In Pokémon FireRed, Thunderstones can be found in the Power Plant and you can also buy them in the Department Store in Celadon City.
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you can find it in the power plant, or the department store. the power plant is accessible after you get surf.
You can buy it in Celadon Dept. store.
The thunder stone makes certain Pokémon (such as Pikachu) evolve. To get one in Fire Red version, go to the Celadon City market.
fire stone = flareon water stone = vaporeon thunder stone = jolteon (For fire red & leaf green) sun stone = espeon moon stone = umbreon have fun :D
No, you can't get any electivire in fire red even you use thunder stone on Electabuzz