Digimon/WMG

Digimon are humans trapped in the Digital World via a Matrix-like simulation.
Naturally, if you die in the Digital World, you die in real life.
 * Um no you turn into a Digiegg and are reborn.
 * Unless your world is Tamers...
 * Or Unless Izzy was right during the Etemon arc.(Anyone else remember Tai's Heroic BSOD?)
 * No, in Adventure humans turn into butterflies.
 * No, that's just because he was still in the dream dimension.

When a human dies in the Digital World they are reborn as a digimon.
Because, as no things much like human (ignoring Gennai, and not counting humanoid digimon) they are recreated into the closes thing that the digital world is programmed (or whatever the proper term would be)and is turned into a a digitama and a full digimon life cycle. (Please point any holes in my theory)
 * I assume that you're trying to say is, "Since there are no humanoid Digimon, except Gennai and certain Digimon, a dead human is reincarnated into the closest Digimon that the Digital World has available as a Digitama and subsequently experiences a full Digimon life cycle." I would suspect that Gennai and humanoid Digimon put a bit of a hole in that guess. I bet that the type depends more on personality than anything else.
 * Yes, thank you (mine was phrased horribly)

Digivices back up partner digimon's memories in case it dies.
See: Poyomon's digivolution to Tokomon. "Together we can make me Patamon again!" Also, Agumon's death and revival in Savers.
 * That would make sense why Agumon had his memories, but Biyomon [Who was Krissy's UNOFFICAL Digimon] lost his memories.

Royal Knights
An aquatic digimon and a marine digimon for the final two, if that can fit into their pseudo knights of the round table scheme.
 * It would be nice if the Bearmon/Kumamon line got a Royal Knight for two reasons: Kotemon has Rhodonite/RhodoKnight/LordKnight/LoadKnight/Crusadermon so Bearmon seems left out after the Frontier movie and Bearmon is the only Digimon World 3 cover "mascot" to not have a Royal Knight.
 * There already is a beast royal knight so maybe not. There are two dragons too but it is unlikely for Bearmon still since he's been around so long without one.

Big Death Stars
A seventh member since they are based on Japan's days of the week but there are only six of them. This one will have no level just like the others and be based on the sun. It will have a planet killing ability to counter the Earth member's ability to destroy stars.
 * Knowing this franchise's love for increasing ridiculousness, the next member of the Big Death Stars won't have an ability that counters the Earth members but an ability so good it totally eclipses his.

Bancho
Four more Digimon with the title.

Chaosmon
The six remaining will not look like Omnimon

Legendary Warriors
Advanced hybrid forms for the four elements lacking them and for the corrupted warriors of darkness. Rookies for the eight elements lacking them.

Olympus Twelve
Six more members based on the Roman Pantheon, seeing as there only six right now.
 * Two more have been introduced, based on Vulcan and Venus, moving the total number up to eight. Minervamon also has an evolved form that's a little closer to the figure she's named after. The next four will probably be released in pairs as well and two others will get an evolved form between each release.

Seven Great Demon Lords and Super Demon Lords
A new Super Demon Lord based on a beast from the Book of Revelation, because Belphemon Sleepmode can't be a Super Demon lord when it's the lower form of a regular one.
 * Go to Digimon Wikia. Look up Ogoudomon. Super Demon Lord indeed - he's verging on invincible!

Digimon is a sequel to Pokémon
All Pokemon will end up extinct...except for Porygon-Z; a Digital Pocket Monster...eventually Porygons descendants will diversify and become all different kinds of Digimon.

The Digimon with visors can't see without them.

