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Bravely Default and FF V take place in the same world but at different times.
To prove this turn either world map upside down, it's the same, right down to crystal locations, minus some very possible continental shifts, Crescent island even still has the ancient civilization under it in the form of a bonus dungeon, it could very well be that DeRosso and Yulyanna found out about crystals regenerating upon reading texts talking about the events of FF V, and they're the only two games where you get a vehicle that doubles as a dungeon.

The games all take place in the same galaxy
However, in the FF 'verse, humans never came from earth. We don't know where they came from, but eventually they spread out amongst the stars through either magic, science, or some combination thereof.
  • Dissidia seems to joss this, indicating that all the worlds are in different universes connected thanks to the Void.

Every game is a sequel
What happens is when a character or an event happens to royally screw up the space time continuom, they create a rip in the fabric of existence and make the next game have more insane and bizarre plots and characters.

Gilgamesh was the reason behind every "crossover"
First, Gilgamesh learned how to jump between the FF worlds after being banished into the Void (and Famed Mimic Gogo mimed this ability, allowing him/her/it to go into the FFVI world). Then, he went looking for Excalibur in the FFII world after the Emperor was defeated, but he couldn't find it because Firion and co. already took it from Ricard's widow. So instead, he brought his kid, Kain and Leon to the FFIV world and dropped them off there, which makes sense because the FFII Kain said he wanted to become a Dragoon, and the King of Fabul said that Deathbringer was left there by a Dark Knight named Leonhart.

The Espers (or Phantom Beasts) in Final Fantasy VI are the same entities as the summons from nearly every other Final Fantasy game, and FFVI is their origin story.
Rather than dying at the end, they are reborn in the Esper World, able to live as magical creatures without messing up their original homeworld. Over centuries, they learn to extend their perceptions into other worlds and increase their powers until they become almost godlike; they devote themselves to aiding those who fight evil in those other worlds, offering their powers as Summoned Beasts to heroes. (Why do the summons work differently in different games? Different rules of magic in each world limit their ability to manifest.)
  • Or, they did die, and were reborn on Spira as humans... in Zanarkand. And then proceeded to become Aeons. After death in the ending, they came back via materia from the Lifestream in FF7, keeping summon-form because they technically didn't reincarnate. After being summoned enough times there, they gained enough power (MP) to exist independant of a summoner, then left for the Summon Realm to help out the other various worlds.

Bahamut is the Zenith Dragon/Divine Dragon and Shinryuu/Lord Dragon is the Grand Dragon.
The Square-Enix fusion fused the Crossover Cosmology as well. Zenith Bahamut has tried setting up up a society from time to time in different worlds; dragons, Eidolons, Zenithians, etc. He's a tad xenophobic, but ultimately a good guy. Lord Grand Dragon mostly tests heroes in the Bonus Dungeon, but he did help Cid of the Lufaine in Dissidia Final Fantasy.

