Print this Unlock Bonus Items
Have a game save at any point in FFXIII while loading up FFXIII-2 to unlock the following items. They can then be found at the indicated location.
Unlock Eternal Crystal:
In 'Key Items'.
Unlock Lightning Mask:
In treasure sphere in Serendipity, right of the entrance.
Unlock Serah Mask:
In treasure sphere during 3rd visit to the Void Beyond near 2nd Yeul.