Shield Attacker (シールドアタッカー,Shīrudo Atakkā?) is a recurring flying enemy that is indestructible in front. It can only be damaged attacking his back or attacking him with some of the special weapons. They first made an appearance in Mega Man 4. In Mega Man 7, they flip their shield face rather than turning around. In Mega Man 8, they are modeled after the Oni Mask boss from Mega Man 7, HannyaNED².
Shield Attacker from Mega Man 4 and Mega Man III. It appears in Dust Man and Skull Man's stages in Mega Man 4 and Mega Man III, the fourth stage from Dr. Cossack's Citadel and the third Wily Castle stage in Mega Man 4, and in Drill Man's stage and the Wily Station in Mega Man III. Through it is weak to Drill Bomb, Ring Boomerang is also a good choice against it, as it can pass its armor. Rain Flush destroys Shield Attackers instantly, although it uses a lot of energy, so it's best to use in areas with large amounts of enemies, such as the extra section containing the E-Tank in Skull Man's stage. Flash Stopper negates the shields of the Shield Attacker, but like Rain Flush it uses a large amount of energy so it is best to use it when incoming Shield Attackers cannot be avoided.
Hits Data Chart
Amount of shots/hits from Special Weapons it takes to destroy a Shield Attacker.
Shield Guard, known as Shield Attacker in Japan, is a version from Mega Man: Powered Up that has a propeller instead of jet engine, making them slower. Their shields can be knocked out by some attacks. They appear in Time Man's stage and Ice Man's stage.
New Shield Attacker (新シールドアタッカー,Shin Shīrudo Atakkā?) is the Shield Attacker with an improved armor that appears in Mega Man 5. It only appears in Crystal Man's stage. They are immune to Gravity Hold. As the area in which they appear in has a high ceiling, they can be avoided by sliding or jumping over them and waiting for them to fly off the screen.
Hits Data Chart
Amount of shots/hits from Special Weapons it takes to destroy a New Shield Attacker.
Yamato Spear and the fully-charged Rush Power Adaptor ignores the shields of the Shield Attacker GTR, while Knight Crush and Silver Tomahawk fired at the correct angle will also hit the Shield Attacker GTR from below and therefore ignores the shield. A similar strategy can be applied to Flame Blast - if a wall of fire is raised directly in front of a Shield Attacker GTR, once they run over the flame pillar they will take damage - the Plant Barrier's energy petals can also slip beneat the shield and do damage in the same manner. Shield Attacker GTRs are immune to Beat.
Hits Data Chart
Amount of shots/hits from Special Weapons it takes to destroy a Shield Attacker GTR.
True Shield Attacker (真・シールドアタッカー) is another upgrade of the Shield Attacker in Mega Man 7. It now turns its shield instead of turning around. It appears in Freeze Man's stage, Shade Man's stage, and Wily Castle.
A True Shield Attacker assists the Wily Machine in the "Search for Wily" story from Mega Man 2: The Power Fighters. It moves back and forth and can attack by increasing the fire from its engine or shot bullets from them.
Hannya Attacker is a Shield Attacker with an oni mask similar to HannyaNED². In Mega Man 8, the player will find it in Tengu Man's stage as well as the second stage in Dr. Wily's castle. In Mega Man & Bass, it appears in the stages of Tengu Man, Burner Man and Ground Man, as well as King Stage 1.
Shield Attacker TRL (シールドアタッカー・ＴＲＬ,Shīrudo Atakkā TRL?) is a variety from Mega Man 10 that moves back and forth like previous Shield Attackers. Like the Shield Attacker from Mega Man: Powered Up, its shield can be taken down if hit by strong attacks, but this time with the Bass Buster and Water Shield.
Shield Attacker has a single appearance in the Rockman 4 manga, Shield Attacker GTR appeared a few times in the Rockman 6 manga, True Shield Attacker is in the Rockman 7 manga, and Hannya Attacker in the Rockman 8 manga.