Proto Shield
From MMKB
Proto Shield, known as Blues Shield (ブルースシールド?) in Japan, is Proto Man's shield.
In Mega Man 7, if certain conditions are met, Mega Man can battle Proto Man and, if he wins, he can actually obtain the shield. This shield can actually block some shots (but only if Mega Man is still and is not shooting at the time).
In Super Adventure Rockman, Proto Man will drop his shield to save Mega Man from Sniper Joes in episode 2. Mega Man can use his shield if the player find it by following the flashing arrows that appear in the sides of the screen, first finding a data card with enemy information, and them the shield. When equipped, it reduces the damage Mega Man takes.
In Mega Man 9, the Proto Shield could be used to reflect enemy attacks, but only while Proto Man is jumping.
