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

Routes 10 and 11 both have one non-repeatable thunder stone. Secret Super Training can also yield a Thunder Stone. On Route 18, from Psychic Inver, you can get another. They can also be obtained from Spiky Rock 2.

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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!