Model P

Hidden Phantom - 'The Shadow Mega Man'

History
One of the Biometals stolen by Serpent during the first ZX game, Model P was given to Purprill the Mandroid and Protectos the Goreroid for protection. After being acquired by Vent/Aile, Model P is merged with Model X forming Model PX.

His password is Umbra Profess, roughly Latin for 'Shadow Art'.

Without the power of Model X, Biometal Model P has a new owner in Mega Man ZX Advent. The Biometal is shown as used by the mysterious character, Siarnaq. Like Phantom, Siarnaq's devotion to carry out orders seem to be second to none, but just like Aeolus, he lacks compassion. Siarnaq also has several unique sprites that he doesn't share with his fellow Mega Men, such as a hunched-over stance and altered running and walking stances much like a ninja's, which further attributes to his cold and unapproachable nature.

Power and Abilities
Model PX's weapons are Kunai (throwing knives), and Shurikens. Attacks and abilities specific to this Model include the Shadow Dash (an Overdrive move) which allows the user to dash through enemies, a barrier that is summoned for defense against one strike (modeled after the charged version of Rolling Shield used by X), Hanging Wedge, an ability that allows the user to stick to walls ceilings and some obstacles, Radar Scope, a radar that shows an enemy's position, and Night Scope, an ability allowing PX to see further in the dark. The kunais themselves are fired from the gauntlets and early concept art for Model PX shows the wall-clinger having a more fork-like design and possibly a shuriken shield technique before being replaced by the barrier.

Unlike the other biometals, activating Overdrive doubles PX's overall damage as opposed to providing his attacks with an elemental power (although PX is non-elemental).

The difference between Model P and PX is that PX has a mask that covers the nose and shows the eyes while P's whole face is shadowed (caused by when Siarnaq wears a scarf), hiding his face and giving him a true ghost appearance. PX can shoot out a cross star and a shield, while P shoots a cross star and six mandala stars. PX, however, is forced to use Overdrive to be able to Shadow-Dash while Model P, in Siarnaq's use, can do so without such need for tapping into Model P's power.