As of Gen VI, you can pass down Pokéballs to the offspring. The mother's ball will be passed down, as long as it is not breeding with a Ditto. Males, Genderless Pokémon, and Ditto cannot pass down the ball. But if you, for example, have a female Clefairy in a Heal Ball, and breed it with a male Pikachu, the offspring will all be in a Heal Ball regardless of what the male's ball is. Keep in mind Master Balls cannot be passed down