At the main menu go to Multiplayer (4th option). Choose the third option then the 2nd option. You will be taken into your Friend Card edit menu. Go to the 4th character set by pressing select 3 times. Erase everything and insert these passwords.

Password	Effect
7TY2AE6KLUL8	Unlocks a Final Fantasy Agito XIII icon.
TCAMABR3ADTQ	Unlocks a Final Fantasy Agito XIII icon.
HEEBANRLTGS	Unlocks a Final Fantasy Versus XIII icon.
NGAA3NMB3URGR	Unlocks a Final Fantasy Versus XIII icon.
28C7KMT23M48	Unlocks a Final Fantasy XIII icon.
HK4A3ST6HA3S4	Unlocks a Final Fantasy XIII icon.
SCHKJKDB3CH6C	Unlocks Icon Number 303.
HMM48AC4JH3	Unlocks Icon Number 304.