There are 12 different special weapons in the game. They are obtained by collecting and assembling parts found in different locations (unlike classic Mega Man and Mega Man X games, where they are obtained whenever the player defeats a boss).
Normal arm (kick)[edit]
The normal arm is the default special weapon, when no actual special weapon is owned. Despite the name, it is a kick.
Special effect weapons[edit]
Vacuum arm[edit]
By far the most useful special weapon! It sucks all refractors, allowing Mega Man to collect even those dropped by far away enemies.
Drill arm[edit]
It allows to break weak walls and access new areas.
Blade arm[edit]
A powerful sword, in the style of Zero.
Shield arm[edit]
Only useful in Easy Mode, where the Mega Buster is more powerful than any special weapon.
Busters[edit]
Powered buster[edit]
Machine buster[edit]
Shining laser[edit]
Maximum attack, but Mega Man cannot move while shooting.
Active buster[edit]
Homing projectiles.
Grenades[edit]
Splash mine[edit]
The first special weapon obtained in the game.