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After sacrificing himself for X, Zero comes back to life as an enemy that warrants war against humanity t-

Oh wait, wrong game.

MegaMan and Lan find the source of the virus; the obviously named Zero. The virus-infected Navi decides to fight so that his death has some meaning...

Key Notes:
IMPORTANT: If you didn't get the MystData from the junkyard in Global Area 3, you won't get Zero's chip, and he'll die for real.
Also, Zero is the only Navi that can't be fought in the Net Battle Simulator.

Boss: Zero.EXE
HP: 750
Offensive: ZeroShield (0), ZeroSaber (100), ZeroStrike (300)
Just like ElecMan, Zero teleports to your side when a single strike hits his automatic shield. You know where this is going... Attack when he's attacking you. Careful, though. His saber is hard to avoid.
After losing a lot of his health, Zero becomes invincible and unleashes an unavoidable ZeroStrike slashing blow across the screen. If you don't have a defensive chip (preferably Invis1), your health is getting creamed by a third at best.

Watch, enjoy, and comment, everyone.