Bleach Wii: Fast-paced and Fan-serving
Bleach: Shattered Blade was a game I largely bought because I am myself something of a fan of the Bleach anime/manga series. I do also like fighting games, but it's no secret that other games handle the genre better--so I wasn't buying it expressly for that fact.
That being said, I didn't know what to expect from B:SB, so it was a new experience when I loaded it in my Wii and fired it up. The combat in Bleach: Shattered Blade is a strange mix of flurries of activity punctuated by moments of squaring off; regular blows have a strong tendency to be deflected if the enemy instigates any kind of attack while being attacked, lending to a strange sort of hybridized offensive defense. Critical Attacks, which are slower, are mostly unstoppable (including by blocking) and instead require dodges; a player with quick reflexes may be able to avoid them even at close range, but many characters have a deceptively large area in which they can strike with even simple blows. Attacks of all sorts consume a Spiritual Pressure gauge, which must be replenished over time, preventing infinite streams of spammed attacks but also inserting delays in battle.
Bleach: Shattered Blade includes a character not seen in either the anime or the manga, which to me seemed a bit exciting when I first read about it, but the character turned out to be anti-climactic in terms of abilities (not to mention the comical mismatch between the appearance of his character and his voice actor's timbre).
The plotlines in the game are somewhat forced as well, but not entirely worthless, at any rate; that being said, most fighting games are almost completely devoid of plot to begin with, so I suppose it isn't a major complaint.
The game's graphics are a strange mixture of anime-ish cel shading and 3D, and the characters have that kung-fu-movie tendency to not match up anything they're saying with the movements of their mouths. This is especially true of victory salutes/taunts, wherein the character's mouths often don't move at all while speaking is taking place. Perhaps this is less of a concern to you, but to me it made the characters seem more sterile and robotic--but part of the reason I like the Bleach animation series is because the characters seem so lively and vivid: thus, my dissatisfaction with this element.
One good thing about B:SB is that it makes most characters quite serviceable when fighting against one another; playing a Captain from the series against, say, a seated officer doesn't mean that the Captain has a major power advantage. This means that players are, for the most part, free to play as their favorite characters without having to worry about being slaughtered by virtually everyone else's superior techniques. There are still a few exceptions to this rule, but again, characters that just don't work are another staple of many fighting games.
At the end of the day, Bleach: Shattered Blade is a fighter of bread-and-butter quality; though it does some things you won't find in other fighters, it isn't spectacular in the areas of commonality, either. If you're a fan of the series and don't yet own a Bleach game, you'll probably like this game a lot--mostly for the wide variety of characters available to be played. Otherwise, you could probably do better with a different fighting game series, in which your movelists will have some continuity with other games--barring a major improvement in quality, it's unlikely the Bleach fighting series will go too much further.