There's so much we don't know about certain characters in the KH universe. Yen Sid and the 6th Apprentice are both examples of that. My theory is that they are one and the same.

To start off, we will have to prove a couple of things:
- Xehanort's keyblade used to belong to the 6th Apprentice.
- The 6th Apprentice/Yen Sid carries a Tome of Prophecies.

The Keyblade
Each Foreteller symbolised an animal. This carried over to their keyblades where we see these animals heads' on the hilt of each of them.

 

As seen above, not only do the 5 Forteller Keyblades show the symbolism, but Xehanort's shows it as well. I could go a bit more in depth into what each animal represents but that's not needed for this theory. So let us continue. Since we know there were 6 Apprentices, but only 5 Foretellers we can determine that Xehanort's keyblade most likely belongs to the unchosen Apprentice.

So how did that keyblade end up in The Land of Departure you ask? I will get to that after I have proven Yen Sid has a Tome of Prophecies.

Tome of Prophecies
So what is a Tome of Prophecies? A Tome of Prophecies contains all the destinies that the future may hold and the ones that the past held. If someone had one of these and knew what was meant to happen, they could easily manipulate the timeline to change it.

We also know that the 6 Apprentices were trained by the Master of Masters (whose identity is also unknown) but only 5 were gifted a Tome of Prophecies, so we'll assume the 6th Apprentice was not worthy. Perhaps he was unworthy because he wished to start a Keyblade War (a war which we know occured by evidence of The Keyblade Graveyard and that possibly ended the lives of at least 1 Foreteller, leaving behind a Tome). This could easily be snatched up by anybody, including the 6th Apprentice, and used to change the future by interfering with peoples' destinies. 



So now we've shown how the 6th Apprentice may have obtained a Tome, so onto Yen Sid.

Yen Sid has a large, mysterious book on his table most of the time and this has raised speculation as to be one of the Tome of Prophecies, but we've never known for sure. He knows all of this information about Nobodies, Heartless and even Xehanort. Mickey said something in Dream Drop Distance that helps show Yen Sid has a Tome.
"You changed the destinies of three of my friends!"
Mickey says that to Xehanort when he discovers he is still alive, but how would Mickey know that his friends' destinies did not come true? He has to have seen or been told about a Tome of Prophecies and since Yen Sid is his master, perhaps that's how he knows. Maybe Yen Sid told Mickey that Xehanort was changing the future, after the events of Birth by Sleep. 



So there, Yen Sid most likely has a Tome in his possesion and it has been right under our noses this entire time.

Yen Sid is the 6th Apprentice
There, now we've shown that it's highly probable that Xehanort's keyblade belongs to the 6th Apprentice and that a Tome of Prophecies may be owned by both Yen Sid and the apprentice. Now I will show that these people are one in the same.

Let's say this 6th Apprentice's goal was to obtain the power from Kingdom Hearts by triggering a Keyblade War. To do this, he needs the X-Blade which is "created" when a pure light and a perfect darkness clash in battle. All he would need to do is manipulate someone into becoming a perfect darkness, as one of the Foretellers is probably a pure light. With all of the shadiness that goes down, we'll say that he chose Ursus for this task, but when the Keyblade War came around, he was not yet a perfect darkness and so the power of Kingdom Hearts remained hidden.

The apprentice did not give up though, he continued to search for whatever lies beyond Kingdom Hearts. All he could think of to do was to create a pure light and perfect darkness himself and so he raised two Keyblade Wielders; Eraqus and Xehanort. He manipulated both of them into being his pawns, Eraqus: The Pure Light, and Xehanort: The Perfect Darkness. This is why his Xehanort's keyblade could be seen hung up in The Land of Departure during the KH3 trailer from E3, because this is where his master, the 6th Apprentice put it. 

Now let us fast-forward to when Xehanort tried to start the Keyblade War with Ventus and Vanitas but failed. Eraqus said something that showed he knew Yen Sid, so maybe he is their master, he looks old enough doesn't he? Yen Sid probably just sat back and waited until Xehanort and Eraqus would clash and create the X-Blade, but that never happened. Instead Xehanort came up with his own plan to do just that and all Yen Sid would have to do was bide his time until the X-Blade unlocked Kingdom Hearts. Maybe that's the true reason Mickey knew to go to the Keyblade Graveyard. Yen Sid sent him there to make sure Xehanort would not steal the power for himself. But again, Kingdom Hearts remained locked but this time, the X-Blade shattered into 20 pieces; 13 dark and 7 light.

