The Auto Shield Blaster is a Permanent Gameplay Upgrade unlocked after completing Associate Archie.
The Auto Shield Blaster allows the Player to auto-attack a Mega Boss's shield (including The Final Boss' pillars and eyes) using the Photon Blaster, which is required in order for this Upgrader to work. The upgrader will only activate once the Player has clicked on a Mega Boss' shield once and will deactivate if clicked again or hit by an attack that disables the players vacuum.