All Final Fantasy games take place on the same world, at different times.
Same races, similar magic This is easy enough to support, since any landmass-shifting can be explained by the various catastrophes that befall the world each and every game. To be honest, this can also explain why nobody remembers the events of other games, since they either descended into myth or the Götterdämmerung smashed humanity to bedrock (Meteor/Holy in FF 7 being the best example i can think of) Notably, in FFX-2, one character theorizes about using the planet's soul energy for power... which was the theme of the first half of FF 7. Different methods of using magic are cause either by evolving traditons and refinement, or from previous knowledge being lost the same way knowledge of the other games is.
  • Dissidia Final Fantasy appeared to actually confirm this in the first trailer, all but confirming that the abnormal events of bringing together heroes and villains from the first ten incarnations of the world in this game is essentially Chaos trying to stop the cycle between the twelfth and thirteenth incarnations, and Cosmos being forced to act abnormally to continue it. Speaking of which...
  • Further corroborated by the fact that Squall Leonheart seems to have descended from Leonheart of FF 2, and a book in FF 8 even seems to reference FF 2's storyline.
  • The vast differences in advancement of civilization (the early games have kingdoms and empires, whilst 7 and 8 have countries with corporations or modern civil governments as did Zanarkand-age 10, and 12 seems to be somewhere in the Renaissance) and technology (no tech except the very rare airships in everything up to 5, Magitek in 6, full tech in 7 and 8, back to medieval in 9, full tech in Zanarkand knocked back to dark ages by Sin in 10, and back to tech again in 12) can be explained by having the timeline of FF on a wave curve of advancement versus decay - when the curve is going up, civilization is advancing - populations are growing, countries modernize, tech advances, etc. - then it reaches a peak and hits a downward slope of decay - tech fades into uselessness or begins having Dark Tower-esque dysfunctions, modern civilizations degrade back into feudal system, and so on. (This is, of course, assuming the games were released in chronological order.)
    • Combining this with a slight re-interpretation of the "Trapped in the Time Loop"/Dissidia theory, we could also say that there is truly only one major villain in the FF universe - Garland, constantly being reincarnated:
      • FF1: The Fiends turn Garland into Chaos. The Light Warriors slay him, Time Loop, presumably there's some sort of temporal crash eventually. Garland's soul, empowered by becoming Chaos, haunts the earth.
      • FF2: Garland either reincarnates as Emperor Palamecia, or possesses him. Killed by Firion's group, attempts an immediate reincarnation (Light Emperor), but the quick action of some already-dead heroes prevents that.
      • FF3: The Imbalance. Whenever the forces of Light or Darkness get out of balance, Garland siezes the opportunity and manifests through them. He did it once before as an Incarnate of Light and was beaten, tries again this time around as Cloud of Darkness and fails again.
      • FF4: The Lunarians are presumably a peaceful species, Zemus being the only exception - we can chalk that up to Garland's influence. Drives Zemus into a hate-fed rage over many years, so powerful that when Zemus is killed Garland can harness that energy to forge himself a new body - poof, Zeromus.
      • FF5: Reincarnates as Enuo. Gains power, masters Void Magic... gets himself killed. Before he can attempt a new plan his soul gets bound to a tree, so he starts messing around with that and eventually merges with it, creating ExDeath. Manipulates events to get himself free, tries to go after more power with the Void... ends up overestimating his own abilities in this form and screws up, hence NeoExDeath. Killing him resets the cycle, back at square one.
      • FF6: Reincarnates as Kefka, but without knowledge of who he is or what his purpose is - perhaps a side effect of the NeoExDeath screwup. Goes through life fairly normally, though there are slight hints of his evil potential, as he signs up for the military and ends up becoming an officer. Volunteers for the Magitek project, which breaks his psychosis and partially revives the Garland personality, but now twisted with insanity. This time around he finally gets what he wants, and nigh well obliterates everything, but gets killed off before he can finish the job.
      • FF7: I'm partial to the Jenova is the Real Villain theory myself, and personally I think she makes more sense in this line of thought. Comes to earth, screws with the Cetra, gets sealed away rather than killed. Found and used for experiments, Sephiroth gets created, giving Jenova a perfect puppet. She mentally manipulates Sephy into doing all the stuff he does through the game. Decides to challenge the heroes herself finally at the end, first alone (Jenova Synthesis), then tag-team fused with Sephiroth (Bizarro - tell me I'm not the only one that sees the second head on Bizarro looks female, suggesting a woman hanging with her arms around Seph's neck and shoulders). When that fails Jenova/Garland is dead, sending the soul back to prepare for another reincarnation, but s/he gives Seph the rest of their power, hoping he can finish the job, and of course he doesn't. AC on the other hand was out of Garland's control - that was Seph/Seph's clones trying to do things on their own and failing miserably.
      • FF8: Garland decides to try the mind-control/possession route again. Notice how all the sorceresses go berserk after a while? That's Garland messing with their brains. Unfortunately his control isn't as precise this time around, especially after Ultimecia tries that crazy "Time Compression" trick. Let's not try that plan again.
      • FF9: Reincarnation isn't working. Mind control isn't working. Let's try Chessmaster. Garland (the FF1 one, not the one from this game, of course) decides to sit back and influence the world indirectly, rather than deliberately controlling things. Kuja, the rejected prototype? Let's encourage those feelings of overconfidence and, later, worthlessness and desperation. A magic crystal that controls life? Let's influence him to blow it up! When that fails to kill the heroes and obliterate the world, hey, Kuja just destroyed a Cosmic Keystone of life energy! Garland takes advantage of all that stray unused energy and incarnates again as Necron. Fails again.
      • FF10: This time Garland decides to combine reincarnation with a little bit of civil manipulation. Incarnates as Yu Yevon, who turns himself into Sin. His body can only be destroyed by a really powerful Aeon, and when it does he just possesses that and turns it into a new Sin, yay eternal reincarnation! Furthermore, let's convince the whole world it's their fault Sin's here, so the only way to get rid of it is to keep killing it, fueling the cycle. Then someone got tired of that plan and decided to make someone who wouldn't play by the rules. You think by now, you'd have expected something like that, Garland...
      • FF12: This is the one, at least for me, that doesn't seem to fit in this theory. Neither Vayne nor Venat really has the kind of mentality that most of the former FF villains had by endgame. Thoughts?
      • Garland/Chaos is Ivalice (the world, not the country). That's why so many major adventures happen there. Alternately, he just hasn't shown up yet, and when he does it will link all the previous ivalice stories.
      • No, neither Vayne nor Venat were really fitting with Chaos' ideals; the other Occuria are. Meaning that you are actually the bad guys. This seems to be a trend with Ivalice games.
      • Mayhaps Garland/Chaos has had little to do with Ivalice. Perhaps all the reincarnating in Final Fantasy X drained most of his power so he was only able to affect the events in XII very little, such as starting the war. Perhaps he had some sort of plan to regain power and so was manipulating things until the heroes killed Vayne Solidor/Vayne Novus/The Undying and brought peace.
      • So where does XIII stand on that then?
      • Well, maybe Pulse is the same planet from FFVII a long time after it went all natural, and Garland was the Maker that created the fal'Cie. Hell, the some of the fal'Cie apparently try to bring back the Maker which could've been Garland's plan to be resurrected again.
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  • Jossed by Word of God, FFX takes place in the same universe as FFVII, but on another planet and at an earlier point in time, so earlier in fact, that the boy Shinra in X-2 is not just a Shout-Out, but the ancestor of all humans on Gaia after the Cetra.
  • Maybe not. Perhaps all the games don't take place on the same world but rather in the same universe. Additionally each game might not be in chronological order so the theory could still work.
    • Completely Jossed by Word of God in the form of an official Ultimania guide, each Final Fantasy game takes place on a different world in a different dimension, all of which are connected thanks to the Void.

