X Parasites

The X Parasites are the main antagonist in the video game; Metroid Fusion. They are hostile parasites that were Metroid's prey, but after the metroids became near extinct, the X Parasites took over a space station, and caused so much trouble to Samus Aran.

They have the ability to take the form of anything they make contact with. Doing so, the X Parasites created SA-X, B.O.X., Nightmare, and Neo-Ridley, the Omega Metroid and so much more.