Chimera Technique

The Chimera Technique is a forbidden technique that was developed by Hiruko, a missing-nin of Konohagakure, in order to compensate for his lack of natural special abilities. Hiruko uses the technique to integrate the bodies of others with his own, allowing him to obtain any Kekkei Genkai they possess, as well as other special physical traits, as well as absorb their chakra. The technique is also used by Hiruko and his followers to create formidable creatures which bear the traits of multiple animals. In Naruto Shippūden 3: Inheritors of the Will of Fire, Hiruko has used this technique to steal four Kekkei Genkai: Storm Release, Dark Release, Steel Release, and Swift Release.

In order to properly acquire Kekkei Genkai, certain conditions must be met, such as location, people with Kekkei Genkai, and the light of a total solar eclipse.

Ni could use this technique to merge with her lion-like beast, and San was able to use it to merge with Ichi and Ni, becoming a chimera-like beast.

Influences
A chimera is a mythological creature composed of the parts of multiple animals, and is also a genetic term for hybrid animals with more than one DNA pattern. This is likely a reference to the fact that Hiruko developed the technique as a way to adopt the genetically inherited abilities of other shinobi, regardless of his own bloodline.

Trivia

 * The technique's name is a pun, similar to certain techniques of Kumogakure-ninjas, in which it has an English name with a given kanji that somewhat match the pronunciation.