Quote Originally Posted by Orithan View Post
Actually, there are abilities that cannot be swapped or copied ingame due to what I expect to be technical problems arising from swapping or copying. Namely Multitype and Colour Change (and possibly Zen Mode). Granted, I discovered this in Diamond when playing around with Role Play, Maybe Etherealness will be one of those that you cannot swap or copy.
Yes, but I don't think the ability described above would create enough technical problems to prevent being swapped.

Actually, at that rate, every made-up ability's creator could make the ability unswappable if he or she didn't want Pokémon that couldn't naturally get the ability to have the ability.