Layton’s Mystery Journey: Katrielle and the Millionaires’ Conspiracy has been updated to Version 1.2. There's no official patch notes for the 3DS version, but the iOS version did offer up some tidbits for its latest update. I'm not sure whether they pertain or not, but I'll include them below.
- new outfit
- corrected minor issues
- option to redeem campaign promo codes via Promo Prizes has been removed from the Bonuses menu section due to the Real World Puzzle Solving Campaign ending