 * Well, we've always wondered how Angemon (and then Angewomon, and then Kazemon) manage to see with the visors covering their eyes. What if the visors were some kind of heavenly mystical vision... things... and without them they'd be blind (if indeed their programs include eyes beneath the visors at all! ...Well, Angewomon's evolution scene seems to depict some, and a recent card of Ophanimon showed her without her helmet...) And of course if anyone else where to look through them, they'd see Things Man Was Not Meant to Know and go crazy (or Crazy Awesome.) Or just whimper in a fetal position for a few days but eventually mostly get over it...
 * Seeing as how Angewomon has visible blue eyes in Tailmon/Gatomon's evolution sequence, I doubt that this is true. They are probably just there as vision enhancers, (confirmed in Silphymon's case: his "Head Mount Display" is used for targeting enemies) if not simply a unique design element (like the belts you see on many digimon).

Frontier happened first
Actually, my timeline is as follows: Frontier->Adventure->02 (Tamers and Savers are in seperate timelines). There are two pieces of evidence to support this: 1. Adventure mentioned that there were Digi-Destined prior to the current ones, and the only other Digi-Destined that seemed to exist in this universe were the Frontier kids (herein I will call the "Legendary Warriors"). 2. Patamon is seen being born in Frontier, and eventually ends up being one of the Adventure Digimon. If I may also further dive into the realms of Fanon, Patamon may have gained some sort of amnesia or may have been killed, turned into a Digi-Egg, and then hatched into a new Patamon for the events in Adventure.
 * This, bizarrely enough, makes even more sense when you remember Agumon saying there hadn't been any humans before the Adventure cast. This is because the Frontier crew weren't completely human for the majority of the series. They even had a Story Arc exploring how they considered themselves Digimon, and as a result felt they had a bigger stake in defeating the Big Bad. The Digital World has forgotten large chunks of history before; who's to say a technicalty like 'Oh yeah, there were Digi-destined who could turn into Digimon' warped into 'Oh yeah, there were Digi-destined who were Digimon'?
 * The last point was pre-Jossed by all of the Chosen's partners being born at the same time together on File Island, sans Tailmon.
 * The only problem with this is that technology is more advanced in Frontier than in the first two seasons, what with every 11 year old walking around with cell phones, while the kids of the first series don't have any and thought the digivices were beepers. Otherwise, I really really like this theory.
 * The Digital World itself can explain that: time functions oddly and inconsistantly within it. It's possible the Frontier kids came from their era and ended up in the Digital World's past, and the Digimon Adventure kids left their era (which is the past relative to Frontier) and entered the Digital World after a great length of time had passed inside it, but not outside it. Other than the 02 finale stating everyone gets Digimon, it is entirely possible when you consider the inconsist way time works in the Digital World.
 * Jossed because a flashback in Now Apocalymon shows the silhouette of the 5 original kids and their 5 Digimon partners
 * Unjossed - the silhouettes look EXACTLY like Tai and the others, and merely because the writers did not have time to draw different characters for one scene. It's called Executive Meddling. Another thing to remember here is that the Adventure Digimon have commented that humans look all the same to them. Besides, so they probably wouldn't remember the digidestined, only that there WERE other digidestined. I question how the human world thing works with 02's ending though.
 * Explaining 02's ending is easy: that's just Takeru writing his book. (Remember Hikari's wish at the end of 02 was that everyone would have a digimon partner) Since it was wrote in Frontier's past, I actually doubt any of the Frontier kids read it, so they wouldn't know what a digimon is.

Digisoul has always been the main method of Digivolution with a partner, only the Savers cast are aware that it exists and can use it properly.
Digisoul is the power of human emotions made into energy. Digivolution with a human partner has always worked on the basis of the Digimon gaining enough energy from their tamer to Digivolve, but it's worked differently each time - beyond Champion level, the heroes always need something extra, like the crests, Blue Cards, or DNA digivolution. The Savers cast don't have that problem. All four of the DATS team learned on their own to use greater amounts of Digisoul, but they needed BanchoLeomon's teachings to learn how to go as far as Mega, and they even unlocked a special power unique to the season, Burst Mode.

