Okay, so now for some backstory to this idea. Instead of a world where sentient, free-willed robots are invented, I imagined a sort of thing where Nanotechnology boomed, and peoples lives were improved by it immensely.

Of course, this lead to a certain ass (Wily) who would undo all the good this discovery would do. This rouge scientist created a strain of nano-bots that would break down the molecular bonds between cells, reducing people to goo (Biomass) and body parts - which the nano machines would then reconfigure into specific forms. With the introduction of central programming units, these forms would then arise and wreck havoc on the world around them.

The ‘Yellow Devil’ or Blood Devil, as I’ll now be referring to him, would be a construct created of mass amounts of biological material, controlled by a set of AI units that would act in unison to move it around. Without the biomass around them, the AI units would be able to move around and summon the biomass to them, recreating the attacks of the Yellow Devil from the original Megaman game.

Due to the thicker and viscous nature of Biomass, the Blood Devil would also be prone to picking up spare bits of the world around it; in this case some wrecked metal.