How do I get a thuderstone in black 2?

Question

I need one

Answer 1

Nimbasa City (With Dowsing Machine), Chargestone Cave, , Wellspring Cave (Dustcloud), Chargestone Cave (Dustcloud), Mistralton Cave (Dustcloud), Twist Mountain (Dustcloud), , Victory Road (Dustcloud), Giant Chasm (Dustcloud), Seaside Cave (Dustcloud), Rebirth Mountain (Dustcloud), Clay Road (Dustcloud), Underground Ruins (Dustcloud), Relic Path (Dustcloud), Caselia Sewers (Dustcloud), N's Castle (Dustcloud)

http://www.serebii.net/itemdex/thunderstone.shtml

Comments

He said Black 2.

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this is black 2

Answer 2

In Black City, Gear Station, PWT, Join Avenue. Same for White 2.
http://www.serebii.net/itemdex/thunderstone.shtml