Yes. His name was Gerald Robotnik. [Cloud doesn't press but Shadow does start to explain. Many from his world already know this and it isn't anything he's ashamed of.]

That was his intention. To make the Ultimate Lifeform. Part of my purpose is for my DNA to be used to cure diseases. I am also meant to always be there and to be a protector of the world. To be its shadow.

[Which explains his name.] But like most plans, even the best plans, they can go astray.