Black Shadow

was a giant wolf-like demon with five eyes, two snouts, and six legs that appeared Naruto Shippūden: Ultimate Ninja 4.

Appearance
At first, Black Shadow took the form of a short, stocky man in a long blue and white robe. He had tiny yellow dots for eyes, and hair coming out from the robe. In his true form, Black Shadow appeared as a gigantic wolf with five eyes, two heads, and six legs. He also has a set of large wings and a long brown tail.

Abilities
Black Shadow placed a restrain on a person in the form of a black shadow. Apparently, the restraint is so powerful that no mortal is able to escape it. He also can shoot flying spikes that home in on the foe as well as summoning a large number of shadow ninja, which he seemed to have created. He also appeared to have immense physical strength, as one slash from his paw sent Naruto flying back several feet and in another case he created several fissures through direct contact with the ground. Another ability he had was to create several tall pillar/tentacle objects from the ground around him which can be used to attack a target. He also split his body into several smaller/weaker, but faster forms. He was also able to appear from and disappear into thin air. Another ability he possesses is the ability to duplicate himself. He also had the ability to use the Bringer-of-Darkness Technique.

Plot Overview
He lived in a cave in the Tree Felling Village and required a sacrifice to keep himself appeased. Naruto Uzumaki later killed it and the village changed its name to the Tree Revival Village. He can only be killed by the flowers from the Tree of Life.

Later, Guy and Naruto travel to his cave and seeing that the demon is not around, Guy pretends to become possessed by Black Shadow, although his act does not fool Naruto even after Guy is defeated and claims that he needs more training because his mind was so overpowered by the demon.

Trivia

 * It only talks in katakana in the Japanese version.