Variable X

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This article lacks an official name, its title being conjectural.

"Variable X" is the fan nickname of a song heard throughout the Mega Man X series. It is commonly associated with X and Zero.

Music

Original version in Mega Man X.

The international opening theme to Mega Man X5.

Zero's unlocked theme in Mega Man X6.

Zero's death theme in Mega Man Maverick Hunter X.

Main characters
X • Zero • Axl • Dr. Light • Dr. Cain • Double • Iris • Signas • Douglas • Lifesaver • Alia • Layer • Pallette Middy • Techno • Spider • Cinnamon • Marino • Massimo • Nana • Chief R • Aile • Professor Gaudile • RiCO • ViA • iCO Sigma • Vile • Agile • Serges • Violen • Dr. Doppler • Bit • Byte • Colonel • General • Dynamo • Gate • Red • Lumine Zain • Geemel • Berkana • Gareth • Shadow • Ferham • Scarface • Botos • Epsilon • Colonel Redips
Games
Mega Man X • X2 • X3 • X4 • X5 • X6 • X7 • X8 Mega Man Xtreme • Xtreme 2 • Mega Man X: Command Mission • Mega Man X DiVE Mega Man Maverick Hunter X • Mega Man X Collection • Mega Man X Legacy Collection • 2

Damage data charts
Mega Man X • 2 • 3 • 4 (X) • 4 (Zero) • 5 (X) • 5 (Zero) • 6 (X) • 6 (Zero) Mega Man Xtreme • Xtreme 2 (X) • Xtreme 2 (Zero) Maverick Hunter X (X) • Maverick Hunter X (Vile)
Scripts
Mega Man X • X2 • X3 • X4 (X's story) • X4 (Zero's story) X5 (X's story) • X5 (Zero's story) • X6 (X's story) • X6 (Zero's story) X7 (X's story) • X7 (Zero's story) • X7 (Axl's story) • X8 (X's story) • X8 (Zero's story) • X8 (Axl's story) Mega Man Xtreme • Xtreme 2 • Command Mission Maverick Hunter X (X's story) • Maverick Hunter X (Vile's story)
Related items
Maverick • Maverick Hunters • Maverick Virus (Zero Virus • Sigma Virus) • Mechaniloid • Doppler Army • Nightmare Investigators • Nightmare Rebellion Army • Red Alert • Repliforce • Reploid • Parts • Injured Reploids • Chips • Ride Armor X-Buster • Z-Saber • Zero Buster • Axl Bullets • A-Trans X's weaponry • Armor Parts • Zero's weaponry • Axl's weaponry • Vile's weaponry Rockman X Mega Mission
Related Media
OVA	The Day of Σ
Manga	Rockman X (manga series) • Irregular Hunter Rockman X • Rockman Remix • Rockman X5 • Rockman X7 4Koma Manga Kingdom
Soundtracks	Capcom Music Generation - Rockman X1~6 • Rockman X7 Original Soundtrack • Rockman X8 Original Soundtrack Rockman X8 e-Capcom Original Special Sound CD • Rockman X: Command Mission Original Soundtrack