Mega Buster: The primary weapon that is commonly used by Mega Man himself. The Mega Buster will shoot out compressed solar energy shots that are capable of dealing damage to the number of foes he has fought against. Furthermore, he can perform a charged shot which deals up to three times the normal amount of damage to a single foe. Most importantly, he can also use a number of modifications that allow his compressed solar shots, which includes his charged solar shots, to fire differently.
Arrow Shot: This modification allows Mega Man to shoot an arrow that will split itself upon hitting its target.
Auto Shot: While Mega Man can use this modification to fire off compressed solar shots like firing off an automatic machine gun, it prevents him from charging his shots.
Double Mega Buster: The moment Mega Man charges up enough solar energy to perform a double charged blast that is capable of destroying Ra Moon. It should be pointed out that he will only use this as a last ditch resort against his opponent.
Hyper Shot: This modification allows Mega Man's compressed solar shots to move at a far faster speed, making it difficult for his opponents to evade them.
Hyper Charged Shot: As mentioned above with Hyper Shot, expect this applies to the charged solar shots.
Laser Shot: This modification allows Mega Man to fire off a laser composed of compressed solar energy
Power Shot: This further improves Mega Man's overall attack potency, which allows him to deal even more damage with everything he fires from his Mega Buster.
Shooting Parts: This modification allows Mega Man to fire off up to five compressed solar charged shots all at once.
Turbo Accelerator: This modification allows Mega Man to charge up a charged solar shot much more quickly then before.
Proto Shield: On two occasions, Proto Man will allow Mega Man to use his shield in order to deflect various incoming projectiles and even reduces damage dealt to Mega Man while using it.
Energy Tanks: Mega Man can carry up to nine of these tanks as one will completely refill his health.
Mystery Tank: Like the Super Tank, this also refills all of Mega Man's health and replenishes his special weapons at will. Furthermore, if lesser enemies are near by, it will also turn them into one-ups, if none are near by, it will grant Mega Man an additional life. Mega Man can also carry only one Mystery Tank.
Super Tank: As true to its name, the Super Tank will simply make Mega Man feel super to the point where it will utterly refill his health and replenish his special weapons, he only carries one in his possession.
Weapon Tanks: Like the Energy Tanks, Mega Man can also carry up to nine Weapon Tanks as one will completely refill his special weapons.
Blade Weapons such as Shadow and Metal Blades
Laser Weapons such as the Gemini Laser and Elec Beam
Can Create Black Holes
Can freeze or slow down time
A large amount of bombs and explosives
Somehow knows how to use the Shoryuken
Strength augmenting weapons
Shields that protect him with materials such as diamonds and flame
Dimensional Warping via Centaur Flash
Countless ice/water, wind, earth, lightning, and fire-elemental weapons
Able to fist people to death
Astro Crush summons asteroids
Summoning giant brick blocks to crush anything from above
Strong enough to lift and held up the collapsing Wily Castle 5 without use of the Super Arm (Mega Man 5), and jump/move normally in Jupiter's gravity (25G, Mega Man V). (Strength Feat)
Can keep up with and defeat ridiculously-fast opponents like Quick Man (FTL), Duo (MFTL), Turbo Man, Nitro Man and Fuse Man, along with various Time Stoppers and Teleporters such as Centaur Man, Flash Man and Bright Man (Speed Feat)
Survived the Temple of the Moon exploding and collapsing on top of him with no damage as seen in Super Adventure Rockman, as well as atmospheric re-entry as seen in Mega Man V for the Game Boy (Durability)
Capable of tanking meteor showers and temperatures as hot as the Sun's Surface (Durability)