Ridley (Metroid)
Ridley returns in his Meta form once again in "", where he, along with the Space Pirate legion under his command, are corrupted by Dark Samus. He encounters and battles Samus on Norion, a Galactic Federation-occupied world, and the two fight while free-falling down an air shaft. Ridley is later supercharged with Phazon, becoming "Omega Ridley", and is charged with guarding the Leviathan Seed on the Space Pirate homeworld. He is confronted once again by Samus, and despite being defeated, he survives the fight and is later cured of his corruption after Dark Samus' defeat later on. Between the "Prime" trilogy and "", the Space Pirates reorganize on Zebes and hatch another plan to clone and weaponize the Metroids, while Ridley gradually begins to regenerate from his past injuries, gradually shedding his cybernetics. In the remake of the second game, "", Ridley, in his semi-regenerated form of "Proteus Ridley", attacks Samus on SR388 to steal the last remaining Metroid. Samus and the baby Metroid work together to defeat Ridley.
Characters in the Metroid series
is a recurring game boss and a major antagonist in the series. The Chozo created it as a councilor, and as a means to "accelerate their plan to link the galaxy into one unified society." During the Space Pirate invasion of Zebes, it saw the Space Pirates as a "perfect force capable of restoring true order to the universe," and successfully established itself as one of their leaders. At the same time, Mother Brain attempted to persuade Samus to be an ally in order to "build a new age for the universe" by claiming that because it built the power suit that Samus wears, she is indebted to Mother Brain. Mother Brain is depicted as a very large brain with cybernetic spikes and a single eye; usually contained in a glass tube which Samus must break to attack it. In "Super Metroid", Mother Brain also rises from the floor with a grotesque body after her tank is destroyed. Samus seemingly destroys Mother Brain in the original "Metroid", but again confronts it in "Super Metroid"; in this game, Samus is defeated and almost killed, but the baby Metroid intervenes, and Samus once again defeats Mother Brain. It was revealed in "Metroid Prime 3" that the Galactic Federation had constructed biomechanical supercomputers called Auroras, and that there were plans for a "Future Aurora Complex", which appears to be the Mother Brain depicted in "Super Metroid". In the first cutscene for "Metroid: Other M", the scene of Mother Brain destroying the baby Metroid is reenacted in an FMV cutscene, and one of the antagonists, MB, is an android housing an AI based on Mother Brain.