you must find sharps in sea bottom and trade in hunter's for a thunderstone
You can find the thunder stone in New Mauville
If you mean the Thunder stone, you go to the New Mauville Power Plant.
pikachu
use a thunder stone on pikachu.
you can find a thunder stone by checking the UNDERGROUND
You first need a yellow shard these can be found using Dive near the Hunter's house, Second give the yellow shard to the hunter he will trade you a thunder stone for the shard. Another way to get a thunder stone is by trading a Pokemon from firered or leafgreen that is holding one to ruby, sapphire or emerald.
to get a moon stone on emerald you shold find sum in caves (hidden)
The TM thunder wave no longer is a TM.
You need a thunder stone. He doesn't evolve by level. :)
If you mean the Thunder Stone, go to the New Mauville Power Plant.
You can get the thunder stone by going underground and digging for it in Pokemon diamond/pearl ( the thunder stone , fire stone, water stone, and the leaf stone is very rare, so good luck!).
You find the thunder stone in Celadon Mall level 4, wise man gifts.