underground using explorer kit
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!).
if you dig underground you'll eventually find thunder stone then after a while you'll find shiny stone ;^)
you can find a thunder stone underground digging them up............i rock w!ll m@l0n#
You can find the thunder stone in New Mauville
you can find a thunder stone by checking the UNDERGROUND
You can get a Fire stone,a Water stone and a Thunder stone in one of the rocks.You can also find those in Diamond and Pearl.
You can find it anywhere.
sunyshore city or the underground
you must either find one in the underground which is really difficult or find the one in sunnyshore city near the light house.
You find the thunder stone in Celadon Mall level 4, wise man gifts.
Use a thunder stone on an eevee
You can find them underground