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Villain Overview

This moment begins a new age of prosperity led by me... This is new progress. With me as the successor, beyond my existence, there is no value in having the existence of the Chozo. We are only discarding what is useless. And now, we are gathering partners brimming with youthful strength. With me directing the Space Pirates, they will be a perfect force capable of restoring true order to the universe. Forget about the Chozo, Samus. With you added to our power, we can build a new age for the universe.
~ Mother Brain revealing her true plans to Samus.
Defective product… Me…?!! A defective product… You dare claim that I am defective…!!
~ Mother Brain.

Mother Brain (in Japanese: マザーブレイン, Mazā Burein) is the overarching antagonist of the Metroid franchise, serving as the main antagonist of the games Metroid and its remake Metroid Zero Mission, Super Metroid, the prequel manga and a posthumous antagonist in other Metroid games. She also appears as the main antagonist in the TV show, Captain N: The Game Master.

She is a cold artificial intelligence created by the Chozo, but turned against them when the Space Pirates and Ridley invaded Zebes. Mother Brain saw potential in the pirates and decided that with their help, she could bring true order to the universe by "resetting everything back to zero".

Biography

Metroid

Mother Brain in Metroid.

In Metroid, Mother Brain is the main antagonist and final boss in the last room of Tourian. She appears as a large brain within a glass stasis tank protected by Zebetite, Rinka, and turrets. The brain itself does not attack in any way after the tank is broken, unlike in the remake Metroid: Zero Mission. The Mother Brain also constantly regenerates life, much like the Zebetites, and the only way to tell how much damage she has taken is by how quickly she pulsates. If left alone, the pulsating will slow, and Mother Brain will heal herself. After Mother Brain has been destroyed, a self-destruct sequence begins, and Samus is forced to evacuate Zebes immediately. The manual for Metroid states that Mother Brain is the leader of the Space Pirates, which would mean Ridley is under her command, but not necessarily under total control.

Metroid: Zero Mission

In Metroid: Zero Mission, Samus' main objectives are to destroy all Metroid organisms on Zebes and defeat the biological super-computer, Mother Brain, as in the original Metroid. The re-rendered version of Mother Brain shares a slight resemblance to Super Metroid's take. She is located in the lowest area of Tourian and is protected by the classic Zebetites, Rinkas, and turrets. There have been some changes not only to Mother Brain's appearance but to her attacks and weaknesses as well. When her stasis tank is damaged and destroyed by Samus with several missiles (in the original NES game, it took but one missile to destroy it), Mother Brain starts countering by gathering energy into her brain and releasing it as a blast from her eye; this eye beam could be considered as a precursor/basis to the Hyper Beam the Mother Brain would have in her resurrected Super Metroid form. Unlike the NES Metroid and Super Metroid appearances, Samus can only wound the boss by firing directly at her eyeball.

Every time Samus hits the weak spot with either five missiles (three on Hard difficulty), one Super Missile, or drops into the lava in the room, Mother Brain closes her eye and resumes the beam attack as soon as Samus gets back up. Surprisingly, Mother Brain does not appear as the final boss of the game. After Mother Brain is defeated, Samus evacuates Tourian, takes flight and is ambushed by Space Pirates. After crash-landing on Zebes, Samus ends up having to board the Space Pirate Mother Ship in her Zero Suit with only an emergency pistol to defend herself.

Mother Brain in Metroid: Zero Mission.

Unlike in Super Metroid, Mother Brain does not use a mechanical body and remains stationary. A revisit to Tourian after acquiring the Fully Powered Suit reveals a hidden chamber underneath Mother Brain's capsule that was also present in Super Metroid. This may indicate that her body was planned but not fully implemented or could have simply been a cache of life support systems connected underneath Mother Brain. The pools of lava have also been replaced by an extremely corrosive green chemical, the only substance in Zero Mission capable of harming Samus even while she is wearing the Gravity Suit.

Metroid Prime 3: Corruption

In Metroid Prime 3: Corruption, it is revealed that the Galactic Federation uses organic supercomputers known as Aurora Units, brain-like neuron masses in tanks that closely resemble Mother Brain. The Mother Brain was built by the Chozo, though the manga indicates that the Federation had some part in this as well as she was built to link the Federation and Chozo information databases, similar to the function of the Auroras. Also, the Metroid Prime 3: Corruption trailer for Aurora Units shows a "future Aurora complex" which bears a near-identical resemblance to the Mother Brain's room in Super Metroid.

