You can purchase them, along with any other stone (excluding the moon stone), in the Celedon shopping complex.
get a pikachu and geive it a thunder stone
At the celadon department store
The thunder stone makes certain Pokémon (such as Pikachu) evolve. To get one in Fire Red version, go to the Celadon City market.
get lass dana's number and she will say she has something for you
The thunder stone is used to evolve electric types of Pokémon such as Pikachu. You can get one in Gold version in the Celadon City department store.
The level of your pikachu doesn't matter, because to make it evolve you use a thunder stone on it. i hope that answers your question. You can get a thunder stone underground.
you go to valder city go to the giant mart and one of the floors it will have it.you have to buy it from the people good luck in your Pokemon game but I got this from the Pokemon gameboy blue version.
They are found on floor 29 of lightning field.
the Pokemon that evolve with the help of a thunder stone are : pikachu +thunder stone = raichu, or eevee + thunder stone = jolteon.
Evee will never evolve unless you use a fire stone, water stone or thunder stone on it.
Buy it in Celadon City Mart.
The thunder stone is in New Mauville, the Sun stone is at the Mossdeep space center, You cannot get the shiny stone in gen 3 because it was introduced in generation 4.