Mega Buster

Mega Buster, known as Rock Buster (ロックバスター) in Japan, is a powerful arm cannon that is the main weapon of all of the main characters carrying the name of Mega Man (Mega Man, Mega Man X, Model X, Mega Man Volnutt/Trigger, MegaMan.EXE and Mega Man from the Star Force series).

Mega Buster
The original Mega Buster, originally called simply "P" (possibly standing for "power") in early games, also known as Arm Cannon and Plasma Cannon outside Japan, is Mega Man's main weapon used in early Mega Man games.

The Mega Buster is an ambidextrous arm cannon created by Dr. Light. It can fire three bullets of highly compressed solar energy at a time that, with the exception of the remake Mega Man Powered Up, can pass through walls. In Mega Man 4 onward, Mega Man can charge energy up to two degrees, being able to fire charged shots. In Mega Man 9 and Mega Man 10, Mega Man is no longer able to charge his shot, suggesting that it was reverted to the original version.

The original Mega Buster is a powerful weapon capable of puncturing steel and destroying boulders. A single, uncharged "Solar Bullet" can blow a five foot diameter hole in a wall of solid stone (as seen in Super Adventure Rockman).

New Mega Buster
The New Mega Buster (ニューロックバスター) is an upgrade made in Mega Man 4. Mega Man is now able to charge solar energy to increase the power of his shots, attacking with a charged shot. The buster can be charged to two different degrees: The first charge shot is bigger than normal shots, but causes the same amount of damage. A fully charged shot is bigger than the first, and causes three times more damage than normal shots.

Super Mega Buster
Super Mega Buster (スーパーロックバスター) is a modification made by Dr. Cossack in Mega Man 5. The charged shot gets more power, but if Mega Man suffers damage while charging a shot, the charged energy will be lost and he will need to charge again.

In Mega Man IV, Mega Man doesn't lose charged energy when hit, but the fully charged shot causes recoil, throwing Mega Man backwards a small distance from his current position. The recoil is also present in the opening scene of Mega Man V, where the charged shot is unable to harm Terra.

Mega Arm
The Mega Arm, known as Rock'n Arm (ロックンアーム) in Japan, is an upgrade of the Super Mega Buster done by Dr. Light in Mega Man V (for the Game Boy) to help Mega Man in his battle against the Stardroids. Unlike the Super Mega Buster, it doesn't have recoil from charged shots, and the charged energy isn't lost when hit. It can charge energy to fire Mega Man's fist like Hard Man's Hard Knuckle.

There are three enhancements for the Mega Arm:
 * MH.png MH: Can grab items from far away with Mega Man's hand. Costs 90 P-Chips.
 * CL.png CL: Can grab and attack the enemy over and over. Costs 100 P Chips.
 * Turbo Accelerator: The Mega Arm fires and charges much faster. Obtained by being destroyed four times in a row in the same stage. Can be upgraded up to two times. It's not saved by passwords, but it can be obtained again at any time.

Hyper Mega Buster
Hyper Mega Buster (ハイパーロックバスター) is a modification from Mega Man 6. Like the Super Mega Buster, Mega Man loses the charged energy if hit by an enemy, needing to recharge to fire a charged shot.


 * From Mega Man 7 onward, Mega Man's main weapon is called only the "Mega Buster".

Double Rock Buster
The Double Rock Buster (ダブルロックバスター) is the Mega Buster used on both arms. The Double Rock Buster was only used by Mega Man at the end of Super Adventure Rockman in order to defeat Ra Moon, charging a large amount of energy in both busters, which he then fires simultaneously to generate an incredibly powerful charged shot. However, it is too dangerous for Mega Man to use regularly, as it drains his energy much faster than he can normally replenish it, also causing him to overheat.

It may be a prototype or precursor to the wide-spread double-shot upgrade from Mega Man X3 with the Buster Parts for his Third Armor.

X-Buster
The X Buster (エックスバスター) is the Mega Buster Mark 17 used by Mega Man X, being his primary weapon in all games from the Mega Man X series. Like the original Mega Buster, it can be used in any arm and fires highly compressed blasts of energy, which can be charged up for extra power.

Mega Man Volnutt
Mega Man Volnutt's Mega Buster differs from most models in that it does not allow for charging; it instead allows for rapid fire, not unlike the Bass Buster or Axl's pistols, only being able to charge in Tatsunoko vs. Capcom. Mega Man's buster is modified by Mega Buster Parts. These modify four abilities: Attack, Energy, Rapid, and Range. Normally, MegaMan is only allowed to use 2 Buster Parts at a time, but upon obtaining the Adapter Plug, he can equip 3.

MegaMan.EXE
Throughout the Mega Man Battle Network series, MegaMan.EXE's Mega Buster goes through many upgrades and modifications.

Mega Man (Star Force)
The Mega Buster in this incarnation is, instead of a traditional buster, Omega-Xis' head. This version charges automatically, with automatic rapid fire added. Its stats and abilities are changed by equipping various Mega Weapons (known in the third game as Wizard Equips). In the third game, as an effect of wearing the Hunter-VG, Mega Man's left hand is now normal, with a design similar to Omega-Xis. The Mega Buster is now more traditional in design as well. This version of the Mega Buster allows Mega Man to lock on and teleport to the enemy to use close range cards, known as "predation".