Also, the final boss of the game, Aurora Unit 313, features many references to Mother Brain, such as its cannons firing red spheres that look similar to Rinka, the purple laser that bears resemblance to Mother Brain's beam attacks, and the cable that supports 313 that is similar to Mother Brain's neck in Super Metroid. The Aurora Unit 313 theme is an arrangement of Darkness, Dark Samus' theme, arranged in a way that resembles Mother Brain's theme in Zero Mission.

This along with the Federation's seemingly corrupt actions at the end of Metroid Fusion might indicate a deeper and darker meaning with the Aurora Units.

Super Metroid

Mother Brain in Super Metroid.

In Super Metroid, similar to the original Metroid, Mother Brain is the main antagonist and final boss, found in the last room of Tourian. The battle against her remains the same initially. Once Samus defeats her, the actual brain itself falls to the ground and turns pale. After a short wait, she starts to rise up and is seen to be connected to a mechanical body, possibly built by the Space Pirates, indicating that she had learned from her mistakes in her last encounter with Samus.

Mother Brain uses a new weapon known as the Laser Brain Attack against Samus, which not only depletes an enormous amount of Energy Tanks, but also depletes Samus' Missile, Super Missile and Power Bomb ammo. When Mother Brain is about to finish her off, the Baby Metroid that Samus found on SR388 latches itself onto Mother Brain, absorbs her energy, apparently killing her, and restores Samus' health. An injured Mother Brain slowly reactivates and stands back up, and angrily attacks the Metroid as it covers Samus. As the Metroid lets go of her and lunges at Mother Brain once more, she delivers a killing blow, and the remains of the Baby fall over Samus.

Mother Brain's alternate form in Super Metroid.

At that moment, Samus realizes that the Metroid was able to grant her the power of the Hyper Beam, which it stole from the Mother Brain. Enraged, Samus opens fire and defeats Mother Brain with her own beam attack. Afterward, Mother Brain's body is destroyed, causing her head to fall down and become pale. Mother Brain's head then weakly opens its mouth and finally turns to dust. Once Mother Brain dies, a Countdown starts, destined this time to end in the obliteration of the entire planet. Samus evacuates Zebes once again before it explodes with her on it. As of Super Metroid, Mother Brain has been eradicated from the universe, and resurrection is unlikely.

Metroid: Other M

Melissa Bergman aka MB ("Mother Brain").

Main article: MB

Although Mother Brain herself only appears in a flashback at the beginning recapping her role in Super Metroid, her personality relies in the android Melissa Bergman (also known as MB), the main antagonist of Metroid: Other M.

MB perceives all life forms in the Bottle Ship not under her control, including the scientists, as a threat and controls the Desbrachians to attack in order for her to take over. She begins calling herself Madeline Bergman, the name of her former human friend and tries to manipulate Samus into believing that she is an ally. It is unknown if her actions influenced Ridley at all, who had been reborn in a new cloned body. It is possible that she may have been able to direct him upon his body being drained and his still-existing molecules being sucked into the Queen Metroid (which was destroyed by Samus, meaning his molecules would return to his drained body). Regardless, she is destroyed soon after the death of the Queen, being anticlimactically shot down by the Federation soldiers as soon as Samus takes care of the Desbrachians, thus destroying what may have been another Mother Brain. Ridley, however, was to be resurrected yet again in Metroid: Fusion.

It is possible that MB was under the manipulation of Phantoon, who shows up as the true final boss post-credits.

Metroid Prime: Federation Force

The main villain and final boss, Master Brain, also appears as a variation to Mother Brain.

Metroid Manga

Mother Brain's flying monitor system. Mother Brain can monitor Zebes with its camera eye and communicate through it. In the Metroid manga, Mother Brain begins as an ally of the Chozo. The Chozo use her to keep track of data and reports.

When Samus disarms a number of Iona Faria that had been "corrupted" by the Space Pirates but doesn't kill them, Mother Brain orders sentry robots to kill them instead, angering Samus. The manga shows Mother Brain's frustration with the Chozo and with the many raids of the Space Pirates. She also mentions the Metroids as being her and the Chozo's children.

Later on, she takes it upon herself to "dispose" of many of the Chozo, calculating that by taking command of the Space Pirates, she could bring true order to the galaxy. She designated herself, a Chozo named Grey Voice, Ridley, and Samus Aran as Space Pirate commanders, though Samus refused to cooperate.