So, my theory is - everyone in the series can use Digisoul. The only ones who are aware that it actually exists are the Savers cast, mostly thanks to none other than Suguru Daimon, who discovered it, mastered it, and started being the *** out of Mega-levels with his bare fists. In the other series, digisoul is still used subconsciously for the early levels, but later levels require actual mastery of Digisoul, so the additional items/methods are required.
 * The method used in D-Cyber seems similar enough to support this theory but it becomes questionable when reading Next. After the main character first uses Digisoul, Agumon changes from the Digimon Adventure' design to the Digimon Savers design.

The Kids Parents from Digimon Adventure were the First Digidestined
Or at least some of them. Matt's Dad was very helpful to them and happened to know a bit too much about what the hell was going to. Tai's house was a point visted by many Digimon when they went to the real world, as well as a business complex seen a few times, and at one point haunted by Wizardmon, though both could be a coincidence. Izzy's parents were quite reluctant to let Izzy help with the other Digidestined, yet they weren't so much afraid of the Digimon. Lastly, when showing the first Digidestined, they were silhouettes of the kids, perhaps they get it from their parents?
 * Headcanon. ACQUIRED.

Digimon Adventure and Digimon Tamers happen in different universes, but share the same Digital world.
When Ken was younger, he went to the digital world, there he was attacked by a "Black Spore." He wasn't alone during this time. There was a kid with, it was Ryo Akiyama. This reflects the Wonder Swan games, where Ken and Ryo, who is the main character of many Wonder Swan games, beat Millenniummon. Of course, Ryo, who the fans wanted to see more of in the series, would eventually be in Tamers as well. Obviously, since Digimon was a Game in Tamers, but wasn't anything in Adventure, they must be different worlds right? .....
 * The last game featuring Ryou has him hopping between different Digital Worlds, 'borrowing' the partners of the different heroes in order to make up his character party. The end of the game has him leaving his native Adventure world for the Tamers world...
 * He even shows up in the V-Tamer manga.

Digimon Adventure and Digimon Tamers happen in the Same world, and share the same Digital world.
Or, alternatively, The Digidestined make a bunch of money by selling the Digimon material to the world, claiming all the Digimon Real World Events as Product placement or something, Hell they say in the Epilogue to Adventure 02 that TK becomes an Author. Thing is, when they Travel to the Digital World, time is displaced, So a young Ken could easily be infected by a Villain who doesn't exist yet while meeting a kid from the Future. Or....
 * Word of God says no, Adventure is not the Tamers TV Show.
 * Actually, Konaka's character notes says it is, or that the Adventure tv show aired in their universe.
 * Actually, Konaka's website shows this based on the english version of the t.v. series so the point still stands, case in point not only Ryo appears in the games but Takato, Ruki and Jenrya do as well.

Digimon Adventure and Digimon Tamers happen in the Same world, but don't share the same Digital world.
The Digital World from Tamers is a wildly different place from Adventure, not as wildly different as Frontier's, but so different enough it's easy to say they are different places. But even still, Ryo and Ken could still meet in the Adventure Digital World and Ryo could also be in the Tamers Digital World in one of two ways. 1) Remember that episode in Adventure 02 where TK and Kari went to the "Dark Ocean?" That was a different Digital World. Remember how the Internet from the "Our War Game" how it acted as a separate place from the Digital World? Yeah, it was. Remember when they talked about the Possibility of different Digital Worlds and they did that Rainbow Colour Printer thing? Yeah... There are different Digital Worlds. This then makes sense, so the Monster Makers make the one Digital world and the other is made by Loki of Yggdrasil or something.

Digimon Adventure and Digimon Tamers happen in different universes, and don't share the same Digital world.
Then again, the Epilogue to Adventure 02 makes it nearly impossible to set it up so Tamers happens afterwords, so really, Ryo just got bopped around. Or, 2) the other way Ken and Ryo could meet in different Digital worlds, is that it's not the same Ryo.
 * Nope It's the same Ryo, at the end of Brave Tamer Ryo get's to choose between the adventure verse and the tamer verse, he chooses the tamer verse, possibly because of the whole d-1 tournament thing from the last game. So this is the Canon outcome. The adventure and tamer verse's have nothing to do with each other, even that 'adventure was a tv show' thing was added by the dub.
 * According to Konaka's character notes, the 'adventure was a TV show' thing actually happened. Look at the timeline on the site.
 * Konaka's website has that information based on the english version of Digimon Tamers where this is an established fact, also not only Ryo appears in the games but Takato, Ruki and Jenrya do as well.

