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Metroids are one of the major elements and creatures in the Metroid series of games. They are some of the more feared species in the series, as they often appear in dark stages and attach themselves onto your face to suck out your energy. The Metroids can take multiple forms depending on their environment but the most well-known remains the Metroid Larva, which is the image that is the most often associated with the word Metroid.
History[]
The species were created by the Chozo, and named them Metroid apparently because the name means "ultimate warrior" in their language.
They created them so that they could be protected from the X Parasite by sucking out their victim's life energy. This allows them to kill the parasites without dying themselves.
However, their project went awry when the Metroids started to become more vicious and started to attack the Chozo forcing them to leave the planet. Even though it was supposed that the Chozo were killed by the Metroid, the remake of Metroid II: Return of Samus, Metroid: Samus Returns reveal that the Chozo who created the Metroid were betrayed by some of their own and were killed by an unknow masked Chozo warrior armed with a Power Beam canon.
Once a Metroid is born, it considers the first being it sees to be its mother, much like most real life animals do. This can be seen in Metroid II: Return of Samus and Super Metroid, where a newly hatched baby Metroid looks to Samus Aran, the protagonist of the series, as its mother, as normally a newborn would attack her or any other living being. It can thus be concluded that they have a form of intelligence seeing that they have a thought process.
In time, a Metroid will start to morph (the life cycle of a Metroid can be seen to the left) into larger and more powerful creatures. All of the species to the left have been seen as enemies in the Metroid series.
Metroid/Zero Mission[]
In Metroid and Metroid: Zero Mission, it is revealed that the Metroid were discovered by the Galactic Federation who managed to capture some Larvae from SR388's surface despite suffering some heavy casualties. The Metroid specimens were soon stolen by the Space Pirates who discovered that the creature would multiply when exposed to beta radiations. With the Metroid by their side, the Space Pirate gained the upper hand in their fight against the Galactic Federation who was unable to get rid of the creatures. Samus Aran was then tasked with singlehandedly infiltrating the Space Pirate base Tourian on Zebes and destroy the Metroid found there as well as Mother Brain, a Chozo A.I. who allied herself with the Space Pirates and became their commander.
Metroid Prime[]
Not all Metroid larvae were destroyed during the events of Metroid and some were transported to Tallon IV by the fleeing Frigate Orpheon. The Metroid Larvae, being very sensible to their environment, began to mutate into a new breed referred to as "Tallon Metroid", which appears to be smaller and seemingly never grow into the next phase of their life. These Metroid have a very unstable genome however and can mutate greatly if exposed to Phazon and have a very high chance of surviving said exposure with new, useful mutations. After discovering this, the Metroid became one of the favorite test subject of the Space Pirate who were responsible for the creation of many new species of Metroids during the events of Metroid Prime. Two of the main ones found on Tallon IV being the Hunter Metroid and the Fission Metroid. A highly mutated Metroid known as Metroid Prime also serves as the main antagonist of the game. According to in game lore, Metroid Prime was already a threat when the Chozos were still on Tallon IV and is one of the reason the Impact Crater was sealed. Samus eventually defeats Metroid Prime, who manage to steal her Phazon Suit and DNA to, as revealed in the next game, be reborn as some sort of Human-Metroid hybrid known as Dark Samus.
Metroid Prime 2: Echoes[]
In Metroid Prime 2: Echoes, the Space Pirates imported Metroid Larvaes from Tallon IV to planet Aether. The planet's environment and stimuli seemingly caused the creatures' membranes to gain a red coloration while retaining all of the particularities of the Tallon IV breed. The Metroid were brought to Aether by the Space Pirates in hope of continuing their genetic experiments on them.
Many of these Metroid Larvae were inevitably possessed by the Ing and became Dark Tallon Metroid through symbiosis, a breed able to survive to the rash environment of Dark Aether. The Space Pirate base in Agon Wastes contains a room filled with artificially-created Tallon Metroid Cocoons, which give them an infinite supplies of Tallon Metroid to experiment on, it is also worth mentioning that these Tallon Metroids quickly become Aetherian Metroids when they are exposed to Phazon. Dark Samus also serves as one of the main antagonists of the game as well as the final boss.
