Where to find Thunder stones in XY?

Question

I only ever remember finding one as a kid, and being annoyed that multiple Pokemon had thunder stone evolutions. Now that I'm trying to complete the regional dex in Y, can somebody please tell me where more thunder stones are?

Answer 1

Non-repeatable
- Route 10 (Northwest of middle field)
- Route 11 (Hidden item in the east)

Repeatable
- Secret Super Training (randomly from Follow Those Fleeing Goals!, The Battle for the Best: Version X!/Y!)
- Reward from Inver on Route 18 (7-9 points in an Inverse Battle)
- Use Hyper Voice or Rock Slide on spiky rock 2 (in-battle object on Routes 8, 9, 13, 18, and 19)

Thunder Stone (Bulbapedia)

Hope I helped!

Answer 2

On route ten and eleven. Follow these videos to locate them

https://www.youtube.com/watch?v=PaobAyh_mD0
https://www.youtube.com/watch?v=n_2kxBTXG7g

Answer 3

In X and Y, there are two that can be found on Routes 10 and 11, respectively. However, if you're looking to get more than two, then Super Training is a great way to farm Evolutionary Stones. If you beat the mission "Follow Those Fleeing Goals!" fast enough, then you will be rewarded with a Thunder Stone as well.

Source

Hope this helped!