Mother Brain also stated that she was the one who created Samus' Power Suit.

After it is revealed that Grey Voice has only been pretending to be a Space Pirate commander so that he can get closer to her, he then attacks Mother Brain, claiming that even though he will allow the Pirates to have the planet, he will not allow a "defective" product to continue. However, Grey Voice soon discovers that the Zebetite shield is too strong and that his attacks cannot get through; Mother Brain is then rescued by Ridley, who comes and battles with Grey Voice. As Grey Voice is killed by Ridley's flames, Mother Brain mocks him as a flightless bird.

Later on, it comes to light that Mother Brain is, in fact, using the Pirates to further her own goals and that she is using them to fight the Galactic Federation so that both become weakened. She plans on using an "evolved" form of the Metroid, an intelligent one, so that she may become the ruler of the universe. She seems to refer to all beings, from the Pirates to Ridley to the Federation, as simple beasts.

Captain N: The Game Master

Mother Brain is the main antagonist of the cartoon Captain N: The Game Master. Controlling a converted asteroid called Metroid, she plots to capture the Palace of Power and take over all of Videoland.

Super Smash Bros.

Super Smash Bros. Brawl

Mother Brain appears as a sticker, which increases flinch resistance when equipped by any character.

Super Smash Bros. for Wii U and 3DS

Mother Brain appears as an Assist Trophy and a regular trophy. When summoned, energy rings attack the opponents. While that is going on, Mother Brain grows in size. She then proceeds to shoot a powerful beam out of her eye. She can be defeated by hitting her in the back enough times after the glass of her capsule breaks.

Super Smash Bros. Ultimate

Mother Brain returns as an Assist Trophy, behaving exactly the same as in Super Smash Bros. for Wii U and 3DS. She also appears as a primary shield-type Spirit that can be enhanced at level 99 to her second form from Super Metroid, which allows the player to start each battle giant-sized when equipped. Her Spirit Battle is against Dark Samus, who summons Mother Brain as a hostile Assist Trophy.

Appearance

Mother Brain resembles a human brain, though she is more spherical in shape. She has short metal spikes protruding from the top of her "head" and a single gigantic eyeball with a red iris. Unlike the Federation's Aurora Units, which are neuron masses enclosed in metallic shells, Mother Brain's hide is strong enough that she remains completely exposed. Several power cables come off the bottom of her body, and she appears to be permanently attached to the floor of her tank, unlike the Federations' Aurora Units, which are free-floating. Her tank, called the Control Capsule in the Super Metroid comic, is made of Zebetite and is protected by multiple gun turrets, Rinka, and more Zebetite barriers which serve as both protection and energy resources.

In Super Metroid, she has a number of changes. She is now an orange color and appears to be more mechanized. Her eye is now white and has no pupil (though Metroid: Other M appears to have retconned this and gave her a more detailed eyeball) and she has a metallic mouth, complete with tongue and spittle, from which she can roar. Her most notable addition, of course, is a new mechanized body, which connects to her immediately following forcible disconnection from her capsule's life-support systems. The body itself stands taller than Ridley and is capable of dozens of attacks, including red energy beams, bombs, blue ring lasers, beam shots via her eye, and her most powerful attack, the Laser Brain Attack. This mechanized body strongly resembles a Torizo, suggesting similar technology.

Personality

In the video games, Mother Brain's personality wasn't clear because of her lack of dialogues in the video games. Despite this, some of the instruction manuals and players' guides describe her as the leader behind the heinous Space Pirates that operates in Zebes, being the main responsible of their plans. Furthermore in Super Metroid, she proved to be very cunning, prediciting a similar result like their previous encounter, she tricks Samus into believing the battle has finally ended, only to reactivate herself now fused with a powerful mechanical body, trapping Samus and herself in a room where she couldn't easily avoid her attacks.

In the prequel manga, Mother Brain's personality becomes more apparent. Mother Brain is portrayed as an arrogant, cunning and manipulative A.I that progressively grew to value the life of their creators, the Chozo as useless, while viewing herself as perfect. Although an ally to her creators, she never displayed any emotions towards those the Chozo took care of such as Samus. While meeting Samus for the first time, Mother closely observed her to the point it frightened the young child and the former quickly disregarded her as a weak creature that would die from the harsh environment of Zebes. Furthermore, Mother later took control of the Space Pirates, after she realizes that they are just a submissive tribe of workers. Gray Voice has also realized that Mother is jealous of Samus, as the Chozo have more hopes for Samus than for Mother. Mother also had a very weak and conflicted personality, this is demonstrated after Gray Voice made his move to destroy her while calling her out for her jealousy towards Samus, regarding her as a "defective product".

