Being a Shinigami has never been this fun.
Dark Souls features a non-canon storyline that takes place right after Aizen and his crew defected from Soul Society, in which a bunch of Mod souls go bad and reek havoc through the Soul Society. Story mode is sorta set on a path. As you proceed through you might be able to pick on of 3 fights or mini games to take on. Upon completion you may clear a new path or awarded a key to access some dialogue battle, or mini games that will progress the story. Some battles will have conditions you'll have to meet such as defeat you opponent while their speed is enhanced, and the mini games will ask you to destroy all the butterflies within the allotted time.
The game plays well and the controls are very easy. Its your basic 2D fighting game and it looks really nice and sound pretty good with the anime voice actors also providing the voices. As you fight you spirit energy bar fills up and to execute specials moves you can either preform the correct button configuration or use the touch screen. You can also customize your card deck. Your card deck contains cards that will activate different abilities such as speed, super jump, block resist and one to force your opponent to crouch. There are several different cards and as you play through the story mode you'll receive new cards.
There's an arcade mode that will allow you to pick a fighter and fight through a series of battles. A Vs. mode that lets you fight either the CPU, some one locally, or someone via Wifi. The problem with the Wifi is that no one is out there really playing the game, and if they are there are a few lag problems with it. There's also a time attack, training, and survival mode.
If you have a DS or a fan of the Bleach anime and manga series then you should definitely check out Bleach Dark Souls. It'll provided you with enough excitement time and time again.