Ryo is in Digimon Adventure because he is famous.
Ryo is called the Digimon King in the Tamer universe, where Adventure is a TV show. He is in the Adventures show as a guest star.
 * Can't happen, Word of God says the TV show watched in Tamers is not Adventure/02.
 * According to Konaka's character notes, Adventure aired in the Tamer's universe.
 * Konaka's website has that information based on the english version of Digimon Tamers where this was an established this also not only Ryo appears in the games but Takato, Ruki and Jenrya do as well.

The Digital World was created when the universes of Re Boot and Pokémon collided.
Digimon are actually Pokemon that were mixed with various programs. Each type of digimon was a different type of program. The Vaccine digimon were Guardians and the Data digimon were sprites and binomes. No points for guessing what the Viral digimon were. Also, the digivices are keytools that were combined with pokeballs.

Digimon Seasons 1 and 2 are a TV show in the EVA world.
Agumon and Veemon's upper digivolutions look like EVA, and the light-hearted message of banding together with your friends, some of whom look weird and have self-esteem issues, to fight scary, evil monsters is meant to help the general public accept the existence of the EVAs and NERV (someone's gonna ask where those big robot-things come from, right?) as part of the battle for good. Gendo is a fan of the Digimon Emperor, who he emulates by wearing glove and acting like a BAMF.
 * Most of episode 53 of Digimon Adventure takes place with the characters floating in a white void while recycled animation plays with new voiceovers. Sound Familiar?

The true mission of the digi-destined is to revive the real Royal Knights
First of all, Lucemon "Satan Mode" isn't really Lucemon's evolution, is his "pet"(if remember, the REAL lucemon in the final battle of frontier, was inside the ball of darkness) and the "Digimon world" was only one connected with the different digimon universe Maybe the first digi-destined have as digimons the royal knight, and the enemy was the seven demon kings and in the final battle...they sacrifice themselves to stop Lucemon and his demon kings. When Lucemon is the only one to defeat and the only royal knights alive are a tired Alphamon, a terminal Omegamon, Dynasmon and Lord Knightmon. Lucemon invoques his "pet" and fight against the four Knights, the battle starts to "destroy" the digimon world and, in the conclusion, Alphamon combine his power with the digivices to "seal" Lucemon, but Alphamon is too tired to make it and Lucemon resist, so Dynasmon and Lord Knightmon sacrifice themselves to be sealed with Lucemon. they make it and the evil is destroyed. but the digimon world is in chaos and is near destruction, so Alphamon and omegamon use his power, once again, with the help of the digi-destined, to divide the digimon world, separate them and connect them, every one with one of the Human world's. But Omegamon is too much power and he can't be still alive, so he have to say "good-bye". the peace like to have returned. But Akphamon has one last task to done, he use all te power left to send back the children's home, but also separate the digi-vice's power and call his death-partners to create his digi-eggs, the "symbols" and send them to all the digimon's world. That way, if Lucemon or any of the seven demon king's return, there will be new digi-destined to protect them. with all done, the legendary champion of the digimon world's soul can, finally, rest...waiting to be called once again. The frontier's arc happen because Seraphimon and Ophanimon called them, not for Alphamon's "call".
 * Seraphimon, Ophanimon and Cherubimon where alphamon's students.
 * Dynasmon and Lord Knightmon were corrupted be Lucemon.
 * The REAL royal knight's has his real form sealed in some kind of weapon or artifact, as seen with Gallantmon.
 * The REAL seven demon king's has his real form sleepde at effect of Alphamon's seal.
 * Frontier's Lucemon is the REAL Lucemon
 * Impmon/Belzemon of Tamer's the REAL Belzemon, butredempted.

