Like skittys wish
From those Pokemon you are able to sneak up on.
The 'hidden moves' are usually egg moves (I'm yet to find any that aren't), so yes, they will be passed on with breeding. In skitty's case specifically, wish is one of its egg moves, so it will be passed down. Hope I helped!
Well sense wish is an egg move for skitty "hidden moves" cough egg moves cough can be passed down