Blank Heroes is under construction.
Blank Heroes contains canon Hero Factory information.
These are the skeletons of heroes that are are used as complete drones.
These near-mindless drones were unleashed by Mark Surge after being "infected" by a Brain to stop the approaching Bulk, Breez, Furno and Stormer from entering the Hero Factory. These blanks proved no match for the heroes, but as these were being constantly produced using the assembly tower, Natalie was dispatched to stop Surge. After a short battle, Surge was uninfected and the blanks were deactivated.
These were common drones in the Evila HF future were they were only made when there was a limited supply of quaza.