Question

Is an ability capsule a once use item?

Comments

I think so..

Answer 1

>It is available as a prize from the Battle Maison in Kalos and Hoenn, for 200 BP. It has no effect in battle or if given to a Pokémon to hold. It is consumed after use. -bulbapedia http://bulbapedia.bulbagarden.net/wiki/Ability_Capsule

So yeah you can only use it once.

///Jofly