Chaos is fighting in Dissidia to protect the twelfth incarnation of the world in Dissidia and Cosmos wants to destroy it so she can create the thirteenth incarnation
Cosmos is in fact the creator goddess in the fictional mythology of Final Fantasy XIII, while Chaos is very much the god of the first twelve worlds. The crystals are key because they are required to create the thirteenth world, but this can only happen by destroying the previous one, being Ivalice of Final Fantasy XII.
  • Jossed by duodecim, since Cosmos lost the war (though it was already implied in the original Dissidia)

All Final Fantasy games take place in the same universe, but on different worlds.
A statement by series creator Hironobu Sakaguchi confirms that the descendants of Shinra from Final Fantasy X-2 eventually developed space travel, left Spira, and colonized Gaia, the world of Final Fantasy VII, becoming the ancestors of the humans who supplanted the Cetra.

All Final Fantasy games take place in Final Fantasy's Stable Time Loop.
Each time the world is reset, the geography changes and 2000 years of history play out differently. The Four Fiends and the Big Bad are reincarnated in different forms, and the heroes never discover the time gate, instead destroying the latest incarnation of the Temple of Chaos and unwittingly dooming their continuity. This, naturally, puts The Final Fantasy at the very end of the series. And turns the rest of the series into a Shoot the Shaggy Dog story.

Cid Highwind is a descendant of FFIV's Kain.
Let us count the similarities: blonde hair, uses polearms, last name Highwind... at the end of FFIV, Cecil and Rosa live happily ever, while Kain and Rydia strike out on their own... or do they? Add in the fact that they have a space-travel-capable ship, and it's entirely possible that they got together and emigrated to a new world, hoping to start a new life (and a family) there.
  • Jossed by After Years. For one, Golbez piloted the Lunar Whale away to find Fusoya. For two, Edge and Rydia kind of establish a relationship (and at the very least Rydia shows she is too busy rebuiling Mist). Finally, Kain becomes the head of the new Red Wings, so he's not about to leave.

Gilgamesh is the true master behind everything that's taken place in the entire series.
That's why he isn't in Dissidia: he's busy pulling the strings of all the characters behind the scenes.
  • B-but he WAS a Summon in Dissidia...
  • And he's in the sequel...

Final Fantasy - universe was originally created without any magic and the majority of people didn't have magical powers before Final Fantasy seven
FF world didn't have the magic to begin with, but its creator held all the magic within himself/herself. He/She created powerful, magic-wielding avatars called Espers that were able to teach magic to certain men or women who had the "magic gene" and needed it to save the world. Ability to wield magic was bestowed upon few, selected people.

However, between Final Fantasy VI and Final Fantasy VII'', something went wrong. People who had the "magic gene" married each other, maybe even formed societies, and the gene spread like a cancer, becoming essential part of the people's DNA. This allowed anyone to train themselves as mages/summoners/etc if they wanted to do so.

