Model W

The soul of Dr. Weil - 'The Evil Mega Man'

Model W was formed from the remains of the Dr. Weil (Dr. Vile) and Ragnarok fusion after his defeat in Mega Man Zero 4. It contains Dr. Weil's soul and corrupts all that approach it. 10 years before the game, Serpent found and was corrupted by the Model W Core. He took a fragment and used it to cause the Maverick outbreaks. In the final stage of the game, Serpent activated his fragment of Model W, but was still defeated by Vent/Aile. He used the Model W Core, filled with the power of Humans and Reploids that were killed by the Mavericks, to become a gargantuan figure (Ultimate Model W), exponentially stronger than the form obtained by the Model W fragment. The Model W Core differs greatly from the larger fragments seen in ZX Advent not only due to its vague, bestial shape (which resembles Dr. Weil's final form), but also because it is the core of Ragnarok.

Weapons available for Model W in ZX include increased physical attacks (uppercut, kicks), shooting from fingers, large energy balls, and an Overdrive that increases the velocity of his attacks. For Ultimate Model W, attacks include a storm of meteors, creating and breaking a crystal to attack with the shards, stunning powder, and leeching. Even without Megamerging, the Model W core has used abilities such as converting Reploid and humans/humanoids into Mavericks, reanimating corpses, and even causing a distortion in gravity. Model W is the only Biometal that you cannot use at all in the game.

Prometheus and Pandora are Mega Men created to be Model W's biomatch, but they are trapped in their Megamerged forms.

In Mega Man ZX Advent, it is revealed that many Model W's had been made by Albert, and that the original Model W core wasn't quite as destroyed as previously believed, as the five shards of the core had landed in the highway, the floating ruins, the plant, the tower, and the dump. Albert planed to awaken all the remaining Model W's at once and fuse them into the Ouroborus, a giant Biometal to be used by the Mega Man King. Albert himself actually does not use Model W to transform, as all the Model W's have fused into Ouroboros, instead using his A-Trans ability to morph into his battle form, the self proclaimed "Ultimate Mega Man". The artificial sky around him breaks, and forms the bits that surround him, creating his shield. In battle, Albert always remains afloat, using a set of ten bits to attack and defend himself, which commonly comes in the form of an energy barrier.

It should be noted that the real Model Ws were pieces of Ragnarok, and that the ones that resemble Dr. Weil's form are only mass-produced fragments that Albert made (of which at least seven exist, with Prometheus, Pandora, and Serpent each holding one, and Master Albert holding the rest, not to count the eight Model W Pseudoroids). Albert's Model W fusion is also very similar to Model A, as it can use Chronoforce's Time Bomb to cancel out Grey/Ashe's, as well as mimic all of the other Mega Men's special attacks, and has its own homing shots, albeit stronger. This is because Model A and Grey were made to be Albert's backup system in case something should happen to him before the "Destiny of Destruction" was seen through. In effect, Albert's Model W is also built to counter Model A's A-Trans, as the easiest way to neutralize his shields is by targeting all the fragments with Model A's homing shot.

It should be noted that Albert can perform all of his attacks, both copied and original, in his own transformed state, whereas Mega Man Model A must take the form of the attacks original user. In this regard, Albert's abilities are more similar to those of Mega Man X, which gives another kind of significance to the title of "Ultimate Mega Man".