When Mega Man X was attacked by the revived Maverick Wire Sponge Limited, they fought and the Limited parasite in Wire Sponge's body feared X's strength. To save itself, the Limited left Wire Sponge's body and attempts to control X. The Limited's core is destroyed by Zero before it reaches X, but the organic material which bestows Limited's natural abilities splattered on the X-Buster and infected it, causing it to mutate into the powerful Clear Buster (クリアバスター Kuria Basutā?). With the Clear Buster, X is able to use any Special Weapon he had used before in the past, even without their chip equipped in his buster.
Later on, after defeating all eight Limit Reploids, the Clear Buster began to evolve into the Clear High Buster (クリアハイバスター Kuria Hai Basutā?) during the fight against Schmitt, causing great pain to X. Zero tries to protect X and has an evenly fight against Schmitt, but as Schmitt tries to attack the defenseless X, Zero protects him and is knocked out. The transformation of X's buster is complete and X uses his new buster against Schmitt, wounding him. The Clear High Buster further increases X's attack power, its highly destructive power depending on how healthy X is. Schmitt escapes to be healed by the Mother Limited, but it absorbs him and creates "iX" (X).
When fighting "iX", the Limited in X's buster spread to his body, becoming the Clear Armor to protect X. Besides the Clear High Buster's abilities, the Clear Armor has the ability to absorb any enemy attacks and instantly repair damage, but at the cost of X's freedom as he is losing control over his body. When X and "iX" attack each other at the same time with a powerful shot, X destroys "iX" and "iX" destroys the Clear Armor, freeing X from the Limited.
In Rockman X Mega Mission 2, it is revealed that small traces of the Limited remained in X's arm, which reacted to the Limited Field set up by the Order Breakers and made X able to use Special Weapons again, but these traces didn't evolve into an armor. After defeating four Mavericks, X succumbs to the field's effects and is captured by the Order Breakers.
The Clear Armor appears in the manga adaptation of the history in Rockman Remix.
|Mega Man X Series Armors and Power-ups|
|"First Armor" • "Second Armor" • "Third Armor" • Fourth Armor • Falcon Armor • Gaea Armor • Blade Armor • Shadow Armor • Glide Armor • Neutral Armor (Icarus Armor • Hermes Armor) • Ultimate Armor|
|Black Zero • White Axl|
|Rockman X Mega Mission armors|
|Clear Armor • Replicapture • Energy Armor • Neo Armor • Giga Armor • X Armor • All X Armor|
|X's armors • Zero's Forms • Hyper Mode|