Despite her allegiance with them, Mother Brain was never interested in the Space Pirates. She only saw them as means to achieve her own goals. She planned to use the Metroid species to be the supreme ruler of the universe. She also believed that she was superior to others, which is perceived when referring to other beings, from the Space Pirates to Ridley as mere beasts. She would mention that the Metroids were her and the Chozo's children, in addition to declaring herself as the creator of the Suit worn by Samus Aran, even criticizing Samus for its misuse, although in the manga she seems to feel some admiration towards her for which she tried to seduce her to join her as commander of the Space Pirates.

Leadership Debate

Mother Brain's role in the Metroid series is vague. There is a debate as to whether she or Ridley is the leader of the Space Pirates (this question growing more confused with the addition of High Command from the Metroid Prime games). Her body appears to be based off Torizo technology. According to the manual for Super Metroid and the manual for Metroid: Zero Mission. and the official manga, Ridley is the general of the Space Pirates while Mother Brain is the biological computer which controls Zebes' defenses.

However, in the manuals for Metroid and Metroid Fusion, the box for Metroid: Zero Mission game box, the Super Metroid Nintendo Power comic, and the intro to Super Metroid in-game introduction refer to Mother Brain as the leader of the Space Pirates, with the manual for Metroid. saying that Ridley is controlled by Mother Brain. The manga later retcons this to rectify any confusion by stating that Mother Brain took over as one of the Pirates' leaders, while keeping Ridley in his former position. Also, her referring to Ridley and the other Space Pirates as "simple beasts" might help explain the previous statement of Mother Brain controlling Ridley.

The Space Pirate Data in Metroid Prime refers to a High Command that commands the Space Pirates, which included ordering Ridley to be reconstructed. Whether or not Ridley is part of High Command is unclear. He may be the Pirate general, answering to High Command and/or Mother Brain.

List of appearances

Videogames

  • Metroid
  • Super Metroid
  • Metroid Prime (manual)
  • Metroid: Zero Mission
  • Metroid Prime 2: Echoes Bonus Disc
  • Super Smash Bros. Brawl
  • New Play Control! Metroid Prime (manual)
  • Metroid: Other M (flashback)
  • Super Smash Bros. for Nintendo 3DS and Wii U
  • Metroid: Samus Returns (cutscene, mentioned)
  • Super Smash Bros. Ultimate

Television

  • Captain N: The Game Master (TV Show)
  • TV Commercial: 60 Spot

Manga, Comics, & Books

  • Metroid (1986 manga)
  • Victory Techniques for Metroid
  • Captain N: The Game Master (comics)
  • Super Metroid (manga)
  • Metroid (2002 manga)
  • Blood of the Chozo (mentioned)
  • Samus and Joey
  • Super Metroid (Nintendo Power comic)

Misc

  • Another Side Story (mentioned)
  • Tetris DS (background in Level 12 in Marathon Mode)
  • NES Remix 2

Quotes

As expected, this weak creature is incapable of living in Zebes' harsh environment. I do not expect her to last more than a few days.
~ Mother Brain upon meeting a young Samus.
You are also one of us. Now open your heart, Samus.
~ Mother Brain trying to convince Samus to join the Space Pirates.
Try to remember... Why you are here. Why did the Chozo who cannot produce offspring, usher you into their family?! You, of the human race, were injected with Chozo genes. Why were you reborn as an extraordinary hybrid? Everything was done in order to convert you into a bio-weapon. The results were satisfactory. You grew to become a spectacular weapon. As your parent, I am proud.
~ Mother Brain to Samus.
My, my. What's wrong? This shield is made by molecule transference of Zebetite. It uses the same system that governs the planet's shield. You should know your weapon is useless here. What are you so worked up about?
~ Mother Brain mocking Samus.
What's wrong, Gray? Did you just realize that you are yourself nothing but a beast as well? No, more accurately... that you're just a bird that can't even fly!
~ Mother Brain mocking Gray Voice
That's right, you all need to fight. A dance among beasts, clawing and ripping into each other. And after the battle, I will cradle both injured Federation members and Space Pirates to sleep. When they wake, they will wake as true intellectual beings!! Yes! And with that, I will finally become the ruler of the universe!
~ Mother Brain's plan
Samus, give up... No matter how hard you struggle, you won't be rewarded. The galaxy has been set into an endless loop of destruction, repression and murder. You're just foolishly repeating history! Somebody has to reset everything to zero! Give up on your futile hopes!!
~ Mother Brain as Samus struggles battling Kraid

