"Bleach Movie: Memories of Nobody"The almighty gods of DB have answered your prayers. Here is the English subbed version. If you're having problems watching it, as always read the freakin' orange box on top of the page.
Bleach: Memories of Nobody is an animated film, directed by Noriyuki Abe and written by Masashi Sogo. It debuted in Japanese theaters on December 16, 2006. It is set immediately after the Soul Society rescue arc, as Ichigo returns to the real world. This places it during the same time frame as the anime-only Bount arc.
Spoiler Warning!! [+/-] Show/Hide Synopsis... In Karakura Town, unidentifiable spirits called "blanks" (vacant souls) begin appearing en masse. While attempting to deal with these strange souls, Ichigo Kurosaki and Rukia Kuchiki meet Senna, a mysterious shinigami who wipes out most of them fairly quickly. Senna is evasive about her squad assignment, so Ichigo is forced to follow her while Rukia tries to find out what's going on.
Meanwhile, in Soul Society, the real world is suddenly reflected in the sky, so Tōshirō Hitsugaya and Rangiku Matsumoto are sent to investigate. They meet up with Ichigo in the real world, who has lost track of Senna by this point. They discuss the events at the Urahara Shop, where Kisuke Urahara explains the reason for the strange occurrences. He explains that a soul caught between the two worlds is acting as a conduit, linking them together.
After finding Senna again, the two spent most of the evening together, with Senna being fascinated by just about everything in sight. However, she begins to remember when she died, and decides to visit her grave. There, she is attacked by a mysterious group of people wearing vaguely shinigami-like clothing and sporting odd weaponry. Senna is no match for them, but is rescued by Ichigo, who severs the arm of the one attacking Senna. The group then disappears without a trace.
Senna is eventually revealed to be this soul, and a fair amount of the Gotei 13 shows up to deal with the problem. Ichigo tries to defend Senna, but before either side can act, the mysterious group from before shows up. They identify themselves as the "Dark Ones" and set their sights on Senna once again. The many vacant souls wandering around fuel their abilities, making them almost impossible to stop. Despite Ichigo's efforts, they succeed in escaping with Senna.
In a mountainous area, Senna is attached to a strange device, which is fueled by the same vacant souls as the Dark Ones use. As the device powers up, it begins to form a gate with Senna at its core.
Unwilling to give up, Ichigo goes looking around town for her, eventually finding a massive portal sitting on the river. It leads to a strange mountainous region located between Soul Society and the real world. As he enters it, Rukia heads to Soul Society to get reinforcements. Ichigo is left facing the combined might of the Dark Ones, barely able to hold his own.
In Soul Society, Mayuri Kurotsuchi explains to the other captains that the Dark Ones are attempting to break down the barrier between Soul Society and the real world altogether, destroying both worlds. Steps are taken to seal the rift just as Rukia barges into their meeting, begging for help. However, she is turned down by General Yamamoto, and is only able to bring Renji Abarai back with her. At the portal, as Rukia and Renji prepare to enter to help Ichigo, Hitsugaya and Matsumoto appear to offer their help, as well.
Within the other dimension, Ichigo finds himself overpowered by the sheer number of vacant souls the Dark Ones have at their command. He is saved by the timely arrival of Kenpachi Zaraki, with Yachiru Kusajishi hanging from his back. Aside from Zaraki, Soifon, Izuru Kira, Byakuya Kuchiki, Tetsuzaemon Iba, Shūhei Hisagi, Ikkaku Madarame, and Yumichika Ayasegawa have also arrived to help. Along with the four that originally entered the portal, the group makes short work of most of the Dark Ones, leaving Ichigo to battle their leader. Though it takes Ichigo longer, he is victorious, as well.
Back in the real world, all the shinigami exit the portal with Ichigo carrying Senna. Despite having broken the device meant to break down the barrier between the worlds, the process is far enough along that it doesn't go away. As Senna is the initial reason behind it, she chooses to sacrifice herself to seal the portal. She survives doing so, and is taken to her grave by Ichigo so she can pass on properly.