Route 13, Route 16 (x2), Route 17, Parfum Palace, Ambrette Town, Couriway Town, Victory Road, Lysandre Labs and Route 18. :)
You can find it via Pickup:
Level 21-30 - 3%
Level 31-40 - 5%
Level 41-50 - 10%
Level 51-60 - 10%
Level 61-70 - 10%
Level 71-80 - 10%
Level 81-90 - 10%
Level 91-100 - 10%
And you can buy it in Lumiose City and the Battle Maison.
Hope I helped. :)
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