  • This mystifies me as FF III, FF IV, and FF V held summons, maybe they all left the normal world for fear of their use and that adds to the events of FF VI, then they return as summons and teach magic (as Espers) which ANYONE can use. At the end of FF VI all the Espers vanish to help restore the Earth being part of the life force. I think this would become the new Materia for FF VII
Kupo is a swear word.
All the moogles are really foul-mouthed and know they can get away with Cluster F-Bombing everyone they meet because it sounds cute to them.

When all the Hum(ans)e, Bangaa, Veira, Mithra, annoying hobbits from FFXI, yeti, etc leave the room the moogles belittle them for their lack of pom-poms.

Moogles are dicks.

Kupo actually means "Shit" In polish.

Chocobos evolved from Yoshies.
Hey, if chickens evolved from dinosaurs...

Balthier is Immortal
As shown in the ending of Final Fantasy XII, he's the Leading Man, and he can never die. This is explains why he's in Final Fantasy Tactics, thousands of years into the future, because he never died. He even mentions that he misses Airships, since that era is without them. At the end of the game, Ramza and everybody might have died, but Balthier definitely lived. Fran's immortal too, but she's hiding someplace. A corollary of this is a proof that Vaan is actually imaginary since he shows up in Final Fantasy Tactics A2, which takes place in a dream storybook Ivalice.

Balthier is a Time Lord.
What. Someone had to say it.

The True Origin of Tonberries... that they were spawned by an unholy union between Kermit the Frog, and Satan. We can only assume that quite a bit of alcohol was involved.

All the games are dying dreams of the main characters.
Why else would they be named Final Fantasy?
  • Artifact Title because the original game was supposed to be Hironobu Sakaguchi's last game. It could also refer to the fact that the Warriors of Light in the first game end a Stable Time Loop, making it the final iteration of a fantasy. This could, by extension, be applied to some of the other games. Final Fantasy VIII also features a Stable Time Loop (sort of) and Final Fantasy X features the final pilgrimage to defeat Sin.
  • There is one theory for FFVIII. Who will dare to come up with a theory for every game?

The Crystals are actually Huge Materia.
Crystals are actually nothing more then highly condensed Mako, and thats also why they can teach abilitys via class changes.
  • Possibly Jossed by Final Fantasy IV: The After Years, where it's established that the crystals are magical terraforming agents sent by The Creator; its extremely doubtful that Materia, no matter how big, could actively make a planet more earthlike by mere presence with no active user.
    • Though that's only true for the FFIV Universe. The Crystals play different roles and have separate makers in each version.
      • Its heavily implied to also be true in I and V, given that the effects of the loss of the crystals in both of those games is entirely consistent with the loss of Cosmic Keystone terraforming agents. "The wind stops, the sea is wild, the Earth begins to rot", etc. Even if they weren't sent by The Creator, they're still terraforming agents that operate independent of human users, whereas most Materia is inert and inactive without users after leaving the Lifestream. Plus, since materia is a product of the lifestream, not the lifestream itself, the fact that loss of a Crystal has major environmental effects shows that they're much more important, cosmologically, than materia; for a similar effect using materia, you'd have to destroy the Lifestream itself.

The Blue Planet is Pern
In FF1, it's pretty obviously post-apocalyptic in that there's a space station in orbit that can be reached by a teleporter from a space-age skyscraper. And one of the dragons tells you there was once a time when humans and dragons lived together. FF4 confirms that the Crystals are terraforming devices placed by a Precursor, and FF9 confirms that Black Mages are automatons designed as weapons. Here's what went down.

Late in Pern's history, medical and military science achieved "soft" SF levels; phasers, medical tricorders, etc. The only caveat was that the correct device needed be used for the correct ailment; a detoxifier wouldn't close a wound, neither would an ocular surgical laser purge poison, or an energy-suture heal blindness. Military robots were constructed, though primarily used commercially as security forces, with only a select few being equipped with superpowered weapons. Power sources were all ZPMs. The Pernian human race launched a massive military satellite, codenamed "Sky Fortress", to do away with this "thread" bullshit once and for all. They destroyed the Red Star, resulting in the unholy mother of all Threadfalls. Dragons and humans both were subsequently driven to near-extinction. In-development bioweapons, part of "Project Eidolon", broke free, some of them truly horrific in nature, such as "Lich", a project to extend human lifespan with nanotechnology that instead ended in Body Horror. The robots became self-aware, concealing their nature from other creatures with dark robes and ridiculous hats. Because of the highly destructive and mysterious nature of their equipment, and their dark robes, they became known as "Black Wizards". A cult also sprung up around the healing tech; the "priests" became known as "White Wizards". Later on, some humans learned how to operate equipment from defunct Black Wizards, furthering the confusion. In any case, this is the reason spells are bought the way they are. The reason some individuals, IE Terra or most of the FF4 cast, can cast spells naturally is due to descent from an Esper or Eidolon.

