Where do you find an Ability Capsule?

Question

I've been hearing a lot about these, and I was wondering where I could find one.

Answer 1

You can buy one at the Battle Maison for 200 BP.

Source

Answer 2

You can buy it at the Battle Maison in Kildoue City for 200 BP.

Answer 3

You can get it at the battle maison

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