|Mega Man with the Mega Buster equipped.|
The Mega Buster can shoot up to three small projectiles straight forward at a time. Starting with Mega Man 4, Mega Man gets the ability to charge the buster either partially or fully, with the appearance of charged shots varying depending on the game.
Being Mega Man's default weapon, it has appeared in every MaGMML game to date (except Make a Good Mega Man Level: Episode Zero, where Mega Man isn't playable). By default, a charged shot has its appearance from Mega Man 6; however, in Make a Good Mega Man Level, its remake, and Make a Good Mega Man Level 2, Mega Man can purchase the Charged Buster Upgrade from Eddie's Shop, which gives the charged shot its appearance from Mega Man 5. Also appearing in MaGMML1R, MaGMML2, and Make a Good 48 Hour Mega Man Level is the Uncharged Buster Upgrade (called the Shot Limit Upgrade in the latter), which increases the onscreen limit of uncharged shots from three to fifteen.
By default, uncharged and semi-charged shots deal one point of damage to everything, while a Charge Shot does three (four if the Charged Buster Upgrade is purchased). In MaGMML2, however, semi-charged shots do two points of damage.