Bass Buster

Bass Buster, known as Forte Buster in Japan, is Bass's main weapon. In Mega Man 7 and the arcade games, Mega Man: The Power Battle and Mega Man 2: The Power Fighters, the Bass Buster has the same capabilities as the Mega Buster. It can fire green bullets and charged shots. However, in Mega Man & Bass, the Bass Buster loses its charge ability in favor of a drastically increased rate of fire and the ability to fire in 1 of 7 directions. The Bass Buster retained these changes in Rockman and Forte: Mirai Kara no Chousensha and Mega Man 10. In Mega Man 10, the Bass Buster has the additional ability to disarm the shields of the Shield Attackers and Sniper Joes.

Upgrades
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Stolen Parts
Appearances:
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 * In Mega Man 2: The Power Fighters, after Bass saves Roll in the mission "Rescue Roll!", she will give the stolen new parts to him to enhance his charge shot.
 * Mega Man 2: The Power Fighters
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S. Buster
Appearances:
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 * align="center"|[[File:S.buster.png]] [[File:S.buster2.png]]
 * The Super Buster is an upgrade for the Bass Buster that doubles its power, thereby making it quicker and easier to defeat enemies and bosses.
 * Mega Man & Bass, Rockman and Forte: Mirai Kara no Chousensha.
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H. Buster
Appearances: 
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 * align="center"|[[File:H.buster.png]] [[File:H.buster2.png]]
 * The Hyper Buster is an upgrade for the Bass Buster that makes it possible to shoot through walls.
 * Mega Man & Bass, Rockman and Forte: Mirai Kara no Chousensha.
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Trivia

 * The Charged Shot of the Bass Buster seems to resemble a skull.
 * Since Mega Man & Bass, Bass seems to have forgone his buster's charging capabilities in favor of a rapid-fire shot that he can aim in all directions. It's unknown if he can still charge his buster at all or if he just chooses not to, favoring the rapid-fire.