Video Game and Tv Show Descriptions

Mother Brain lies in the central base of the fortress planet Zebes, the home of the space pirates. Its aim is to cultivate Metroid to multiply and conquer space. Zeebetite is its energy source. You have to discover Mother Brain's weak point before you can launch a missile attack. When hit, it makes a shrieking noise.
~ Metroid
The perpetrator of all the trouble. Mother Brain is at the very core of Zebes, controlling all the operations on and around the planet. It will take every ounce of strength, courage and determination to make it past this heinous enemy
~ Super Metroid
Mother Brain was not originally dangerous, and was an indispensable artificial intelligence that served as the center of the advanced Chozo civilization. However, as an extremely superior standalone AI, Mother Brain sprouted dangerous thoughts and went berserk.
~ Yoshio Sakamoto in the Zero Mission Website
Mother Brain is part grotesquely enlarged human brain, part souped-up bionic support system, and all evil. Every electrical device on Metroid, from the robot workers in the airlocks to the TV monitors and toasters, has been wired to do her bidding. In her high-tech nest at the center of the planet, Mother Brain spins her schemes and directs the Forces of Chaos' grand conspiracy.
~ Captain N: The Game Master

Super Smash Bros.

Mother Brain from the Metroid series is an enormous Assist Trophy that fires vertically tracking laser rays. Fighters caught in the rays will rack up numerous hits and damage, so it's better not to be in front of her. By the way, it's possible to defeat Mother Brain by attacking her.
~ SSB4 Website
Hailing from the Metroid series, this evil boss resides on the planet Zebes. When she appears in Smash Bros., she attacks with energy projectiles and a beam from her eye. It's actually possible to defeat her, and for once doing so won't start a self-destruct sequence.
~ 3DS Trophy description (NTSC)
A mainstay of the Metroid series and the final boss Samus faces on Planet Zebes. In this game, she grows to a gargantuan size and fires all sorts of energy blasts at you. Good news: you can beat her! Better news: doing so won't trigger a self-destruct sequence forcing you to make your escape!
~ 3DS Trophy description (PAL)
  • Mother Brain: Attack Mother Brain to defeat her! The glass around her will shatter after she fires lasers—that's your chance to strike!
  • Mother Brain's Rinkas: Mother Brain will fire ring-shaped projectiles called Rinkas from off-screen. These are energy based, so they can be absorbed or reflected.
  • Mother Brain's Lasers: Mother Brain will send colorful lasers shooting up and down the screen. They can't be absorbed or reflected, so you'll have to just avoid them!
  • Mother Brain as a Shield: It's totally fine to use Mother Brain to shield yourself from the attacks of your rivals.
~ SSB4 and SSBU Tips


Trivia

  • Mother Brain is one of the very few enemies in the series that managed to overpower Samus in battle. The others being in Ridley at the very beginning of Super Metroid, Omega Metroid in Metroid: Fusion and Dark Samus in Metroid Prime 3: Corruption.
  • Since the Metroid series was inspired by the Alien franchise, Mother Brain's name may have derived from "Mother", the name of the computer on the Nostromo.
  • In Captain N: The Game Master, Mother Brain was voiced by the late Levi Stubbs of The Four Tops, who was best known for voicing Audrey II in Little Shop of Horrors.
  • Mother Brain, along with her appearance in the prequel manga, is a lot similar to 343 Guilty Spark, an artificial intelligence from the Halo franchise.
  • Mother Brain is mentioned in Super Mario RPG: Legend of the Seven Stars. If Mario returns to Princess Peach castle, he will find Samus there, sleeping on the bed in the guest room. If talked to, she will say that she is resting here, waiting for Mother Brain.
  • In WarioWare, Inc.: Mega MicroGame$! and WarioWare, Inc.: Mega PartyGame$!, Mother Brain appears in a microgame called "Metroid" that recreates the battle between her and Samus of the first Metroid. It retained the siren system from the Famicom version, although being slightly different from the original battle.

Navigation

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Ing
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The Deleter

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