Mimi is an ingenious Troll.
At least in the American dub, most of her behavior and lines seem specifically designed to get a reaction out of everybody else. She's also shown herself to be quite intelligent when she puts her mind to it, showing that she can be worthy of the Crest of Sincerity...she just chooses not to.

Digimon are Pokemon participating in a MMORPG while inside their balls
Pokemon are canonically energy beings that can be turned into information. The Digimon world allows Pokemon to experience the feeling of evolution without actually gaining the required levels.
 * This Troper lold at this comment before he went mad from the implications that ensued. He considered for a moment a Mega Crossover of Pokémon, Digimon, Tron themes and The Matrix. True Art Is Incomprehensible. At least he hopes so...

Digimon World Dawn & Dusk are, literally, games, and not of the MMO variety.
During the game, the Big Bad uses data-erasing waves that fully degenerate digimon and brainwash humans several times, but these somehow don't work with the main character and his digimon. Later on, the Big Bad starts addressing the main character as the "Real Being". In the final battle, he tries to erase the main character, just to see that his attack doesn't do anything to him/her. Yet, nobody even bothers wondering why. This explains why nobody does anything to stop the Big Bad and why you are not affected by his attacks: all the other digimon and characters in the game are, in fact, computer-controlled data, while you are supposed to do everything and have a Plot Armor to do so.

Somewhere down the line, there will be a Crisis Crossover
Since by its very nature there are multiple universes, a multidimmensional threat could be used to bring the different canons together to combat it. They could also use this to fix some plot holes and let some of the people who are from worlds were they never met their Digimon partners again. Come on, you know it'd be great!
 * V-Tamer 01 and The Wonder Swan games already had crossovers so it would not be impossible, if crisis crossovers happened they'd each have to be involved in at least one.

Millenniummon isn't technically Ryo's partner.
It seems odd that a Digimon who not only is a Jogress, but also contains a hodgepodge of other Digimon created by a human in an unorthodox way (I hesitate to say artificial, considering all Digimon are technically artificial) as one of its parts would have a destined partner. As such, Ryo's partner is actually Devimon. Half of Millenniummon is Kimeramon/Chimairamon, who was made with Devimon's data that Ken found in the ocean.

The human world in all series is one and the same!
...But the digital world is differing - It is split in 2 set digital worlds made of 2 opposing quadrants each, rotating on its axis at a different rate to the human world, and the humans go to the side that is closest to the human world at the time, eg, enter east and west world, but are in the western quadrent due to it being closer, but can go to eastern side if they have enough supplies and/or time to go that far. The timeline (focusing on the anime) goes something like this:

- Tamers - Evidently South and North-split digital world from Ebonwonmon and Zhuquiomon's appearance, most likely all takes place in the North side - this digital world is currently in 6 layers.

-After the final battle, the sovereigns are power drained from fighting so long, and Azulongmon and Baihumon go back to their world. HOWEVER...

- X-evolution Yggdrasil defeats and seals away the sovereigns in their weakened state, and unleashes hell with the X-virus. - he merges the layers in 2 sets of 3, leaving 3 merged layers. But somehow...

-The two digital worlds become temporarily merged after the end of X-evolution, the digital world becoming whole for once, and the normal digimon begin hunting down the x-digimon, whom generally go into hiding, for unknown reasons, leading to:

- Xros Wars - The world is in turmoil, and the battles have lead to the digital world being split into 108 pieces until all digimon can come under one leader, what better time for bad guys unleash evil plans? Baguramon begins to take over this world. Also, due to the unstable nature of the combined digital world, digivolution has become nigh-impossible, and the power of digixrossing is turned to as a substitute. After the events of this series, the digital world becomes 2 separate worlds again, with the sovereigns now only sealed away due to some kind of a power-down lock done by Baguramon and the fact that the world has forgotten them.

