Zero Buster

General description
The Z-Buster is Zero's weapon in Megaman X, Megaman X2, and Megaman X3. He actually gains the Z-Saber in Megaman X2, but the Z-Buster remains his primary weapon until Megaman X4. Also, note that the Z-Buster seems to be much more powerful that X's X-Buster, as it sufficiently damaged Vile's ride armor (even though it was only half charged) while the X-Buster could not even visibly scratch it (this was perhaps due to X not being at full strength at the time as this was mentioned by Zero himself). However, in Megaman X5 and X6, the Z-Buster is less powerful than X's one because it can't charge shot, and only fire a slow and weak shot.

In the Megaman Zero series the Z-Buster is lost, replaced by the Buster Shot Gun, which Zero took from the dead Milan to protect Ciel. The Buster Shot Gun cannot charge by itself, but artworks show the deactivated Z-Saber slotted in the gun and allowed charging through the Z-Saber's own technology.

Appearance
The Z-Buster creates large, light green energy bolts that travel across the screen, as with any typical buster weapon.