Thunderstone can be used to evolve a Pikachu into a Raichu.
In Generation III (Ruby, Sapphire, Emerald, Fire Red, Leaf Green), the only Pokemon that evolve with a Thunderstone are: Eevee, which evolves into Jolteon; and Pikachu, which evolves into Raichu.
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.
You can use a thunderstone on: Eevee - Joltron Pikachu-Raichu totallychoco
pikachu evolves into raichu if you use a thunderstone on him other Pokemon evolves to if you use it but i don't now them DIAMOND AND PEARL ONLY
to evolve Pokemon
catch a pikachu in the safari zone and use a thunderstone on it. catch a pikachu in the safari zone and use a thunderstone on it.
get a thunderstone and use it on pikachu
Use a thunderstone.
give the shard hunter a yellow shard found under water near mossdeepcity and sootoplis
You can get a Thunderstone in New Mauville and by trading a Yellow Shard to the Diving Treasure Hunter on Route 124.
You Cant it is only compatible with ruby version not with F/L or s/eUse a thunderstone on pikachu.
you can but, only on certain pokemon ex: pikachu+thunderstone=Riachu voltorb+thunderstone=nothing but wasted time