Mega Man Zx - Nintendo DS Play as either a male character named Vent, or as a female named Aile -- Vent is bigger and more powerful, while Aile is smaller and more agile Biometal is the key - strategically attack bosses without damaging its Biometals, so Vent and Alie can absorb its power with no degradation Transformations offer a range of different abilities -- players can also transform into new Model X types like Model HX, Model LX and more Unlock additional areas of the map by using different Model X forms' powers Real time info system engages both screens of the DS system