What I did was catch a Pikachu in Viridian Forest, then level it up until around 35 and gave it a ThunderStone.
its not a jolteon when u get it. its an eevee. use the thunderstone to make it a jolteon. the eevee is in a house in celadon city
You can actually purchase thunderstones on the 4th floor of the Celadon City Dept Store you can buy as many as you want.
Evolve the Eevee you get given at the top (using the back entrance) of the Pokemon 'Mansion' in Celadon using a Thunderstone.
You need surf, you'll find on at New Mauville (the route is under the cycle bridge to the east) There'll be a thunder stone in the complex. You can also collect Yellow Shards from using Dive in the Ocean and trade them for a Thunderstone. Otherwise you can simply trade with FireRed/LeafGreen with a Pokemon holding a Thunderstone.