Every game takes place in an alternate universe version of the same world.
  • And some of the characters are recurring.
    • Cloud is Lightning
    • Yuffie is Rikku
    • Cid Highwind is Cid Highwind

tl;dr Final Fantasy is really Final Softsciencefiction; all the magic is sufficiently advanced technology and all the weird critters are bioengineering projects that went wrong or were left half-finished.

All of the games are actually a look at the thoughts of one man.
Came up with this recently. All of the games aren't actual events happening in different universes; they are all the thoughts of the storymaker who made up these fantasies. His first work was a simple "save the world" plot, but as he progressed through his life he added more and more elements into his stories. The main series are his main tales, the spinoffs are his other works.

Either Final Fantasy XV or XVI will go the Mega Man 9 route
  • What I mean, is that it will be a downloadable 2D game to please the old school fans. It will have 16-Bit graphics, PS1-style FMVs, and the occasional voice acting.
    • With the 25th Anniversury of the franchise being next year, I'm sure they'll have something for us. Maybe not a game in the main series, but a spin-off following the classic style.
      • Wasn't the game "The four heroes of light" supposed to be that ?
      • Final Fantasy Dimensions was an episodic game made during 2010-2012 and was made for NTT DoCoMo, iOS and Android, it is also a throwback to Final Fantasy V.

Every game is a retelling of the same story
Like The Legend of Zelda theory that every game in the franchise is the same story being retold by a different person, there is one legend of a group of heroes going on a quest to save the world from a great evil, probably involving crystals and chocobos and moogles etc., passed down through the ages, adapted and distilled and so on.
  • Final Fantasy is the most stripped-down, bare-bones version of the story, probably its initial inception in medieval times or a summary on Wikipedia.
  • Final Fantasy VII is told circa the 80's, between schoolkids or written down in novel form.
  • Dissidia is fan-fiction. Even moreso than it is now.

Every game takes place in the same universe, but…
While some instances are on the same planet (thinking of II and IV with their many connections), the fact that it's told as a legend means that nothing is reliable. So for instance, the map we see in just like a map of our world in the Medieval times : strongly incorrect. All inconsistencies can be explained the same way : being legends, time has changed them beyond recognition.

There are actually two species of Moogle.
One species, featured heavily in Final Fantasy XII, have a more detailed, animalistic face and clothing and are the base species of Moogle/moguri. The more cartoonish, teddy-bear-faced mogs/moogles/Moguri with no clothes (easily seen in Kingdom Hearts) are related or arose by parallel evolution, and should more properly be called naked mole-bats.
  • To flip this theory, the cartoon moogles came first. The so-called Moogles of Final Fantasy XII originated as the remaster version of the Hummingways and later evolved pom-poms. The people of Ivalice dubbed them Moogles after they noticed the resemblance, and the name stuck.

Final Fantasy is set within the Multiverse
  • Recurring characters like Shinryuu & Omega, Gilgamesh, and the summons are actually Planeswalkers.

Gilgamesh is secretly Bender in disguise, with some amnesia.
  • First of all, this is Self-explanatory since his appearance in Final Fantasy XII, but John DiMaggio's absence as of Dissidia Final Fantasy perplexes me. Now, onto business - the main reason he's here in the first place because ExDeath was the one to summon him first as an indestructible henchman. One bump in the continuum later, Bender loses his memories on his way, and ExDeath dubs him something or other. (To be continued)

David Bowie is Chaos.
If you look at several of the villains of the Final Fantasy games, you may notice at least a passing resemblance to David Bowie (see Emporer Mateus, Kefka, and Kuja). Even Ultimecia looks a fair deal like Bowie in a good amount of makeup. Combined with the fact that Chaos could be every villain, logically David Bowie and Chaos are, in fact, the same being. As a side note, also consider that David Bowie is the shapeshifting sovereign of all villainy.

