Robot

Robots are mechanical beings that usual inhabits most continua, usually when there's technology involved. They even lived in the Real World.

Depending on their designs and functions, they are the most diverse beings of the multiverse, rivaling humans. Not only that, they also vary in intelligence. They could be mindless drones, average minded sentients, and some can even go beyond genius level. Most of them are usually made of metal but others can be built with artificial materials such as stone or plastic.