So if I change my Croagunk's ability from Poison Touch to Dry Skin, will I be able to switch back to Poison Touch if I so wish to? And makes sense about the 'not being able to change non-HA to HA' thing, the ability to do that would be a bit cheap.
Actually, I was wrong. I just tried this out ingame, you cannot change a mon's Ability with the Capsule if it is an HA. (tried it on my Magic Bounce Espeon)
Also, how can you be certain as to what form of Pumpkaboo/Gourgeist you have?
You... really have to just guesstimate it. Catch a couple of Pumpkaboos, and check the Dex. They will record each size if you have them, and then you can check the mons. Each size also has a different cry. And Super size is pretty obvious, if you're going for that.
At 200 BP, the ability to do that would be extremely, extremely expensive.
Honestly, without the ability to unlock Hidden Abilities, the Capsule is a massive waste. It's easier and faster to breed for a new ability than to pick up a Capsule.
Also, I heard that you cannot change a Hidden Ability with an Ability Capsule at all, that you can't change out of it, either. I'd love some confirmation that you can.
Actually, the Capsule is easier to get than you think. I currently have gotten 5 myself due to playing the BM. And, the Capsule is not a complete waste. For example, what if you were breeding for Huge Power Marill, and get one with perfect IVs but has Thick Fat? Ability Capsule to the rescue. Also, point on the last part, I just tested that out and it's true.