Fast-forward to when Sora first met Yen Sid. At this point Yen Sid would know that Sora was a hero and he definitley that he was a Keyblade Wielder. We know that those 20 pieces are the Seekers of Darkness and the Guardians of Light, so this would be the point where Yen Sid would formulate the plan to manipulate these Guardians into fighting the Seekers, creating the X-Blade and unlocking Kingdom Hearts.

Yen Sid could be the 6^th Foreteller, the man in the black coat trying to take the power of Kingdom Hearts for himself. Eraqus did point out in Birth By Sleep that he knew Yen Sid. Xehanort having that keyblade would also explain why Yen Sid never materialises his, it was stolen.

Of course, most of this is pure speculation and not to be taken as fact but I do see a likelihood of this happening. If not, Yen Sid's probably the Master of Masters, but that's a theory for another day!

In the meantime, if you haven't already, you should check out the Rebirth Theory. Although it contradicts mine, it's a very well thought-out theory in its own right.

 

EDIT

 

Nevermind, just found something that disproves my theory myself. In the new trailer, the man in the black coat (who a lot of us believe to be th 6th apprentice) said: "Darkness will prevail, and light expire". That's exactly what happened at the end of the first Keyblade War, Kingdom Hearts fell to darkness, he got what he wanted so he's probably dead/gone at this stage.

 

But I would still like someone to show me where it's stated that Yen Sid's keyblade is the Star Seeker.

Edited June 9, 20169 yr by Zekrofire

This... actually makes sense. I mean, it took me a while to read all of it, but i think it's a really good theory.

Only problem is Yen Sid is actively trying to prevent the Keyblade War. Also we've seen Yen Sid's Keyblade (Star Seeker) in Birth By Sleep, it was the Keyblade that Mickey was using during his training. The sixth apprentice never got a tome(at least that we know of), I think it's more likely that he stole the last page of the Tome.

Nope. A Disney character isn't likely to be given that huge of a role. I realize that the Princesses of Heart were pretty significant as far as KH1's story went, but this is a member of a fellowship of all original Keyblade wielders, odds are the 6th is also an original character as well. This is much farther of a stretch, like if it was a physical stretch, you would have pulled something by now. It's been heavily suggested that Yen Sid was a peer to Eraqus and Xehanort, so I don't think what you are suggesting can work. That book need not necessarily be a book of prophesies either, it's just giving very vague advice that can be interpreted as a summation of KH1, CoM, and KH2. The Book of Prophesies is supposed to be a little more forward with telling you what's going to happen, it doesn't tell you everything, but it's still telling you of specific events as opposed to vague statements about journeys and trusting yourself and whatnot. If anything that guy in the black coat who keeps appearing in X is more likely to be the 6th apprentice than anyone else, especially after seeing how he interacts with the other Foretellers in the dream and in the trailer.

Yen Sid is actively trying to assemble the team that is supposed to stop Xehanort and the keyblade war though... He is even teaching Lea and Kairi how to wield a keyblade and trying to make Riku and Sora a master

This is extremely valid dude. Well done. I actually didn't notice the animal head thing before. 

I'm sorry, but Yen Sid would never be the 6th apprentice. That would mean Yen Sid would have to be, let's say at least 1000 years old since the Keyblade War took place in ancient times. 

 

The 6th apprentice is most likely whoever happens to be Young Xehanort and Young Eraqus' master is as the Goat headed Keyblade is held in the room where YX and YE are, and that Keyblade is then, like a will passed down, passed down to YX.

the problem with this, is only Ava's underlings lived past the keyblade war and were told not to fight. So yen sid can't be the 6th apprentice because he would be dead from the war. Also the 6th foreteller is accused of being influenced by darkness, which you would need to have the ancient key since it's a dark keyblade. he might have just been chosen to keep the book of prophecies by his master.

There's so much we don't know about certain characters in the KH universe. Yen Sid and the 6th Apprentice are both examples of that. My theory is that they are one and the same.

 

To start off, we will have to prove a couple of things:

- Xehanort's keyblade used to belong to the 6th Apprentice.

