Bleach: Shattered Blade
Unlockable Aizen Sousuke
You must finish Arcade Mode with Ulquiorra.
To get Kisuke, defeat Mayrui in arcade mode.
Unlockable Old Man Yama
To unlock Old Man Yama as a playable character, you must beat Arcade Mode with Rukias Capton.
To play as Yoruchi, simply complete Tutorial Mode.
To unlock most alternate uniforms/outfits in the game, you must first unlock the character in question and then win fifteen battles in Versus Mode as that character.
Unlockable Treasure Box
To complete the game's art gallery, simply unlock all of the characters. After you do so, the Treasure Box will appear in the shop. The art gallery will be filled up thereafter, primarily with character drawings and other images.
Unlockable Urahara Shinigami Costume
To unlock the Urahara Shinigami costume, you must unlock all other unlockables in the game. Thereafter, it will become available to you for purchase.