Metroid Prime 3: Corruption[]
Metroid Prime 3: Corruption revolves mainly around Dark Samus and her plan to corrupt the universe with her Phazon infused Leviathan Seeds. Aside from Dark Samus, four additional mutant strains of Metroid are introduced. All are once again variants of the Tallon Metroids, as they are very sensible to Phazon.
This time, the Space Pirates are under the direct influence of Dark Samus, who took over the Pirate Homeworld and started to request progressing further on their genetic experiments. The four breeds are the Phazon Metroid, the Miniroid, the Hopping Metroid and the Metroid Hatcher. Dark Samus herself is seemingly killed at the end of the game and every single Phazon infused creatures seems to die as well, killing all of the mutated Tallon Metroid breeds.
Metroid Prime: Federation Force[]
The Space Pirates maintained a supply of Metroid eggs and Larvae, multiplying the latter in a former medical laboratory on Talvania. All of the Metroids present, including the Pirates themselves, were enlarged with the Amplification beam. The Galactic Federation caught wind of this operation and tasked the Federation Force with destroying the facility via a self-destruct mechanism inside. The force was also tasked with retrieving Metroid eggs by General Alex Miles. At the end of the game, an unknown individual with an armor similar to the one usually worn by Sylux infiltrates a Galactic Federation laboratory, and causes a Metroid Egg in captivity to hatch.
Metroid II: Return of Samus/Metroid Samus Returns[]
In Metroid II: Return of Samus and Metroid: Samus Returns, seeing the dangers the Metroids posed to the galaxy in the past, the Galactic Federation sent the Special Squadron to SR388 to wipe out the hostile lifeforms. After two failed attempts by the Federation's army to eradicate the Metroids on their home planet, they called on Samus Aran to deal with them as she was the only person able to survive several encounters with the creatures.
Since the SR388 Metroids are the original ones, they go through their natural growth cycle and eventually becomes the feared Omega Metroid who are pretty much the apex predator of SR388. Samus manage to kill every single Metroid on the planet and their queen and decide to bring the last infant Metroid with her to have it in captivity. She is stopped by Ridley, who is starting to regenerate out of his cyborg form he had in the Prime games due to his defeat iin the original Metroid, but with the help of The Baby, she is able to defeat him and he is left for dead on SR388. Ridley finish his regeneration and leaves his cybernetic parts on the planet before leaving for the Ceres Station where Samus left The Baby. Since the Metroids are gone, the X Parasite start to take over SR388 and reclaim their place as the original apex predator of the planet.
Super Metroid[]
In Super Metroid, The Baby is at Ceres Station where it is studied by human scientist but mere minutes after Samus leaves the station, Ridley arrives with the Space Pirates forces and take steal The Baby to take it to their rebuilt base on Zebes. The Space Pirates uses their usual beta radiation method to multiply The Baby. They also try to clone the multiplied Metroid Larvae, which result in the failure known as Mochtroid. Samus eventually finds out that The Baby was mutated into a giant Metroid, The Baby sacrifice itself to help Samus take down Mother Brain.
Metroid Other M[]
After Samus Aran completed her second mission on Zebes, she spends a great deal of time in thought, reliving the death of the Baby at the hands of Mother Brain. Adrift in space and in memories, she receives a message codenamed "Baby's Cry", reminding her of her lost "child". Following the signal, Samus arrives at the BOTTLE SHIP.
In the Cryosphere, Samus finds a deceased Gigafraug showing signs of Metroid predation. Samus has doubts since not only would Metroids perish in the Cryosphere's cold temperatures, they were extinct thanks to the efforts of both the Space Pirates and herself.
Soon afterward, MB, posing as Madeline Bergman, tells Samus about "Project Metroid Warriors", in which Metroids were cloned from the Baby's particles that landed on Samus's Power Suit and are located in Sector Zero. She also explains that they made an AI of Mother Brain's intelligence to control them.
Samus heads to Sector Zero but stops short as an Infant Metroid pops up in front of her, reminding her of the Baby. When Samus decides to kill the Metroid, Adam Malkovich shoots her in the back; the Infant sees her as food, but is also shot.
