The Metal Alien is a boss from Super Contra and Contra III: The Alien Wars. It appears as a winged humanoid alien very reminiscent of the Xenomorphs from the Alien series, who serves as the last challenge before the heroes can be granted an audience with the mastermind Gava.
In it's first appearance, the Metal Alien would stay out of reach while spitting homing shots, eventually sweeping after the player and attacking with it's tongue. On the rematch in the third game, the Metal Alien is fought while climbing a wall, giving little room for the player to maneuver. This time it attacks mainly by using it's prehensile tail to stab the heroes. After taking some damage, it will begin teleporting, making it harder to hit him.