Metroids are the titular creatures of the Metroid series. They are organisms created by the Chozo. First discovered on the planet SR388 years after their introduction, they were promptly used as a bioweapon by the Space Pirates. Metroids feed on the "life energy" of their prey in a manner similar to the way a leech drains a host organism's blood. Unlike leeches, Metroids leave all of their prey's blood and internal organs intact yet lacking the energy necessary to sustain life.
Powers and Stats
Tier: Unknown | At least 6-C | 5-B
Name: Metroid, Ultimate Warrior (Chozo Translation of Metroid)
Gender: Hermaphrodite (the Queen Metroid doesn't need a mate)
Age: Varies (A Metroid will change forms as it grows older, Omega Metroids being considered full adults.)
Classification: Alien parasite, Galactic apex predator
Powers and Abilities: Superhuman Physical Characteristics, Superhuman Speed, Levitation, Life Absorption, Transmutation (Turns the host's body into dust when touched.) Size Manipulation (Grows larger with the more Energy it absorbs.) Transformation. | All previous abilities, Electric Armor as an Alpha Metroid, Energy Projection (Gammas and Alphas can drop balls of energy), Electricity Manipulation (Gammas and Zetas can surround the arenas with electricity, can also create an electric shockwave) Fire Manipulation (Alphas and Gammas can shield themselves with fire. Zetas can fire several fire balls), Adhesivity, Invulnerability as a Zeta Metroid. | All previous abilities, Large Size (Type 0, Type 1 as a Metroid Queen), Regeneration (Mid-Low) as an Omega Metroid (Can replenish the armor plating on its core), Metroid Hatchling Summoning as a Queen, Acid Manipulation as a Queen, Enhanced Senses.
Attack Potency: Unknown (The Galactic Federation stated that a single metroid has the potential to wipe out a whole army, though its attacks depend on life-draining abilities) | At least Island level (Capable of damaging a basic Post-Zero Mission Power Suit, each stage are depicted as superior to the previous one) | Planet level (Capable of taking on a fully powered Gravity Suit Samus, posing a grave threat to her)
Speed: Massively Hypersonic+ (Capable of reacting and damaging the Pre-Zero Mission Varia Suit Samus) | Massively Hypersonic+ (Capable of reacting to Post-Zero Mission Power Suit Samus) | Massively FTL+ (The Omega Metroids, despite their massive size, are shown to be almost as agile as end game Samus Aran. Similarily, the Metroid Queen has been depicted as capable of attacking fast)
Lifting Strength: Unknown (Even the larval stage of the Metroid species is capable of levitating under Zebes' extreme gravity)
Striking Strength: Unknown | At least Island Class (Strikes Post-Zero Mission Varia Suit Samus as the main form of attack) | Planet Class (Capable of inflicting severe harm to Post-Zero Mission Samus) | Unknown (As the Baby she was not capable of inflicting damage through conventional means, like its larval stage) | At least Planet Class (Casually swiped away the entirety of a weakened SA-X's health, reduced Gravity Suit Samus from full health to 1 health in one claw swipe)
Durability: Planet level (Resists all of Samus' normal weapons unless frozen), Island level when frozen. | At least Island level (Can take hits from Legendary basic power suit Samus). | Planet level (Able to resist attacks as the Omega Metroid and Queen Metroid). | Planet level (Able to attack Mother Brain as the Baby). | At least Planet level (Resisted several of SA-X/ Fusion Gravity Suit Samus' hits).
Stamina: Varies depending on how much energy they have consumed, but it is incredibly high, on average
Range: Standard Melee Range | A couple of Meters as an Alpha Metroid, several tens of meters as a Gamma Metroid (Can electricity the entire floor of a room, fire a blast of electricity across a room and release a shock wave almost completely affecting some rooms) | Several dozens of meters as an Omega Metroid, possibly Planetary as the Metroid Queen (Originally, the Metroid Queen would create earthquakes throughout SR-388 whenever a certain amount of Metroids died. Was somehow aware of the events that took place during entirely other areas of SR-388)
Standard Equipment: None notable | Their nuclei become significantly more vulnerable in their older stages.
Intelligence: Basic animal instincts, however, as an Omega Metroid it shows signs of being able to use strategy, including attacking in more than one ways at once to surprise attack the enemy.
Weaknesses: Weak to extremely cold temperatures. | Older Metroids begin to be slightly more resistance towards the cold. | None Notable
Key: Larval Metroid | Alpha, Gamma, Zeta Metroids | Omega Metroid, Queen Metroid
(Credit to Metroid-Database for most of the images.)