History Characters / MetroidOtherAntagonists

* NonStandardGameOver: While on Phaaze, Samus will become stuck in Hypermode, slowly killing her until she's transformed into another Dark Samus.

See Characters/MetroidMetroidPrimeAndDarkSamus for both Prime and Dark Samus.

[[center: [-[[Characters/{{Metroid}} Main Character Index]] | [[Characters/MetroidSamusAran Samus Aran]] | [[Characters/MetroidTheMetroids Metroids]] ([[Characters/MetroidMetroidPrimeAndDarkSamus Prime]]) | [[Characters/MetroidSpacePirates Space Pirates]] ([[Characters/MetroidMotherBrain Mother Brain]] | [[Characters/MetroidRidley Ridley]]) | [[Characters/MetroidXParasites X Parasites]] | [[Characters/MetroidGalacticFederation Galactic Federation]] |\\
[[Characters/MetroidTheChozo Chozo]] ([[Characters/MetroidRavenBeak Raven Beak]]) | [[Characters/MetroidBountyHunters Bounty Hunters]] | '''Other Antagonists''' | [[Characters/MetroidOthers Others]] | [[Characters/MetroidNoncanonicalCharacters Noncanonical Characters]]]]-]

* UncertainDoom: The Tallon IV and Aether Leviathans seem to have died between their landing and the events of their respective games. While the Aether leviathan could be resumed to have died in the cataclysm that split Dark and light Aether, there's no apparent explanation for why the Tallon IV Leviathan doesn't appear in the impact crater (unless it became all Phazon on the planet as a part of its natural life cycle, or the Metroid Prime ate it. The WombLevel nature of the impact crater suggests that it is slowly dying but Metroid Prime does have a voracious appetite...).

->''[[AC:"Phaaze is an organism of gigantic proportions, which consists entirely of Phazon. Phaaze orbits a small star 361 lightyears away from Federation space. Intelligence suggests that Phaaze itself is intelligent to a degree; the so-called "Phazon Seeds" are created and fired by it as part of its reproductive cycle."]]
-->'''Scan Data'''

->''"Darkness... coming..."''

[[quoteright:1000:https://static.tvtropes.org/pmwiki/pub/images/img_1670.jpeg]]

Initially thought to be a strange yet exploitable energy source, Phazon is really a lifeform in itself. It spawns as living meteors known as Leviathans from its parent planet, called Phaaze, slowly swallowing all life and corrupting the planet so the cycle can repeat. It is the [[GreaterScopeVillain secret antagonistic force]] driving the plot of the ''Prime'' trilogy.

* AlmightyIdiot: Phazon is incredibly powerful, dangerous, toxic, and responsible for everything in the ''Prime'' trilogy...but it doesn't seem all that intelligent or have any goal except 'spread some of myself every so often.' It isn't until Dark Samus hijacks it that it has any agency beyond that.
* AlwaysSomeoneBetter: While phazon is powerful and sentient, Dark Samus proves to be more dangerous. When she comes to visit Phaaze, she manages to hijack the collective consciousness of phazon and bend it to her will.

* BoringButPractical: Firing off a few leviathans every century at whatever planet seems the best fit at the moment? Not flashy and not the fastest way to spread, but it works. When Dark Samus takes over and starts using a more AwesomeButImpractical plan involving using leviathans as weapons to target her enemies, it ends up drawing attention Phaaze had avoided until then and causes its destruction.

* EldritchAbomination: Revealed in ''Prime 3'' to be basically a huge transdimensional being with a heart the size of a planet. The Chozo's whole ascending to a "higher" dimension thing? That actually ''reduced'' their ability to fight it.

* GeniusLoci: Its core is Phaaze, a huge sentient planet.
* GreaterScopeVillain: In the ''Prime'' trilogy. It is the source of all the conflict, but other beings -- Metroid Prime and Ridley in the first game, Emperor Ing in the second game, Dark Samus in the third -- serve as individual {{Big Bad}}s in their own games.

* HostileTerraforming: How Phaaze reproduces. Tallon IV, Dark Aether, Bryyo, Elysia and the Pirate Homeworld are all in early stages of the process when Samus arrives. It's unknown if Phaaze itself is the original source of Phazon or if it was terraformed by a Leviathan launched from somewhere else in the universe.

* NonstandardGameOver: When Samus spends too much time in Hypermode, the Phazon will corrupt her and turn her into a replica of Dark Samus. On Phaaze, you're stuck in Hypermode and this will slowly kill you.

!Ing
[[folder:In General]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/ing_3.png]]
[[caption-width-right:350:'Ing' means ''terror'']]
->'''Debut:''' ''VideoGame/MetroidPrime2Echoes''
->''"It was the end of peace on Aether, for a new race was born that day on the dark world... one filled with hate and terrible power. They are the Ing."''
-->--'''U-Mos'''

Creatures of darkness created when a Phazon meteor interacted with the Luminoth's planetary energy system. They seek to escape their pocket dimension and spread throughout the galaxy in a campaign of extermination.

* UncertainDoom: The Tallon IV and Aether Leviathans seem to have died between their landing and the events of their respective games. While the Aether leviathan could be resumed to have died in the cataclysm that split Dark and light Aether, there's no apparent explanation for why the Tallon IV Leviathan doesn't appear in the impact crater (unless it became all Phazon on the planet as a part of its natural life cycle, or the Metroid Prime ate it. The WombLevel nature of the impact crater suggests that it is slowly dying but Metroid Prime does have a voracious appetite...).

* ClimaxBoss: The battle against it is more or less the finale to the game's central plot thread, as it is both the leader of the Ing and the guardian of the final Light of Aether. However it isn't the FinalBoss, Dark Samus is.

* FinalBoss: What it's set up to be, only for Dark Samus to swoop in as the PostFinalBoss.

* MarathonBoss: Due to having two forms, limited opportunities to do real damage on it, and being difficult to hit due to its speed, it is one of the longest bosses in the series. The game even acknowledges this by letting you scan it's corpse (when most other bosses [[EverythingFades don't leave a corpse]]) where the scan log tells you, [[OverlyLongGag on no uncertain terms]], that it is DeaderThanDead.

* MarathonBoss: One of the longest boss battles in the series.