Adam explains that the cloned Metroids that have reached the mature larval stage are likely to have been re-engineered to remove their vulnerability to cold, making them virtually unstoppable; this also confirms that the dead Gigafraug Samus found earlier was indeed the subject of Metroid predation. He also states that the breeding project was named after him, though he was not actually involved in the project. He was petitioned for the authority to create the project, but he refused. However, scientists co-signed it to get the project running.
Adam shot Samus earlier to prevent her from interfering with his next course of action: because the Metroids are immune to Samus' weaponry, Adam goes to activate a self-destruct protocol on Sector Zero by causing severe damage from within, which detaches the sector from the station before the explosion. Seeing this as a suicide mission, Samus attempts to convince him to let her destroy the Metroids, but Adam ignores her, saying that she has work left on the BOTTLE SHIP. Adam succeeds in his mission to destroy the Metroids at the cost of his own life.
However, a Queen Metroid was kept in another part of the BOTTLE SHIP. It not only attacks Samus, but launches several other Metroids. Ultimately, Samus is forced to resort to an old tactic and uses a Power Bomb in the belly of the beast. it is currently unknown how MB succeeded in making an Infant Metroid reach the Queen stage outside of SR388's environment.
Metroid Fusion[]
While the Metroid were gone from SR388, the ecosystem went out of balance and the X parasite regained their place as the apex predator. Samus was hired to protect some Federation scientists who were studying the recovery of the SR388 ecosystem. While they were on the planet, Samus was infected with an X Parasite. She was rushed back to Federation Headquarters with a minimal chance of survival. It had recently been discovered that the Metroids were the sole predators of the X Parasites, without the former to keep them in check, the X are rapidly reproducing and infecting all forms of life on the planet, taking their hosts' DNA in order to mimic them before moving on to their next host. Using this information, the Federation saved Samus by injecting her with a Metroid vaccine made from a DNA sample of The Baby.
Now with Metroid DNA, Samus is immune against the X Parasite and is able to absorb them in their pure form just by making contact with them. This caused her to inherit the Metroids' weakness to cold however. Samus quickly realized that if the X Parasite managed to gain access to a single host with the ability to pilot a ship, they would be able to decimate the galaxy.
During her mission, she discovered that the Galactic Federation tried to breed Metroids once again but before she could do anything about it, the program was destroyed by a powerful X Parasite mimicking Samus known as the SA-X. The whole laboratory was ejected into space killing all of the Metroids except for one infant that managed to escape and grow to the Omega stage of its life before being killed by Samus. After that, the only remaining sample of Metroid DNA known is inside Samus herself.
Metroid Dread[]
In Metroid Dread, Samus is the only individual in the universe who possesses Metroid DNA, making her the last living remnant of their kind.
Types of Metroids[]
Natural Types of Metroid[]
Type | Information |
Metroid Larva | The first form of a regular Metroid. They are what the word "Metroid" is usually used to refer to. They are floating jellyfish-like creatures with four fangs and the ability to grasp onto and steal the life energy of its opponents. |
Alpha Metroid | The second form of a regular Metroid. The top, bluish glowing part of a regular Metroid seemed to have gone down to its underside. Also spawned legs, which allow it to walk around. Once a Metroid turns into an Alpha Metroid, it loses its ability to grasp onto its opponents. |
Gamma Metroid | The third form of a regular Metroid, and the form that an Alpha Metroid turns into. While not vastly different from the Alpha version, it is larger and more vicious, also has bigger horns, and can shoot electricity. |
Zeta Metroid | The fourth form of a regular Metroid and the form that a Gamma Metroid will turn into. It's about the size of a human, though a little taller. Arguably it could be considered the biggest change in all the forms that a Metroid goes through. |
Omega Metroid | The fifth form of a regular Metroid, and the form that a Zeta Metroid turns into. Much larger than a human, and in appearance looks like a dinosaur. When a Zeta Metroid turns into this form, it is not only more powerful, but it also gains the ability to shoot fire balls from its mouth. |
Unatural Metroid Types[]
Type | Information |