- The 6th Apprentice/Yen Sid carries a Tome of Prophecies.

 

The Keyblade

Each Foreteller symbolised an animal. This carried over to their keyblades where we see these animals heads' on the hilt of each of them.

 

 

As seen above, not only do the 5 Forteller Keyblades show the symbolism, but Xehanort's shows it as well. I could go a bit more in depth into what each animal represents but that's not needed for this theory. So let us continue. Since we know there were 6 Apprentices, but only 5 Foretellers we can determine that Xehanort's keyblade most likely belongs to the unchosen Apprentice.

 

So how did that keyblade end up in The Land of Departure you ask? I will get to that after I have proven Yen Sid has a Tome of Prophecies.

 

Tome of Prophecies

So what is a Tome of Prophecies? A Tome of Prophecies contains all the destinies that the future may hold and the ones that the past held. If someone had one of these and knew what was meant to happen, they could easily manipulate the timeline to change it.

 

We also know that the 6 Apprentices were trained by the Master of Masters (whose identity is also unknown) but only 5 were gifted a Tome of Prophecies, so we'll assume the 6th Apprentice was not worthy. Perhaps he was unworthy because he wished to start a Keyblade War (a war which we know occured by evidence of The Keyblade Graveyard and that possibly ended the lives of at least 1 Foreteller, leaving behind a Tome). This could easily be snatched up by anybody, including the 6th Apprentice, and used to change the future by interfering with peoples' destinies. 

 

 

So now we've shown how the 6th Apprentice may have obtained a Tome, so onto Yen Sid.

 

Yen Sid has a large, mysterious book on his table most of the time and this has raised speculation as to be one of the Tome of Prophecies, but we've never known for sure. He knows all of this information about Nobodies, Heartless and even Xehanort. Mickey said something in Dream Drop Distance that helps show Yen Sid has a Tome.

"You changed the destinies of three of my friends!"

Mickey says that to Xehanort when he discovers he is still alive, but how would Mickey know that his friends' destinies did not come true? He has to have seen or been told about a Tome of Prophecies and since Yen Sid is his master, perhaps that's how he knows. Maybe Yen Sid told Mickey that Xehanort was changing the future, after the events of Birth by Sleep. 

 

 

So there, Yen Sid most likely has a Tome in his possesion and it has been right under our noses this entire time.

 

Yen Sid is the 6th Apprentice

There, now we've shown that it's highly probable that Xehanort's keyblade belongs to the 6th Apprentice and that a Tome of Prophecies may be owned by both Yen Sid and the apprentice. Now I will show that these people are one in the same.

 

Let's say this 6th Apprentice's goal was to obtain the power from Kingdom Hearts by triggering a Keyblade War. To do this, he needs the X-Blade which is "created" when a pure light and a perfect darkness clash in battle. All he would need to do is manipulate someone into becoming a perfect darkness, as one of the Foretellers is probably a pure light. With all of the shadiness that goes down, we'll say that he chose Ursus for this task, but when the Keyblade War came around, he was not yet a perfect darkness and so the power of Kingdom Hearts remained hidden.

 

The apprentice did not give up though, he continued to search for whatever lies beyond Kingdom Hearts. All he could think of to do was to create a pure light and perfect darkness himself and so he raised two Keyblade Wielders; Eraqus and Xehanort. He manipulated both of them into being his pawns, Eraqus: The Pure Light, and Xehanort: The Perfect Darkness. This is why his Xehanort's keyblade could be seen hung up in The Land of Departure during the KH3 trailer from E3, because this is where his master, the 6th Apprentice put it. 

 

Now let us fast-forward to when Xehanort tried to start the Keyblade War with Ventus and Vanitas but failed. Eraqus said something that showed he knew Yen Sid, so maybe he is their master, he looks old enough doesn't he? Yen Sid probably just sat back and waited until Xehanort and Eraqus would clash and create the X-Blade, but that never happened. Instead Xehanort came up with his own plan to do just that and all Yen Sid would have to do was bide his time until the X-Blade unlocked Kingdom Hearts. Maybe that's the true reason Mickey knew to go to the Keyblade Graveyard. Yen Sid sent him there to make sure Xehanort would not steal the power for himself. But again, Kingdom Hearts remained locked but this time, the X-Blade shattered into 20 pieces; 13 dark and 7 light.