- Data Squad/Savers - In the meantime of Xros Wars, Hypnos' work has lead to the rise of DATS, whom we KNOW to have memory-erasers, need I say more about why humans don't remember a certain rampaging red blob? It's only years after Xros Wars that the human crew gained technology to go to the digital world, and started exploring the E-W world, starting point at West.

- Adventure - E-W world, starting point at East. Quite a bit of technology went haywire and shut down due to the events of Data Squad, leading to digital equipment becoming rare until it it is back in mass-production. The 7 child heroes traverse across the digital world, the crests power is digivolving-made-easy technology recently developed, and the partner digimon, as test subjects, would have, had all gone to plan, have been able to digivolve freely on their own using the crests.

- Adventure 02 - The sovereigns were released from being sealed away, due to the crest power being redirected to them. The 02 story happened exactly as we saw it, however, I'm going to take a guess and say that the ending wasn't the real one.

- Frontier - Few years after 02, no-one knows about digital world apart from the digidestined and a few others. The Frontier team goes to the N-S world, which was most affected by Xros Wars.

Questions anyone?


 * Not saying that the theory isn't workable, but there are several problems with it, namely the shear amount of times entire worlds have forgotten things, especially the D-Reaper (no seriously, how would Dats delete the memories of billions of people? The D-Reaper was a planet wide menace. 2º, even if somehow technology did regress, how would you explain the year going back and forwards? (Note that reference to dates are scattered through all seasons, even in the english version). In conclusion, you would be hard pressed to successfully join all the real worlds into one (note that only some digital and/or digital worlds are compatible). And that is without counting with the different ways each universe works.
 * Hell, most universe's canon directly contradicts each other's canon. In the Adventure series, Frontier and Savers, it's never stated where the digital world came from, only that it exists alongside the human world. In Tamers, it was created by a bunch of college students and eventually made into a popular franchise for kids. In Xros Wars, Wisemon tells Taiki that the digital world has actually existed longer than the human world, and humanity has only recently accessed a small part of it. So yeah, most seasons are mutually exclusive to each other.

The Digimon multiverse is pie-shaped.
Yes, this is a serious WMG. You could also compare it to the division of the universe into sectors in Green Lantern. But each universe (individual anime, manga, games, etc) is a different slice/sector, meeting precisely in the middle (which is where Huanglongmon has been patiently waiting to make his appearance ever since the series began). And each individual slice of this confectionary masterpiece has it's own delicious layers, as Izzy showed us back during 02. So characters like Ryo, who cross over into other universes, are going through either the middle or jumping into the next universe over, while the Dark Ocean in 02 and the Zones in Xros Wars are merely more delicious layers stuffed between the human and digital world crusts.

The digital world is the same, but reboots itself on occasion
Which is why some digimon can hop through digital worlds; they just have to go back in time to before a reboot(or forward to after one).

Masaru is an Alternate Universe version of Linkara
. How many other people do you know who are able to successfully punch out entities larger and presumably more powerful than themselves by yelling about their manliness at the top of their lungs? "Masaru: You want reality Mercurimon? Reality is: You are a digimon. I AM A MAN!"

Every season is in the same exact universe, with no alternate dimensions aside from the Digital World, DigiQuartz, Dark Ocean, and Dream World. Also, every movie is canon.
Here's how this works: Tamers' backstory of the Digital World is correct. Adventure established that people who catch a glimpse of the Digital World become Digidestined. It is completely ridiculous to think that only the first eight Digidestined saw that stuff in the original Digimon Adventure movie. It turns out that it was broadcast on TV, and tapes of recordings of the event got circulated around the world, creating Willis, Thomas, Zoe, and others. In the intervening years between the Adventure movie and the Adventure series, Digimon Frontier happens. Because of the severely compressed time of the Digital World, the couple of years between Frontier and Adventure in the real world are actually eons in the Digital World, and so the Frontier kids become ancient legends in Adventure.