The FF-Verse is split into two distinct continuities which both begin from Final Fantasy I.
Final Fantasy I sets everything up. It's a world where magic is predominant over technology, but it is clear that technology was dominant earlier in the world's history. From there:
  • In the first continuity, once the Stable Time Loop is resolved, someone finds the airship that the Warriors of Light discovered and uses it to finally get to the northern continent, where he finds Lufenia and discovers more technology that they used. From there, technology became predominant, leading to Final Fantasy VI, which led to Final Fantasy X, which led to Final Fantasy VIII, Final Fantasy VII, which led to Final Fantasy XIII, where Pulse is the Planet from FFVII and Fal'cie are the Lifestream after having millions of years to change and eventually take on multiple physical forms, which later became independent beings that formed factions, one that built Cocoon and another that stayed on Pulse. Since the events of FFVII, Materia have returned to the Lifestream and manifested in XIII as the Crystarium and l'Cie sigils.
  • In the other continuity, the airship is destroyed or stops working before anyone finds it and the story continues with magic as the dominant force. This leads to FFII, to III, IV, V, IX, and XII. XI and XIV are not canon due their being Multiplayer nature.

Kain is Ricard's son.

No, really. It's a multi-dimensional travel thing.

  • Jossed, since Kain stated in After years that he was about the same age as Ceodore (Cecil and Rosa's 17-year old son) when he lost his father, and Kain in Final Fantasy II looks to be about maybe 5 or 6 years old when Ricard dies

The hotdog in FFVIII's last cutscene was actually Ultimecia.
It chokes Zell and almost kills him. A clever last ditch attack, if not for Selphie being there Zell may be dead and Ultimecia in the form of the hot dog would possess his body and atttempt to kill everyone else again

Every game is a sequel, and also not a sequel.
Every world in the Final Fantasy verse is equipoised between being a sequel of each world in the verse. While Final Fantasy VIII is a sequel to Final Fantasy III on one 'wavelength', on another they have nothing to do with each other, and it's instead X that takes place in VIII's world (Lulu is a sorceress, obviously). Same goes for VII and X, VII and IX etc. They're all sometimes-but-sometimes-not sequels. The Final Fantasy verse exists in a gigantic quantum Shrodinger soup, shifting the various worlds against each other in a phenomenon I shall dub 'plane tectonics'.

The thirtieth Final Fantasy game will be a porno.
Seriously - will there be any OTHER option for a game called Final Fantasy XXX?

Cid is a Time Lord!
I can't believe it hasn't been said yet. It's so obvious! Many different incarnations, all with the same name. Good with technology. Older and wiser than others in the cast. Owner of a cool space/air ship that is Bigger on the Inside. Appears all over time, space, and even other dimensions. It all makes sense now.
  • Of all the ____ is a Time Lord WMG, this is probably the most supportable one.

All the Emperors are one and the same!
Final Fantasy 6's Emperor Gestahl's name is similar to Secret of Mana's Geshtar and both Emperor Vandole and The Emperor of Palamecia are refered to as the Emperor so logically the same being is possessing alot of people and in Final Fantasy 6 renamed his host to Gestahl after his former lieutenant Geshtar. Considering how the novelization of Final Fantasy 2 claims all The Emperors of Palamecia were possessed by Satan he is the being possessing every Emperor in the Final Fantasy series(the first world of Mana game was called Final Fantasy Adventure so the World of Mana series counts as part of the Final Fantasy series).

On a related note: The Four Fiends from FF1 are behind the entire World of Mana/Final Fantasy Adventure Sub-Series.
Lich appears in Secret of Mana, Sword of Mana/Final Fantasy Adventure and Seiken Densetsu 3 and Kraken appeared in Sword of Mana/Final Fantasy Adventure as one of the bosses. Also should be mentioned is that both Malyris/Kary from Sword of Mana/Final Fantasy Adventure and Fanha's true identity Hexas is called Marilith in Japan.

Drakonis ruler of Mavolia(which Medusa/Anise from Dawn of Mana created and if she's the same Medusa as Sword of Mana then Drakonis is behind her creation of Mavolia which he now rules) in Legend of Mana and the Dragon Emperor of Seiken Densetsu 3 is called Tiamat in Japan(Tiamat is female so She is The Dragon Emperor???).

Considering all this does this mean Garland/Chaos is the one who sealed the mysterious Echoes(Which the Thanatos are servants of) away by creating both Fa'Diel and the place which under Medusa's control of the Thanatos would become Mavolia?

Considering how World of Mana is basically a Final Fantasy subseries: Shinryu is Secret of Mana's Mana Beast.
The have the exact same color scheme!