 

Fast-forward to when Sora first met Yen Sid. At this point Yen Sid would know that Sora was a hero and he definitley that he was a Keyblade Wielder. We know that those 20 pieces are the Seekers of Darkness and the Guardians of Light, so this would be the point where Yen Sid would formulate the plan to manipulate these Guardians into fighting the Seekers, creating the X-Blade and unlocking Kingdom Hearts.

 

Yen Sid could be the 6^th Foreteller, the man in the black coat trying to take the power of Kingdom Hearts for himself. Eraqus did point out in Birth By Sleep that he knew Yen Sid. Xehanort having that keyblade would also explain why Yen Sid never materialises his, it was stolen.

 

Of course, most of this is pure speculation and not to be taken as fact but I do see a likelihood of this happening. If not, Yen Sid's probably the Master of Masters, but that's a theory for another day!

 

In the meantime, if you haven't already, you should check out the Rebirth Theory. Although it contradicts mine, it's a very well thought-out theYory in its own right.

Disney would never let this happen. Yen Sid is a good guy, it's been established man. How is this possible? The time of the foretellers was at least 100+ years before the current KH timeline, Yen Sid would be dead. And the argument that Disney characters don't age won't work because we saw Hercules grow from BBS to KH1.

 

Xehanort is NOT the perfect darkness, he isn't obsessed with darkness at all. He seeks the balance of light and darkness like he's said many times before. Xehanort hates the 'Tyranny of Light'.

 

Also, why is Yen Sid helping Riku and Sora stop Xehanort then?

 

Yen Sid has been trying to prevent the Keyblade War, if he wanted to take Kingdom Hearts for himself, why wouldn't he just go along with the war so that Kingdom Hearts would appear and thus he could sneak up and steal it for himself.

 

Oh and btw, Yen Sid confirmed that he trained at the same time or possibly alongside Eraqus and Young Xehanort.

SKIP TO 7:11 where Jared shows the screenshot of Yen Sid saying

"There was a time when I walked the path of the Keyblade Master alongside Eraqus and Xehanort"

 

So there's solid evidence he's not the 6th foreteller. Why would he have any reason to take Kingdom Hearts for himself? He's just a simple Disney property and mentor to the heroes.

 

 

Edited June 9, 20169 yr by Shinobi Palace

Only problem is Yen Sid is actively trying to prevent the Keyblade War. Also we've seen Yen Sid's Keyblade (Star Seeker) in Birth By Sleep, it was the Keyblade that Mickey was using during his training. The sixth apprentice never got a tome(at least that we know of), I think it's more likely that he stole the last page of the Tome.

Yen Sid's not trying to prevent the war specifically, just getting together the Guardians to stop the Seekers. The Star Seeker isn't Yen Sid's keyblade I'm pretty sure, just Mickey's training one. Lastly I said that the 6th apprentice could have stolen a tome.

Disney would never let this happen. Yen Sid is a good guy, it's been established man. How is this even possible? The time of the foretellers was at least 100+ years before the current KH timeline, Yen Sid would be dead. And the argument that Disney characters don't age won't work because we saw Hercules grow from BBS to KH1.

Nomura has stated that Disney don't have much say in what happens with the game's characters. Yen Sid would not necessarily be dead, he could have bided his time in the Realm of Darkness (time flows differently there as seen by Aqua).

Nope. A Disney character isn't likely to be given that huge of a role. I realize that the Princesses of Heart were pretty significant as far as KH1's story went, but this is a member of a fellowship of all original Keyblade wielders, odds are the 6th is also an original character as well. This is much farther of a stretch, like if it was a physical stretch, you would have pulled something by now. It's been heavily suggested that Yen Sid was a peer to Eraqus and Xehanort, so I don't think what you are suggesting can work. That book need not necessarily be a book of prophesies either, it's just giving very vague advice that can be interpreted as a summation of KH1, CoM, and KH2. The Book of Prophesies is supposed to be a little more forward with telling you what's going to happen, it doesn't tell you everything, but it's still telling you of specific events as opposed to vague statements about journeys and trusting yourself and whatnot. If anything that guy in the black coat who keeps appearing in X is more likely to be the 6th apprentice than anyone else, especially after seeing how he interacts with the other Foretellers in the dream and in the trailer.