During Adventure, Zoe begins writing a pilot to a show based on her adventures in the Digital World. Later, she goes on a vacation to Hawaii with her family, and meets Mimi there. The two discover their shared experience, and Mimi helps Zoe write Digimon, which later gets published, and the Digimon Tamers kids become big fans of it. After Adventure, the time of the Digital and real worlds become synced up. In the time between Adventure and 02, Digimon Savers and Tamers happen. DATS is actually just a branch of Hypnos, and as such, they aren't told the full story of the Digital World. The reason why Digimon die in Tamers but not anywhere else is because the Digimon bio-emerging in Takato's area are from a part of the Digital World that is very, very far from the Village where digieggs show up, so most of the Digimon there don't actually know that they get reconfigured, and thus grew the ability to absorb the data before it disappears. The Tamers and Savers stories never cross over because they happen at very different parts of the Digital World, and their climactic arcs are both on such a large scale that they overshadow each other. In other words, Takato doesn't notice the Digital World crashing because he's focusing on the D-Reaper, and Marcus doesn't notice the D-Reaper because he's focusing on the Digital World crashing.

The events of Tamers & Savers are what allowed the Adventure kids to go back to the Digiworld to give up their crests, and also what allowed Tai to be in the Digiworld at the start of the first episode of Digimon Adventure 02. Tamers and Savers happened while the Adventure kids were in the Digital World returning their crests, and when they returned to the real world, the events of both had been covered up as a crazy movie stunt or terrorist attack or something (Like the first Adventure movie), and so Tai and the others were oblivious. The widespread acceptance of Digimon at the very end of Savers is not due to King Drasil; it's because of Myotismon.

Between the 02 epilogue and Xros Wars, the Digimon Savers movie happens (Older Than They Look is in full effect here). Basically, that movie tells the tale of the apocalypse. Argomon successfully killed just about everyone. Marcus and the other Digimon returned came to the real world to try and stop him, but they were too late, and in a moment of mourning, Marcus was tied up like Thomas and Yoshi. Marcus and Agumon eventually destroy Argomon, but the damage has already been done. The world is over. DATS spends its remaining days looking for survivors, but to no avail.

But there were survivors! Grouped together, the last people decide that the Digital World was the cause of all this trouble, and agree to forget about it. And thus, when Digimon Xros Wars rolls around, all is forgotten. Nobody knows for sure anymore whether the Digital or real world came first, so many just guess. The various cameo appearances of past Digidestined is the work of the Time-traveling boat guy.

Ryo is not a dimension-hopping badass, he's actually just been brainwashed by Millenniummom, and so he thinks he's changed dimensions. Taichi from V-Tamer 01 is actually just a clone of Taishi from Adventure. Any apparent cross-overs with 02 or Frontier on his part is actually a hallucination caused by the degradation of his brain due to the advanced internal aging of clones(or maybe he's just a cousin who got his clothing from the same sources).

The Digimon World is a specific paradise meant to be free of human interference, which is why V-Tamer Taichi's encounters with Davis and Ryo appeared to be crossovers, it is hard to enter the place without inside help. Parallelmon wasn't passing through parallel worlds, it was opening up wormholes, gathering energy to travel to parallel worlds! Babamon brought Taichi and Takuya to Witchelny(another Bandai V-pet Wizardmon is from). Parallelmon's reckless wormhole use caused a time paradox that let Taichi meet Davis and the paradox was fixed when Parallelmon was destroyed but the fix took time, long enough for Taichi to meet Ryo. Babamon was able to call heroes from different Digital World eras because Witchelny is magical.

The Adventure Digivice is based off of the Digivice 01, it was an attempt to enhance the up link feature by causing a permanent psychic link between a human and a Digimon. While this failed, the designers saw strong emotions between partners using it accelerated the evolution process, so they decided not to throw it out. The D3 is obviously the third in the line, created in dark ocean to store certain files(Digimentals, Control Spires) and also to broadcast to multiple partners(suppressing evolution, triggering Jogresses, the latter feature lost in the first Digivice 01 "upgrade". Meanwhile, the D-arc used in Tamers is when they finally got that psychic link working, explaining why Takato can do what he does. They also added a card swipe feature because the crest powers proved to not be as reliable as originally envisioned while Biomerging is the ultimate purpose of the psychic link.

