A Thunder Stone is an evolutionary stone that allows certain Pokemon to evolve when exposed to it. In the third generation of Pokemon games, there is one Thunder Stone in New Mauville, and they can be had from the Diving Treasure Hunter for Yellow Shards.
Moonstone everstone sun stone water stone fire stone leaf stone and thunder stone
At the Pokethlon Dome or at the Bug Catching Contest
You get it from Billy's Grandfather on route 25 after showing him some pokemon.
After you battle and beat the gym
the Pokemon that evolve with the help of a thunder stone are : pikachu +thunder stone = raichu, or eevee + thunder stone = jolteon.
you need a pichu and than give it to bill father by mistys gym and you will get a thunder stone.
Thunder stone is not a TM, it's an item to evolve things like pikachu.
Moonstone everstone sun stone water stone fire stone leaf stone and thunder stone
use a thunder stone on eevee
at the pokeathon, but only on certain days
Show Bill's grandpa a Pichu, and he'll give it to you.
At the Pokethlon Dome or at the Bug Catching Contest
You have to get a pikachu first then give it a thunder stone, or you can train it to evolve
You get it from Billy's Grandfather on route 25 after showing him some pokemon.
actually pikachu only evolves when you use the thunder stone on it.
After you battle and beat the gym
the Pokemon that evolve with the help of a thunder stone are : pikachu +thunder stone = raichu, or eevee + thunder stone = jolteon.