Dark Hold

Dark Hold (ダークホールド) is a Special Weapon obtainable in Mega Man X5 by defeating Dark Dizzy. It is able to stop time for X and Zero's surroundings, and uses Weapon Energy until it is shut off. Because it is activated as soon as the Special Weapon button is pushed, it cannot be charged. To deactivate the Dark Hold, either simply go to the weapons screen and choose another Special Weapon or use a Giga Attack.

The Skiver is one of, if not, the only boss that is frozen by this weapon - all other bosses are immune to the Dark Hold's time-stopping abilities. 

Trivia

 * Upon activation, X and Zero's surroundings will invert colors.
 * This weapon is immensely helpful in successfully navigating through the latter half of the first Fortress Stage, which contains lethal laser beams reminiscent of Quick Man's stage from Mega Man 2. Note that it is not absolutely necessary, as there are ways to dodge the laser beams successfully, even without Dark Hold. People have even cleared the area with Gaea Armor X, which cannot use special weapons.
 * When used against Dark Dizzy in the boss refights, it will only consume one unit, and the screen will only flash white for a split-second.
 * Zero uses this move as his level 3 hyper combo in Tatsunoko vs. Capcom: Ultimate All-Stars.