Appearance. The SA-X is an exact copy of Samus Aran, or at least her suit. It's unknown what the SA-X really looks like underneath the armor, but it does have a rather creepy, expressionless, zombie-looking face with missing eye pupils. Its gender is also a mystery.

^ Adam: You know that the X reproduce by asexual division. Because of this mechanism, there are now no fewer than 10 SA-X aboard the station. Nintendo R&D1. Metroid Fusion.

"X seem to have originated on SR388, which is also home to their sole predator, the Metroids. Since Samus Aran exterminated the Metroids on SR388, the X have overrun and infected most of the life-forms on the planet." "X infected other creatures and grow in the nervous systems of these host organisms.

Stick to the low ground and fire charged beam shots directly at the SA-X to destroy it. Your beam must be fully charged to damage it. As it approaches, Space Jump over the SA-X to the other side of the floor while charging your beam, and release the shot when you land.