Lord Whamon made the Digivice 01 of course and the Diginomes, the larval forms of Gennai's people, are the ones responsible for all the "upgrades" of dubious quality. The Digivice ic was an individual effort by Spencer Damon and the D-tector from Frontier is a case of Older Than They Think. Yggdrasil is a title given to "Queen Bee" Diginomes. Norun from Next and that thing at the end of Savers are further evidence of Gennai people being an intermediate stages in the species(like Digimon 'de-evolve'). The Yggdrasil of X-Evolution, D-Cyber and Savers are a line of successors while Next Yggdrasil is from a different colony. The X Digimon resulted from the arbitrator program, as it was designed to keep Yggdrasil in check.

C'mon Digimon takes place right before V-Tamer 01, "ancient types" are not as old as people think. Chronicles, and the non Ryo games can probably be ignored as in-universe merchandise or extensions of the show they were based on.
 * I thought of a way to put in the non-Ryo games in. The original Digimon World takes place in the very early days of the Digital World (that's why there are so few sapient Digimon, and only 7 species of humanoid ones (3 of which are recolors), and no mega digimon bar Machinedramon, who's the last boss in the game), and Milleniumon is infact the Machinedramon who served as the final boss of the game. Digimon World 2 is set just before Digimon Frontier, and the characters are freedom fighters working against Lucemon. Digimon World 3 is set between 02 and Tamers. The DS games are after Savers.

Digimon naming convention is based on file extensions.
Specifically, every Digimon's data is stored in the digital world as a .mon file. Hence Angemon, Greymon, Impmon or truly: Ange.mon, Grey.mon, and Imp.mon.
 * Given this modes would be command line options for example Gallantmon Crimson Mode is actually Gallant.mon -Crimson.
 * If this were true, then it would also explain why the Digimon must call out the names of their attacks. For example, Angemon's "Hand of Fate" is either a separate program that is being run, or a method within their program that is being executed.
 * Note that even in digimon adventure (but especially in Tamers) didn't have to call their attacks (the dub actually added some screams that weren't originally to make everything consistent), they did it as more of a Kiai type of scream than anything.

The Royal Knights are the 12 signs of the Western Zodiac, plus Serpentarius.
Well, Dynasmon has a bull-like head and big strength(Taurus), Omegamon is a fusion and has a relation of duality with Alphamon(Gemini), Duftmon has a mane and a Leopard Mode(Leo), Lord Knightmon has a pink armor and an attack mentioning a goddess(Virgo), Examon has a scorpion-like tail and the ability to inject virus in their opponents(Scorpio), Sleipmon is a centaur archer(Sagittarius) and Dukemon has a fish-like head(Pisces).
 * Dukemon's helmet is based on Guilmon, and therefore probably not intended to be fishlike. And while I can see AlforceVeedramon being Capricorn because of the horns, what about Alphamon, Magnamon, and Craniummon?

Originally, Belzeebumon was intended as the Demon of Anger and Leviamon was intended as the Demon of Gluttony
Well, half of the group is not named after one of the seven princes of hell- and, if they only cared/discovered about their "official" sins after put the last of the "outsiders" in the group, not exists any reason to Belzebumon be planned as the Demon of Gluttony and Leviamon as the Demon of Envy. Beyond this, let's be frank, Belzebumon remembers a representation of Anger and Leviamon remembers a representation of Gluttony.

Lucemon will attain two adult forms.
One as in the "champion level" that comes after rookie(or child) and adult after larva stage(which would be super ultimate/super mega, Satan/Shadow Lord being a pupa). His rival Susanoomon, will probably get a new form to match it, probably a burst mode or digixross but not before Lucemon has his revenge on Grandracmon.