Final Fantasy II is a re-telling of Star Wars episodes IV-VI, but with some creative licensing
Think about it: The story involves a Princess (Leia/Hilda) who leads a group of rebels against an evil emperor (Palpatine/Mateus) who also has an incredibly powerful knight dressed in dark colors (Vader/ Leon who has some family relation ( Father/brother) to our main hero (Luke/Firion) and later joins their side against the emperor. Both our main hero and our villain use swords (Lightsabers/Standard Swords), and the empire creates a mobile super weapon (Death Star/Dreadnought) while already in control of a large group of foot soldiers (Storm Troopers/Black Knights). Among the band of rebels include a devilishly-handsome rogue (Han Solo/Paul), a coward who still tries to help the rebels as best as he can (C-3PO/Gordon), a large, strong assistant who can't or barely speak English (Chewbaca/Guy), and a bad-ass old guy who helps with the rebellion and later on, sacrifices themselves so that the rebels may live (Obi-Wan/Josef).

About Shinryu and Omega, and why the later is a tragic anti-villain
We know that Omega is a gigantic killer robot (who may or may not be connected to warMECH) who was created by an ancient civilization (Onrac?) to find and destroy Shinryu. As Shinryu can travel between dimensions, it's asumed that Omega can chase him through the Void. I propose another way to look at it:

In all the games where Shinryu and Omega appear toguether, the first one you kill canonically is Shinryu. When you "kill" him, he actually opens up a portal in space and time and escapes to the Rift. Let's asume it, a incredibly powerful and immortal dragon can't be defeated by mere humans. So what does Omega do when he finds that his enemy has escaped again? First, he tracks down those who has defeated him (your party) and unleashes its rage against you, because you basically sent Shinryu to another dimension.

You always think you've defeated it (Omega), but it doesn't matter if you win or lose, as the outcome is always the same: Omega creates a copy of himself (like a baby-omega), and then it destroys itself, and with the energy created from the explosion it opens a portal in the Rift and sends the copy through the it. Then, the new Omega adaptes itself ad changes a little bit, so it slowly evolves til he is ready to kill Shinryu. You know tha room ful of Omegas in FF V Advance? I think that was a strategy. It commited suicide several times, so he could keep changing till he would adopt a new form.

But all of this is useless, because you are always there, fighting Shinryu despite the fact that you can't really kill him, and making Omega's quest harder in the process. Now, picture this: what if Omega only acts that way because of its programing? Maybe it's able to think and feel, but he must destroy Shinryu because that's what he was created to. Put it this way: imagine that, every time it destroys itself, Omega feels a pain that can't be described with words, and every verson of Omega share memories with the last one. When it finds you, it viciously tries to kill you because, somehow, you always manage yourself to arrive to Shinryu before it and prolongue its paint a little bit longer.

Also, there is absolutly no evidence for any of this. Hey, I guess that's why they call them "Wild mass guessings"

Firaga was created by Ifrit
He took a bit of the power of Hellfire, his signature move(keyword here being "bit", leaving it still really powerful), to create Firaga. He then released the spell to Black Mages. As for evidence, well, THERE'S ABSOLUTELY NONE! I just felt like publishing a WMG based entirely based on fire, because fire is awesome.

Long before there were Black Mages,
There were Yellow Mages specializing in Thunder-based spells, Magenta Mages specializing in Fire-based spells (as well as Flare), and Cyan Mages specializing in Ice-based spells. Overtime, the 3 classes merge into one.

Ramuh does (or used to) exist in FF8 and FF10.
The reason why he doesn't make any appearance is because he died of old age. So in summary, if he doesn't make any appearance in a final fantasy entry, it's because he's already dead.
  • For the case of FF10, it's a bit different; his fayth is supposed to be an old sage, but he died before he gets the chance to willingly seal his soul in a statue in a state of dreaming.
  • It stands to reason that the world of FF8 has many, many more GF than the ones the party happens to stumble across during the storyline. And the Ultemania guide claims that even the GF known to use can take on a variety of forms. So in FF8 Ramuh might either just hanging out somewhere off-screen (he might be the old guy in Timber who likes the water so much) or he's an alternate form of Quezacotl.
  • In FF10, he might be a fayth, but his temple was destroyed by Sin and he's lost deep below the oceans.

