Biometal

Biometal (ライブメタル Livemetal?), is a substance swords that stores the data (eg. personality or battle data) of a Reploid or human, and can be created by more than one process.

Characteristics
Biometals are sword like mechanical artifacts which can be held by a single hand. However, Biometals are no ordinary technology as each of them houses a soul, usually of a legendary hero from a past era. Biometals are generally designed to resemble the original forms of the souls within, making them easy to recognize. Biometals are also distinguished by a protuding round plate on the front with a pair of horizontal lights for eyes, giving it the appearance of a face. Although they lack a mouth, they are still able to speak directly to the minds of compatible individuals.

However, Biometals are better known for their ability to merge with a person, giving him/her incredible power; this ability is called Megamerge and it works for both humans and Reploids.

Megamerge
Biometal uses the M.E.G.A. (Meta-Encapsulated Granule Awareness) System (R.O.C.Kシステム R.O.C.K. (Rebirth of Crystallized Knowledge) System?), and can Megamerge (ロックオン R.O.C.K. ON?) with a Chosen One (also referred to as a Biomatch). In a Megamerge, the Biometal becomes the user's living armor, and gives its user the abilities of whom it is based upon, becoming a Mega Man (ロックマン Rockman?). Biometals are generally referred to using an initial, eg. Model Z (Zero), and generally titled as Mega Man Model _ (Model initial here) during Megamerge.

Biomatches are individuals destined for a particular Biometal. Most Biomatches tend to have similar personalities to the Biometals they are destined to use, aside from Models O and W, whom have shown no visible consciousness. Only the Biomatches can hear the voices of the Biometals, especially when the Biometal urges either Grey or Ashe to Megamerge. Only a few of the Biometal have shown to be compatible with more than one individual, as in the case with Models Z, X, A and W, yet Vent and Aile are able to utilize other Biometals through Model X while Grey and Ashe can copy their Mega Man forms using Model A's A-Trans ability.

The fusion between Chosen One and Biometal appears to occur at the genetic level, as Model A's A-Trans is able to copy the exact form of a transformed Mega Man down to the subject's species and gender. The Chosen One retains full control of his/her actions, but the Biometal can still speak independently and may cancel the transformation at will.