When I was talking about the 6th apprentice, I was talking about that guy in the black coat. Also, as I said, Yen Sid could be manipulating all of them, in which case, he could have lied about saying he was Eraqus and Xehanort's peer. 

There's so much we don't know about certain characters in the KH universe. Yen Sid and the 6th Apprentice are both examples of that. My theory is that they are one and the same.

 

To start off, we will have to prove a couple of things:

- Xehanort's keyblade used to belong to the 6th Apprentice.

- The 6th Apprentice/Yen Sid carries a Tome of Prophecies.

 

The Keyblade

Each Foreteller symbolised an animal. This carried over to their keyblades where we see these animals heads' on the hilt of each of them.

 

 

As seen above, not only do the 5 Forteller Keyblades show the symbolism, but Xehanort's shows it as well. I could go a bit more in depth into what each animal represents but that's not needed for this theory. So let us continue. Since we know there were 6 Apprentices, but only 5 Foretellers we can determine that Xehanort's keyblade most likely belongs to the unchosen Apprentice.

 

So how did that keyblade end up in The Land of Departure you ask? I will get to that after I have proven Yen Sid has a Tome of Prophecies.

 

Tome of Prophecies

So what is a Tome of Prophecies? A Tome of Prophecies contains all the destinies that the future may hold and the ones that the past held. If someone had one of these and knew what was meant to happen, they could easily manipulate the timeline to change it.

 

We also know that the 6 Apprentices were trained by the Master of Masters (whose identity is also unknown) but only 5 were gifted a Tome of Prophecies, so we'll assume the 6th Apprentice was not worthy. Perhaps he was unworthy because he wished to start a Keyblade War (a war which we know occured by evidence of The Keyblade Graveyard and that possibly ended the lives of at least 1 Foreteller, leaving behind a Tome). This could easily be snatched up by anybody, including the 6th Apprentice, and used to change the future by interfering with peoples' destinies. 

 

 

So now we've shown how the 6th Apprentice may have obtained a Tome, so onto Yen Sid.

 

Yen Sid has a large, mysterious book on his table most of the time and this has raised speculation as to be one of the Tome of Prophecies, but we've never known for sure. He knows all of this information about Nobodies, Heartless and even Xehanort. Mickey said something in Dream Drop Distance that helps show Yen Sid has a Tome.

"You changed the destinies of three of my friends!"

Mickey says that to Xehanort when he discovers he is still alive, but how would Mickey know that his friends' destinies did not come true? He has to have seen or been told about a Tome of Prophecies and since Yen Sid is his master, perhaps that's how he knows. Maybe Yen Sid told Mickey that Xehanort was changing the future, after the events of Birth by Sleep. 

 

 

So there, Yen Sid most likely has a Tome in his possesion and it has been right under our noses this entire time.

 

Yen Sid is the 6th Apprentice

There, now we've shown that it's highly probable that Xehanort's keyblade belongs to the 6th Apprentice and that a Tome of Prophecies may be owned by both Yen Sid and the apprentice. Now I will show that these people are one in the same.

 

Let's say this 6th Apprentice's goal was to obtain the power from Kingdom Hearts by triggering a Keyblade War. To do this, he needs the X-Blade which is "created" when a pure light and a perfect darkness clash in battle. All he would need to do is manipulate someone into becoming a perfect darkness, as one of the Foretellers is probably a pure light. With all of the shadiness that goes down, we'll say that he chose Ursus for this task, but when the Keyblade War came around, he was not yet a perfect darkness and so the power of Kingdom Hearts remained hidden.

 

The apprentice did not give up though, he continued to search for whatever lies beyond Kingdom Hearts. All he could think of to do was to create a pure light and perfect darkness himself and so he raised two Keyblade Wielders; Eraqus and Xehanort. He manipulated both of them into being his pawns, Eraqus: The Pure Light, and Xehanort: The Perfect Darkness. This is why his Xehanort's keyblade could be seen hung up in The Land of Departure during the KH3 trailer from E3, because this is where his master, the 6th Apprentice put it. 

