Rolling Shield will do more damaged than your X Buster, but don't bother charging the weapon because getting too close can be very dangerous. The only way to damage Sigma is to jump on his floating hands when they drop to ground level and ride them up to face level and blast his head with either a fully charged, upgraded X Buster or a Rolling Shield.

This will be a long and difficult battle as Sigma doesn't take damage quickly, but you do. Sigma has four attacks, two from his mouth, and two from each hand: he can breathe fire or shoot electric sparks from his mouth in an arc across the ground, and his hands can either shoot lightning or try and stab you. Name note: the name is conjectural and is not named in the credits.

Note that only the moving eyes can be hit with a Hadoken, which only destroys part of the boss (Rangda Bangda can't be beaten in one hit). Chameleon Sting does the most damage and using it charged (making you temporarily transparent) can really make the battle easier. When the walls close in, spikes appear underneath them and you must cling to the walls as Rangda Bangda's nose moves between the two walls trying to collide with you. Depending on the color, the eye will move towards you (blue), fire shots at you (green), or both (red). Throughout the fight, one of the eyes will become active (vulnerable) and pop out of the background. Remember, do not destroy the nose first, or the walls will close and you will have to fight the eyes in an enclosed space. This means you should try and divide the damage you deal between all three colors before destroying them all. The best strategy for this fight is to keep all three eyes alive for as long as possible so that you spend less time away from the nose (since the nose moves in a random direction, and you're in a small area, it's easier to be hit). If two eyes are destroyed, the walls will no longer retract. After a short period, the nose will become inactive and the walls will open once again. Throughout the fight, the walls will close up and the nose will become active. Rangda Bangda is a boss made up of three parts: two eyes and a nose, however there are three different eyes (colors).

Mega man 11 all bosses