Sigma/Mega Man X4

In Mega Man X4, Sigma assumed a Grim Reaper-like appearance.

First form
When Sigma is revealed as the true mastermind and battles X or Zero himself inside the Final Weapon, Sigma's appearance is hidden by a cloak and he is armed with a beam scythe, resembling a Grim Reaper. This form can only be damaged by X's Rising Fire or Zero's Ryuenjin.

Attacks:
 * Shot Attack (ショット攻撃) - Sigma releases projectiles.
 * Scythe Attack (鎌攻撃) - Swipes the area with his scythe.

Second form
After taking enough damage, Sigma's cloak is burned out, revealing his new body. Although this is the same body, Sigma recoves his health and changes his attack methods.

Order: Scythe Throw > Laser Attack > Boomerang Attack or Laser Eye

Attacks:
 * Scythe Throw (鎌投げ) - Sigma throws his scythe and it spins around him.
 * Laser Attack (レーザー攻撃) - Sigma throws his scythe in the player's direction. After hitting a surface it will release lasers on the surface.
 * Boomerang Attack (ブーメラン攻撃) - If his scythe hits the floor, Sigma releases four boomerangs from his shoulders.
 * Laser Eye (レーザーアイ) - If his scythe hits a wall, Sigma fires lasers from his eyes.

Third form
In his final form, Sigma controls multiple bodies, including a cyborg body named Gunner Sigma (シグマガンナー), a slime body named Earth Sigma (アースシグマ) and mini bodies shaped like his head.

Mini Bodies
Three metallic objects resembling Sigma's head, each with an element. The red head releases fireballs, the yellow head electricity, and the blue head has a freezing breath.

Attacks:
 * Flame Bullet (炎弾) - The red head fires four sets of fireballs.
 * Electromagnetic Bullet (電磁弾) - The yellow head releases six spheres from its forehead, with split into electric currents after hitting a surface.
 * Ice Fog (氷霧) - The blue head releases a cold fog from its mouth.

Earth Sigma
Earth Sigma appears on the bottom left of the room.

Attacks:
 * Spike Attack (トゲ攻撃) - When Earth Sigma appears, spikes appear on the right wall and Earth Sigma attempts to push the player to them.
 * Slime Body (スライムボディ) - Earth Sigma starts sucking debris, also pulling the player, and releases the debris.

Gunner Sigma
Gunner Sigma apears on the top right of the room.

Attacks:
 * Clear Laser (薙ぎ払いレーザー) - Gunner Sigma fires a laser beam that covers the whole floor.
 * Tracking Laser (追尾レーザー) - Gunner Sigma fires a laser beam on the player's direction.

Data
Mega Man X4 Damage Data Chart (X) Mega Man X4 Damage Data Chart (Zero)