 

Now let us fast-forward to when Xehanort tried to start the Keyblade War with Ventus and Vanitas but failed. Eraqus said something that showed he knew Yen Sid, so maybe he is their master, he looks old enough doesn't he? Yen Sid probably just sat back and waited until Xehanort and Eraqus would clash and create the X-Blade, but that never happened. Instead Xehanort came up with his own plan to do just that and all Yen Sid would have to do was bide his time until the X-Blade unlocked Kingdom Hearts. Maybe that's the true reason Mickey knew to go to the Keyblade Graveyard. Yen Sid sent him there to make sure Xehanort would not steal the power for himself. But again, Kingdom Hearts remained locked but this time, the X-Blade shattered into 20 pieces; 13 dark and 7 light.

 

Fast-forward to when Sora first met Yen Sid. At this point Yen Sid would know that Sora was a hero and he definitley that he was a Keyblade Wielder. We know that those 20 pieces are the Seekers of Darkness and the Guardians of Light, so this would be the point where Yen Sid would formulate the plan to manipulate these Guardians into fighting the Seekers, creating the X-Blade and unlocking Kingdom Hearts.

 

Yen Sid could be the 6^th Foreteller, the man in the black coat trying to take the power of Kingdom Hearts for himself. Eraqus did point out in Birth By Sleep that he knew Yen Sid. Xehanort having that keyblade would also explain why Yen Sid never materialises his, it was stolen.

 

Of course, most of this is pure speculation and not to be taken as fact but I do see a likelihood of this happening. If not, Yen Sid's probably the Master of Masters, but that's a theory for another day!

 

In the meantime, if you haven't already, you should check out the Rebirth Theory. Although it contradicts mine, it's a very well thought-out theory in its own right.

 

 

This... actually makes sense. I mean, it took me a while to read all of it, but i think it's a really good theory.

 

 

This is extremely valid dude. Well done. I actually didn't notice the animal head thing before. 

Mickey knew that their destinies were changed because he was there when it happened in BBS and Mickey probably stole the star shard again to go help his friends. Plus, Yin Sid keyblade is Star Seeker if I remember correctly. Yin Sid says" I had hoped, Xehanort, your heart would no longer lead you astray.", so he wouldn't want Xehanort to make the X-blade. Also, the X-blade was already shattered into 20 pieces before BBS, Xehanort's way of making it was like a jury rigged experiment. This is a nice theory but it's very loosely based.

What if Xehanort is being possessed by the black forteller keyblade. What if it possesses people who use it to carry out some diabolical plan like (for lack of a better example) the one ring from lord of the rings. I mean young Xehanort seemed pretty chill to me when he was having that chess match with Eraqus. Just a random thought. Probably not even plausible.

Mickey knew that their destinies were changed because he was there when it happened in BBS and Mickey probably stole the star shard again to go help his friends. Plus, Yin Sid keyblade is Star Seeker if I remember correctly. Yin Sid says" I had hoped, Xehanort, your heart would no longer lead you astray.", so he wouldn't want Xehanort to make the X-blade. Also, the X-blade was already shattered into 20 pieces before BBS, Xehanort's way of making it was like a jury rigged experiment. This is a nice theory but it's very loosely based.

Mickey wouldn't know if their destinies were changed just because he was there, he would need other knowledge as to what was meant to happen. Okay yeah the X-blade was already split into 20 pieces, but the theory would still stand. Also, can someone link me to where it's shown the Star Seeker is Yen Sid's keyblade? I honestly can't find that anywhere.

Mickey wouldn't know if their destinies were changed just because he was there, he would need other knowledge as to what was meant to happen. Okay yeah the X-blade was already split into 20 pieces, but the theory would still stand. Also, can someone link me to where it's shown the Star Seeker is Yen Sid's keyblade? I honestly can't find that anywhere.

I mean it would be obvious that Xehanort did it, Mickey either figured it out on his own after he was taken to Xehanort by Vanitus or he was told after he brought back Ven and Aqua by either Aqua or Yin Sid.

I mean it would be obvious that Xehanort did it, Mickey either figured it out on his own after he was taken to Xehanort by Vanitus or he was told after he brought back Ven and Aqua by either Aqua or Yin Sid.

Exactly my point, Yen Sid could have told him. This little bit adds to Yen Sid having a Tome but that doesn't mean that he definitely does, I said in the theory that he possibly has one.