Dark Tallon Metroid | A Type of Tallon Metroid that is basically just a regular Metroid possessed by an Ing to survive in the rash environment of Dark Aether |
Fission Metroid | An highly mutated Tallon Metroid that gained the ability to naturally split into two other Fission Metroids at will due to their exposition to Phazon. |
Hopping Metroid | A type of Metroid that evolved to move on the ground by small hops after being exposed to Phazon. They are way smaller than the ground versions of the regular Metroid. |
Hunter Metroid | Hunter Metroids are Tallon Metroids that grew up in a Phazon heavy environment, instead of becoming Alpha Metroids, they turned into these floating Metroids with the ability to drain life force from a confortable distance. |
Miniroid | These Metroids are actually one of the few breeds that developed a complete life cycle after being exposed to Phazon and thus becoming a new species. The Miniroid are harmless and relly on the protection of their elder, the Phazon Metroid to survive. They are the equivalent of the Metroid Larvae. |
Phazon Metroid | These Metroids are the second phase in a Miniroid's life, they are agressive and act as protector to the smaller Miniroids. They are the equivalent of all the stages in a regular Metroid's life beyond the initial one. |
Metroid Hatcher | These Metroids are the third phase in a Miniroid's life, they are matrix that produce Miniroids. They are the equivalent of the Queen stage in a regular Metroid's life. |
Mochtroid | Failed clones of the regular Metroids that are weaker in every way, it is unknown if they are even able to advance further on their intended life cycle. |
Unique Specimens[]
Queen Metroid[]
In all, only two Queen Metroids have been found (in the Game Boy video game Metroid II: The Return of Samus (and its remake, Samus Returns) and in Metroid: Other M). It seems to be the largest of the Metroid species found in the life cycle above, and currently it is unknown what makes a Metroid turn into a Queen Metroid. The Queen Metroid found in Metroid II is a very strong creature that is capable of tearing its opponents apart easily using its long, expandable neck to grasp onto far away prey.
Metroid Prime/Dark Samus[]
Metroid Prime is the main antagonist and final boss of Metroid Prime. Apparently, according to the official website at least (which could arguably be considered canon), Metroid Prime also came from SR388. It was also revealed via the Chozo lore that can be found in the series that Metroid Prime is one of the major reasons why their species started to become extinct.
It should be noted that if we are to believe this, Prime arrived on Tallon IV long before the events that took place in Metroid Prime, which would mean that at least one Metroid was on Tallon IV before the arrival of the Space Pirates. After being defeated at the hands of Samus Aran, the creature was able to steal Samus's Phazon Suit and use it to regenerate itself and turn into the being known as Dark Samus, who would permanently die in Metroid Prime 3: Corruption. Metroid Prime is the most advanced, intelligent, and dangerous Metroid featured in the entire series so far and one of the few Metroid characters that is considered the main antagonist of three separate games.
Super Smash Bros. series[]
In Super Smash Bros. Brawl, the Metroid Larva is an Assist Trophy. The form it most resembles is the Zeta Metroid. When summoned, it floats around and targets a nearby opponent and attacks to them with very light damage and stuns them repeatedly restricting their movement. Eventually, the Metroid comes off and sometimes attacks another opponent. If not, it will just disappear. In the trophy, the reflection of Super Metroid can be seen on it. In Super Smash Bros. for Nintendo 3DS/Wii U and Super Smash Bros. Ultimate, it returns as an assist trophy. Dark Samus, who is technically a type of Metroid is also a playable character in Ultimate. The Metroids appear as regular trophies and Spirits in all the games since Super Smash Bros. Melee.
Trophy Descriptions[]
Super Smash Bros. Melee[]
- A parasitic life form that can absorb all types of energy, Metroids have strong resistance to most conventional weaponry. To defeat them, Samus Aran had to freeze them with Ice Beam shots and then blast them with missiles. Mochtroids, which look like Metroids, are weaker, with fewer internal nuclei.
Super Smash Bros. Brawl[]
Metroid Larva[]
- A bioengineered life-form found on planet SR388. Metroids attach to organisms and drain life energy. The Galactic Federation commissions Samus to eliminate them, but Space Pirates try to harness their power. One of the few ways Samus can kill Metroids is by shooting them with the Ice Beam and then shattering them with missiles. The Metroid's cry is chilling and indescribable.
