You can't it's as simply as that.
The reason being is because you can't catch a Hidden Ability Carvanha/Sharpedo in game. There's only ever been one way to get a Hidden Ability Carvanha/Sharpedo (not counting trading or hacking) and that's through the Sparkling Sea in the Pokémon Dream World. Unfortunately the Pokémon Dream World has closed down, so currently the only way to get a Hidden Ability Carvanha/Sharpedo is by trading or hacking.
Anyway more to the point if you obtained a Carvanha with it's Hidden Ability through the Pokémon Dream World it would come in a Dream Ball. If you bred it, it would it would either end up being in a regular Poke Ball, or it would end up being in a Dream Ball (if it inherits the Ball from it's Mother).
Since you can't capture a Hidden Ability Carvanha/Sharpedo in game, there's no way to get one that has it's Hidden Ability and is inside a Luxury Ball (besides hacking), as if you tried breeding, one of the following scenarios would happen:
- Breed a Male Hidden Ability Carvanha/Sharpedo inside a Luxury Ball with a Ditto inside a Luxury Ball.
Outcome: The Child may inherit the Hidden Ability but it won't inherit the Luxury Ball, as only Females can pass down Poke Balls.
Breed a Male Hidden Ability compatible partner of the same Egg Group with a Female Carvanha/Sharpedo inside a Luxury Ball.
Outcome: The Child would inherit the Luxury Ball but won't inherit the Hidden Ability, as Males can only pass down Hidden Abilities when bred with a Ditto.
Breed a Male compatible partner of the same Egg Group with a Female Hidden Ability Carvanha/Sharpedo inside a Luxury Ball.
Outcome: This would work, but as I said before you can't catch a Hidden Ability Carvanha/Sharpedo in game, so there's no way you can get a Female Hidden Ability Carvanha/Sharpedo inside a Luxury Ball.
Breed a Ditto inside a Luxury Ball with a Female Hidden Ability Carvanha/Sharpedo.
- Outcome: The Child would inherit the Hidden Ability but not the Poke Ball, as Ditto has no impact on the type of Poke Ball inherited.
TL;DR: I just explained in a lot of detail that you can't get a Hidden Ability Carvanha/Sharpedo inside a Luxury Ball, as there's no way to obtain a Hidden Ability Carvanha/Sharpedo in game and thus no way of capturing one with it's Hidden Ability inside a Luxury Ball.
Edit: This answer was posted before the release of OR/AS, so you might be able to get a Hidden Ability Carvanha/Sharpedo on there, but you'll have to wait and see once it is released.
