The CRORQ Unit, invented to control servant-type robots, was once the pinnacle of technological advancement. It was later retrofitted with a false eye screen during the Master era. Invented in late 19XX, it could control seventeen hundred servant robots simultaneously.
i think spark man shouldn't have, like, a human face. it's one of its things they couldn't really fit on the sprite and the idea of it as one giant BLOCK of metal with eyes on it helps add to the idea of "industrially designed robot with armored body" energy it makes for me
you can see it used here too on fire man and ice man. guts man uses it but it's hard to notice from a distance his face and his body oranges are different