Mega Man X2/X-Hunters Base 5

Before entering this stage
First of all, remember to refill the Giga Crush! A good spot is early in the Flame Stag's Volcanic Zone.

Locations to refill Sub-Tanks using the Silk Shot:

Central Computer, revisited
This is exactly Magnet Centipede's stage revisited, up until the first sub-boss room.

Open question: if you missed the Heart or the Sub-Tank when fighting M. Centipede, can they be found now?

Sub-boss: Zero
You will only fight Zero if you missed one or more of the three Zero parts. The latter could be obtained by fighting the three X-Hunters in the first ight Maverick stages.
 * Weakness: Speed Burner

Neo Sigma
Sigma has three main attacks, plus one.
 * Weakness: Sonic Slicer


 * 1) Sigma will dash across the arena, and if it hits Maga Man X, the latter will be sent flying across the room. Jump to avoid it.
 * 2) Sigma will often disappear in mid-air, then rematerialize vertically above Mega Man X and dive on it head (and claws) first. Dodge that attack by dashing across the room.
 * 3) It will surrounds itself with purple enegy spheres that home into Mega Man X. You can dodge that attack by climbing up a wall and then dropping and jumping.
 * 4) One more attack, unlocked when Sigma is weakaned, is similar to the charged Electric Spark from Mega Man X 1. Dodge it climbing on a wall.

Using the Sonic Slicer, keep shooting, as the bouncing boomerangs will easily get into the way of Sigma.

Sigma Virus
Its energy bar is hidden, but its color is a good indicator of its remaining energy. Sigma Virus starts out green, then goes across the color spectrum from blue to red (pale blue, dark blue, purple, orange, red).
 * Weakness: Strike Chain

Each "color" of the virus takes about 4 hits from the uncharged Strike Chain and the fully-charged X-Buster, but it is immune to any other special weapon.

Using the Strike Chain, keep hitting the Virus. You know that your attack connected when the background flickers.