You can only unlock 4x FreeLancer costumes in game with the method below. After you have meet the requirements ,you will need to UPDATE DATA on those two games first before you UPDATE DATA on your Bravely Second End Layer to receive the costumes. On the EU Version the Freelancer costume can be brought from the weapon shop in Chompshire for 200,000 pg.

Costume	How to unlock
FreeLancer Costume x1	Register your Bravely Defult Flying Fairy 's bravely code on Member's site.
FreeLancer Costume x1	Register your Bravely Default For The Sequel 's bravely code in game.
FreeLancer Costume x1	Clear the Ending of Bravely Default For The Sequel.
FreeLancer Costume x1	Clear the True Ending of Bravely Default For The Sequel.