Okay accroding to some mangahelpers forumers,its Kyoraku
He uses a new technique dunno whether in bankai or shikai mode.His power has something to do with colour?

Example,he can control the "game"/opponent.And Starrk is undergoing a new transformation?

Back to original form?
Don't take this too seriously as these are just bits and pieces from forumers there.
Added on September 14, 2009, 11:01 pmUpdate:Just found out it was properly translated already.All credits goes to BA
Spoiler:
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Source : 2ch
Credit : Nja
Verification : Confirmed
Copied from BA and posted by czeria
ăăă âbvOTKk1mXg ïŒ2009/09/14(æ) 19:46:02 ID:5Vqg01x90
ăă§ăŻăćșăăăźăŻäșŹæ„œăčăżăŒăŻăźćœ±ăăćșăŠăă
The one who stabbed was Kyouraku and he came out from Stark's shadow.
ćăźèœćăŻăç«„ïŒăă©ăïŒăźéăłăçŸćźă«ăăèœć
"My ability is to turn a child's play into reality"
ćœ±éŹŒăȘăćœ±ăèžăŸăăăèČ ăăé«éŹŒăȘăé«ăă»ăăćăĄïœèČ ăăă°æ»ćăŠă°çïœ
If you're the shadow-monster, you lose if your shadow gets stepped on.
If you're the tall-monster, you win by being the taller one. You die if you lose and live if you win. (TN: I think this refers to some traditional Japanese children's games)
ćăźććïœăźé ćă«ć
„ăŁăăæ±șăăăăă«ăŒă«ă§éă°ăȘăăăȘăăȘă
According to the naming of the sword, once you go into that area, you have no choice but to play by the rules.
ă«ăŒă«ăéăłæčăȘă©ćèȘèș«ăæ±șăăæŻăćăăăăă§ć€§ć€ăȘăă ăïœ
The rules and way to play is decided by the sword itself, and it's a chore to be pushed around by it~
æŹăăăăć§ăŸăăă€ăéŹŒăç°èČăăšäșŹæ„œăăčăżăŒăŻă«æ»æ
The duel is starting,
"Iroki, haiiro" (Monster of color, gray) Kyouraku says and attacks Stark.
ăčăżăŒăŻăăćăèœăšăăăăăăȘæèŠă ăŁăăăăăȘć·ăăăȘăăȘ
ăăăăăăäżșăźćăăăć ŽæăŻç°èČăăă°ăăæ©ăż
Stark: "Somehow even when i feel I've been cut down, I don't see that kind of wound...
The part where I was cut is gray... a bit of a worry
äșŹæ„œăăăăăă©ăăăăă ăïŒćăźçȘă ăèČăæćźăăŠæ»æăăăă ïœ
Kyouraku: Oi oi what are you doing? It's your turn, you have to give a color to attack
ăčăżăŒăŻăïŒăăă€ă«ăŻç°èČăçĄăïŒă€ăéŹŒăçœă
Stark: (He doesn't have anything gray...) Monster of color, white.
äșŹæ„œăźéĄèČăć€ăăèäžă«ăăăć·ăèČ ăăăăăŸăăèĄăźéăćčăćșă
Kyouraku's expression changed and on his back was a splash-shaped wound and a tremendous amount of blood is sprayed out.
äșŹæŽăăăăæè§ă«ăŒă«ăăĄăăŁăšă„ă€ăăăăŠèĄăăăšæăŁăăă ăă©
ăăăăăèȘćèȘèș«ă性ăăĄăŒăžăéŁăăăæ»æă«è»ąăăéă, ćŒ±çčăăăŁăŠæ»æăăă°çžæă«çč性ăźăăĄăŒăžăäžăăăă
ăăăăăăăăŁăĄăăăźăăăă ăăăăăăŻăăăă„ăïŒïŒăă
Kyouraku: Shit. After all the pain of thinking about trying to explain the rules a bit at a time.
To think about what will instead be a large damage to yourself and turn it to an attack. And you can give your opponent a large blow by aiming for the weakness.
You already understood it...This is why you're a pain in the ass!!
(TN: Essentially to name the color you have on yourself, and do the damage to the opponent. This is why Stark was able to damage Shunsui badly by naming "white")
ăă
ăčăżăŒăŻăăäșăæ§ă ïŒïŒ
ăăăăăïŒăȘăă§äżșăŻăăăȘćŒ·ăăă€ăšæŠăăȘăăă°ăȘăăȘăăă ïŒïŒă
Stark: Right back at you!! (Why do I have to fight someone this strong?)
ăčăżăŒăŻćæłăž
ćŒ±ăăă€ă矚ăŸăăăäżșăźćšăă«ć±
ăăă€ăŻăăă«éȘžă«ăȘăŁăŠăăŸă
ćŻăăăăïœèȘćăźéă2ă€ă«ăăïœă©ăŁăĄăć
ă ăŁăăćżăăĄăŸăŁăïœ
ćŒ±ăăă€ăŻçŸšăŸăăă矀ăăźäžă§çăăŠăăă
äżșăšćăăăăȘćŒ·ăä»Čéăć
„ăă°ïœ„
Stark's flashback
I envy the weak ones. The ones around me will soon become corpses.
Because of the loneliess, I have split my soul into two, I've already forgotten which one of us is the original.
I envy the weak ones. They are able to live in groups.
If someone as strong as me joined as my comrade...
ăšăŁăă«çźăźćă«ăăăăæăăăăăăæŹăăčăżăŒăŻ
Stark cut across the Happi (Kyouraku's captain coat) that was thrown at him.
ć
šèș«é»èŁ
æă«ăȘăŁăäșŹæ„œăăă€ăéŹŒăé»ïŒ
Kyouraku is now all in black. "Monster of color, Black!"
ăšă°ăŁăăăčăżăŒăŻăæŹăŁăæă§
Stark got cut open everywhere.
ćźă§ă
End.
ăăă âbvOTKk1mXg ïŒ2009/09/14(æ) 20:45:20 ID:5Vqg01x90
ă©ăŁăĄă§ăăăć§è§Łăćè§Łăćă«ć„ă«ć€ćăŻçĄăăŁăăăă«èŠăăăźă§ăă
ăă ćă«ćăăŁăŠè©±ăăăăŠăæćłæă«æăŁăŠăăćă«è©±ăăăăŠăæ§ăȘ
æ°ăăăŸăăć·ŠæăźæčăŻăŸăć„ăȘèœćăȘăă§ăăăïœïŒ
Nja doesn't know if it's shikai or bankai, and there's no change in the shape of the sword.
It's just that when Shunsui was talking and pointing with his sword, he was using his right hand.
It's worth noting that maybe the sword on his left hand has other abilities?

If that's true then...