As an alternative to above, all summons exist in every incarnation of Final Fantasy
In various Final Fantasies, the summons your party meets are either largely incidental or are approached/approach your party on purpose for one reason or the other (for example in FF9 Ramuh confronts Dagger over the business with Odin) and often, in those Final Fantasies where summons are portrayed as clearly sentient creatures at least, this ends with the summon voluntarily lending their powers to the party (and stating such) because they were impressed with their fighting ability.At the same time many FFs imply or outright state that there's a huge number of summons: Eiko mentions a tradition that at the age of 16 members of the summoner tribe are allowed to claim an Eidolon and go on adventure, would be difficult if there were only about 13 of the beasties, in VI and IV they are a whole tribe with a whole village and in FF8 we can assume that each student of Balamb Garden has at least one GF(you don't get to see Xell's, Selphie's, Quistis' and Seifer's because of gameplay and story segregation)So it stands to reason that most Final Fantasy worlds have a great number of summons more than the ones you get to meet and summon during the storyline and that some of these unseen summons are incarnations/versions of the summons from other games.

Our Earth is a realm in the Final Fantasy multiverse.
Our Earth was created at the end of the Final Fantasy XIII saga as a refuge for a dying world. Although intended to be free of the influence of magic and Chaos, a small dimensional merger causes the events of Final Fantasy Unlimited. A few decades afterward, this world is nearly annihilated by an extraterrestrial meteor that brings an army of ghosts with it. Humanity survives by the skin of its teeth, but also discovers its planet has a lifestream in the process, in the events of Spirits Within.
  • Bonus theory: The framing story of the Tactics Advance series takes place on Earth, not future Ivalice. The souls of Ivalice were migrated here by Ashley Riot in an attempt to save them from the spread of the Dark in his world.

Every Final Fantasy takes place on a different plane, and there are an infinite number of them.
Dissidia implies a whole multiverse of Final Fantasy worlds, all connected by the Rift. So every single version of each Final Fantasy game is canon. For example, Final Fantasy I has been re-released multiple times, and the re-releases are all versions of the same plane. Dissidia adds another two in the form of World A and World B. This is even more obvious in the case of the online games, which have multiple realms by default. If you wanted to take it even further, every new save game represents a new version of that plane. As a collorary, there are no true sequels: sequels take place on yet another version of the plane. That's why they don't always do a great job of matching the so-called original in tone or continuity - we literally never see the same plane twice. The history is only shared in Broad Strokes!

Final Fantasy XVI will be a PS5 launch title.
Given that if things are headed back to the traditional console generation length of five to six years, it'd make sense for Square Enix to take advantage of more cutting edge tech.
  • Half confirmed. Half jossed. FF16 was announced for the PS5, but is not a launch title.

There will be a future FF title that will take place on the ruined worlds where Shinryu and Omega originated.
Acting as a sort of Origins Episode for them. We may even play as the heroes who fight to try and stop Shinryu before he destroys the world, who may or may not be responsible for the creation of Omega in an attempt to stop him. The ending of the game will be a Foregone Conclusion (or it'll be unclear from the start that this is the first world both entities are from) where the world will be destroyed.
  • Midgardsormr, from FFXIV, may even originate in this world, fleeing from it to Hydaelyn to escape its destruction with his seven eggs.

(Please move these to 16's WMG page when it goes up.)

FF16 will have its graphics working upwards by console release.
It will first be released on the Switch where it'll have okay-above average graphics compensated by good gameplay, then the lastest X-box and PS5 with improved graphics and finally, PC for a HD release.

The guy who says "our kind do not question orders" in the [FF16] trailer will be a major villain, though probably not the Big Bad
Because he's shouting down a troop of his in response to a worry that they're getting into a pointless battle. That's got Colonel Kilgore or My Master, Right or Wrong all over it. I'm betting he's worst version of whoever the tattooed people are, presumably Super Soldiers given how the main character didn't always have that mark on his face.

FF 16 will still be a Science Fantasy, but only during the second half.
In the same vein as 9, the first half of the game will be a throwback to Classic High Fantasy; Game-Of-Thrones like European Medieval Fantasy with gameplay as a cross between The Witcher and Bloodborne. The game will be suspiciously short, and depressingly bleak, as the protagonist dies and is disintegrated to save the world from the Blight.And then a giant "Press A To Insert Disc 2" screen will show up.The second half of the game reveals the protagonist survived, only to end up in another world entirely. In their efforts to discover a way home, they also discover the benefits of science, the freedom of 'degenerate' expression, and the injustices of caste inequality. They also discover some horrifying things about their supposed medieval paradise. Rather than save the world as they did in 'Disc 1', they return to their world as a conqueror, to destroy the Mother Crystals and bring true freedom to the enslaved peasants of their Crapsaccharine World.