Sigma/Mega Man X7

Sigma is the final boss from Mega Man X7. Having returned yet again under the alias "The Professor" (センセイ), he manipulates Red Alert to harness D.N.A. data of both X and Zero using Axl's Copy Chip. After Red's defeat, X, Zero and Axl eventually find Sigma, claiming to persist in returning again and again.

First form
After having a rematch with the eight Red Alert vigilante Reploids, the Maverick Hunters find Sigma. He uses a long double barrel rifle that can be split into two, with a rapid fire function as well as a large laser cannon. This form is weak to X's and Axl's Wind Cutter and Zero's Souenbu. This fight takes place in 2D perspective.

This form of Sigma can be handled rather efficiently by crouching behind one of the bumps of the stage and firing back at him. When he teleports to fire his cannon, X, Zero and Axl only have to crouch and attack, while later attacking with the weapon he is weak as.

Attacks:


 * Bound Shot (バウンドショット) - Sigma fires three shots with his rifle at three different angles, the projectiles can rebound out of walls.
 * Double Shot (ダブルショット) - Sigma separates his rifle into two and fires an array of shots while hovering in the background.
 * Cannon Laser (キャノンレーザー) - Sigma teleports to one side of the room, brings out a cannon and fires a large purple laser.
 * Guard (ガード) - Sigma defends himself with his rifle.

Second form
After being defeated, Sigma goes into his final form. This form makes Sigma gigantic, the Hunters only being able to reach him by standing on some floating platforms. He is weak to Splash Laser, Explosion and Gaea Shield with X and Axl, and to Hadangeki, Suiretsusen and Gokumonken with Zero. This fight takes place in 3D perspective.

This form of Sigma is rather simple to handle, as he depends much of distance and projectiles. As X has good range, he can strike with a charged Splash Laser. Axl has the advantage of using different weapons that can deal extra damage up close, so just equipping the G-Launcher is enough to deal serious damage to Sigma. Zero can use the stance of his Gokumonken move to deflect the green projectiles that Sigma fires back at him and the Hadangeki to attack him when he is close.

Attacks:
 * Dash Punch (ダッシシュバンチ) - Sigma teleports far away and goes straight to the hunter with a giant punch.
 * Green Projectile (绿弾) - Sigma fires some green large plasma spheres that will land where the hunter is standing. The projectiles can be reflected back to Sigma with Gaea Shield or Gokumonken.
 * Red Projectile (赤弾) - Sigma teleports close to the hunter and fires red spheres from his mouth. The projectiles can be destroyed.
 * Laser (レーザー) - Sigma fires a large purple laser from the gem on his belt, moving from side to side.
 * Rotational Attack (回転攻擊) - Sigma teleports far away, spins with his arms streched out and fires red spheres that will land around the platforms.

Trivia

 * In Mega Man X7, Sigma's destroyed First form shown in the ending cinematic, is similar in appearance to Sigma's first form from Mega Man X6.