Today's theme is the favorite man-made pokemon.
This is Voltorb. Voltorb is designed to fool people who think it's a poke-ball, the device used to catch pokemon. Apparently, they were created in the same factory that first manufactured the pokeballs. Some sort of by-product of the process must have mutated them into actual sentient poke-balls.
The more I think about this, the more acts of science gone horribly wrong in the pokemon world are exposed.