Well IF this would be true, it would be such a WTF-moment in Kingdom Hearts III. That would be such a goood plottwist, but (sadly) i think that it is unlikely, reasons are in the other comments above^^But really good theory though

Edited June 9, 20169 yr by dodo laguro

Exactly my point, Yen Sid could have told him. This little bit adds to Yen Sid having a Tome but that doesn't mean that he definitely does, I said in the theory that he possibly has one.

No, Yin Sid would have know by Terra's, Aqua's, and Ven's visit. Also, when has Yin Sid shown that he has to power to see into the future.

Nope. A Disney character isn't likely to be given that huge of a role. I realize that the Princesses of Heart were pretty significant as far as KH1's story went, but this is a member of a fellowship of all original Keyblade wielders, odds are the 6th is also an original character as well. This is much farther of a stretch, like if it was a physical stretch, you would have pulled something by now. It's been heavily suggested that Yen Sid was a peer to Eraqus and Xehanort, so I don't think what you are suggesting can work. That book need not necessarily be a book of prophesies either, it's just giving very vague advice that can be interpreted as a summation of KH1, CoM, and KH2. The Book of Prophesies is supposed to be a little more forward with telling you what's going to happen, it doesn't tell you everything, but it's still telling you of specific events as opposed to vague statements about journeys and trusting yourself and whatnot. If anything that guy in the black coat who keeps appearing in X is more likely to be the 6th apprentice than anyone else, especially after seeing how he interacts with the other Foretellers in the dream and in the trailer.

 

Mickey Mouse is not only a King in the Kingdom Hearts Universe, but, he's also a confirmed Guardian of Light. That's more than huge if you ask me. I disagree with this theory entirely only because it discredits the integrity of what Yen Sid represents. Regardless, this theory was well though out. Kudos.

I know you've alrady dicarded this theory, but I have to say one thingThe x-blade, that is, the real one, the one that exists at the time of chi, was not created by the clash, but instead existed alongside Kingsdom Hearts "In ancient time people believed the light was a gift from an unseen land known as Kingdom Hearts. But kingdom hearts was safeguarded by it's counterpart, the x-blade" ~Master Xehanort, Kingdom hearts 3D Dream Drop Distance.

This, and the fact that keyblades where based on the x-blade, says that the x-blade existed well before the first Keyblade and thus, before any clash took place.However whiel Yen Sid may not be the 6th apprentice he may indeed have a Tome of Prophecy and, in fact, has already shown it to Sora,

Yen Sid's not trying to prevent the war specifically, just getting together the Guardians to stop the Seekers. The Star Seeker isn't Yen Sid's keyblade I'm pretty sure, just Mickey's training one. Lastly I said that the 6th apprentice could have stolen a tome.

Nomura has stated that Disney don't have much say in what happens with the game's characters. Yen Sid would not necessarily be dead, he could have bided his time in the Realm of Darkness (time flows differently there as seen by Aqua).

When I was talking about the 6th apprentice, I was talking about that guy in the black coat. Also, as I said, Yen Sid could be manipulating all of them, in which case, he could have lied about saying he was Eraqus and Xehanort's peer. 

That literally makes no sense given Yen Sid's character. He's a wise and otherworldy sorcerer, not another Xehanort. That only works if you're doing it as a joke.

Mickey Mouse is not only a King in the Kingdom Hearts Universe, but, he's also a confirmed Guardian of Light. That's more than huge if you ask me. I disagree with this theory entirely only because it discredits the integrity of what Yen Sid represents. Regardless, this theory was well though out. Kudos.

Let me clarify. A Disney character such as Yen Sid is unlikely to have the role of not only an antagonist, but also a manipulative catalyst that led to every single conflict the series is known for. Imagine if Nomura said it was either Mickey or Sephiroth that started the Keyblade War. That would be ridiculous. Characters like Donald and Cloud can serve strong supporting roles and characters like Mickey can even have a strong primary role, but it's pretty much par for the course that any character who causes a significant shift in events in the KH universe is usually, if not always, an original character made for the series. So if it isn't some other version of Xehanort manipulating events, it's probably someone else just as evil and manipulative never before seen. I never meant to say that a Disney character could never have an important role like what Mickey, Donald, or Goofy has, but what I am saying is that it is unlikely that they would ever have such a significant role that the whole point of the whole series revolves around what they did, and I would also apply that to any Square characters as well. They're there to help move things along that were already in motion, not set them up in the first place.