Metroid Prime (Core)[]
- The core form of Metroid Prime after losing its exoskeleton. It can make itself invisible for a set time, which requires Samus to make a visor change. Normal hits do not have any effect on it—the Metroid Prime can eventually be defeated by using the Phazon Beam while standing in a Phazon puddle.
Metroid Prime (Exoskeleton)[]
- The form of the Metroid Prime that Samus first encounters. It can become invulnerable to all but one of Samus's weapons at a time. The body color alternates between yellow, purple, white, and red, with color indicating the weapon that can deal damage. After taking a certain amount of damage, the Metroid Prime exoskeleton reveals its core essence.
Dark Samus[]
- A twin image of Samus, encountered near the beginning of Metroid Prime 2: Echoes. Dark Samus is identical to Samus in every way but color—she even uses similar attacks. There are many theories on the origin of Dark Samus, but none are proven. Dark Samus uses Phazon for energy and can absorb it to heal damage. Samus encounters Dark Samus a number of times.
Super Smash Bros. for Nintendo 3DS/Wii U[]
Metroid Larva[]
- EU: Mysterious floating life-forms, discovered on the planet SR388, that absorb energy from other living beings. They're tough, except when they're cold. In this game, they'll try to attach themselves to fighters' heads and drain their energy. Press all the buttons you can to shake them off!
- NA: First discovered on planet SR388, this floating life-form grows by absorbing energy around it. It is incredibly durable but extremely weak to cold. In Smash Bros., a Metroid will grab a rival by the head and drain energy. If you get grabbed, shake it off by pressing left and right!
Dark Samus[]
- NA: This terrifying creature is made of Phazon. Along with regenerative abilities, she can also brainwash her victims and clone herself. Summoned into Smash Bros., she resembles Samus Aran and mimics some of her moves, firing Arm Cannon blasts, launching homing missiles, or even unleashing Phazon.
- EU: An exceptionally strong and terrifying being made of Phazon. She's able to regenerate, brainwash her victims and even clone herself. When summoned in this game, she'll either fire rapid blasts from her Arm Cannon, launch homing missiles, or unleash Phazon across the surrounding area, depending on where her target is.
Queen Metroid[]
- NA: Have you ever met people who thought Metroid was the name of the game's heroine? Adding Queen to the title would just make it worse. But if you show them what a Queen Metroid REALLY looks like, they won't make that mistake again in a hurry. Metroids are fearsome creatures, and the queen is the nastiest of the lot.
- EU: Have you ever met people who thought "Metroid" was the name of the game's heroine? Putting "Queen" in front might just make it worse. But if you show them what a Queen Metroid REALLY looks like, they won't make that mistake again in a hurry. Metroids are fearsome creatures, and the Queen is the nastiest of the lot.
Spirits[]
It should be noted that two fighter Spirits based on Dark Samus exists but since they don't have stats associated to them, they are not listed here as they would just be images.
Primary Spirits[]
The only Metroid related primary Spirit is the Queen Metroid, who is featured as a Legendary grab type spirit.
No. | Image | Name | Type | Class | Slots | Stats | Ability | Acquisition |
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281 | Queen Metroid | Grab | ★★★★ | 3 |
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Jump ↓ |
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Support Spirit[]
The only Metroid related support Spirit is an ace spirit depicting a Metroid Larva.
No. | Image | Name | Class | Slot Cost | Ability | Acquisition |
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277 | Metroid | ★★★ | 2 | KOs Heal Damage |
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See also[]
Metroids | |
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Natural line | Metroid Larva • Alpha Metroid • Gamma Metroid • Zeta Metroid • Omega Metroid • Queen Metroid |
Phazon line | Miniroid • Phazon Metroid • Hopping Metroid • Metroid Hatcher |
Phazon mutants | Fission Metroid • Hunter Metroid |
Created by external means | Dark Tallon Metroid • Mochtroid |
Unique specimens | Metroid Prime/Dark Samus • Samus Aran |