The character Bass is known as Forte in Japan. The name follows the Mega Man series’ musical naming scheme: Bass is a type of low-pitched musical range, while Forte is an Italian musical term meaning loud or strong.
Bass was created by Dr. Wily after studying Mega Man, with the goal of building a robot powerful enough to rival him. He first appeared in Mega Man 7 and was designed as a more advanced Robot Master. Bass is ambitious and often rebels against Wily when he believes Wily is obstructing his quest to become the strongest robot.
The name can be confusing because “Bass” is the standard English localization, while “Forte” is the Japanese name. His robotic companion, Treble, is called Gospel in Japan, creating another musical-name difference between versions. Bass also uses the Bass Buster and can merge with Treble to form Treble Boost, giving him flight and greater firepower.
Forte should not be confused with Proto Man, whose Japanese name is Blues. Both names are musical references, but they belong to different characters.