dark_matter_(kirby)

A recurring boss and villain in the Kirby (series) series who posesses others, most notably King Dedede. The species plays a major role in the stories of Kirby's Dream Land 2, Kirby's Dream Land 3, and Kirby 64, where they attempt to invade planets and cover them in darkness, and their legacy is felt in most Kirby games since then, both direct and implied.