Brennan Johns

Only Pure forms of xehanort, the one that can use the keyblade can timetravel. and his older self was there in the future which is why he can go there. And in the first or second game they say that she went there with her grandmother. if it was just because of aqua then her Grandmother wouldn't have been there. It also could indirectly explain why namine and diz got along so well. Ansem can not time travel nor did her time travel. only Xehanort. Now theoretically He could have wen back in time right before 3d and told himself what to do and it all could have been set up right then because he could just hop through time and explain to himself at different ages what had to be done next all in a matter of moments really. I'm saying that heartless ansem and xemnas never time traveled at all.

Xemnas and ansem that are seen in 3D are not from the past they were reborn, this is evident because they already had experienced their battles with Sora which they momentarily refer to before various battles. Most of them were actually there, like the organization 13 members that were restored. Another way to prove this is that if they weren't restored then they couldn't have been present anyway because of the rules of time travel saying that you have to have existed there in order to get there. I dont think that Heartless Ansem or xemnas ever actually time travel because seemingly only keyblade users can do this. making only true forms of Xehanort able to do this. Keep in mind that for young xehanort won't remember anything that happened after he returns to the past so he wont know what happens when he is gone. only that he saw the older version of himself and that he had gone into the future... there really is no way for him to know that he succeeded in any way other than to keep living his life and figuring it out. so he hasn't even figured out yet how its all supposed to work out. And he didn't even know that it was an older version of himself that told him how to go into the future. As for Kairi, let's follow some basic logic. She is from Radiant Gardens. She lived in the Castle which is shown clearly in Kingdom Hearts 1 when Sora experiences a few of kairi's memories of her in the library, and of coarse in Birth by sleep when she is out front picking flowers. She also is one of the pure hearts which doesn't necessarily mean royalty however Ansem the Wise was their leader and at one point referred to as king ansem. Also the fact that she and her grandmother or nanny both made their way to the destiny Islands. no one else made it to the destiny Islands and the reason they did was because Ansem the Wise sent his daughter and her caretaker to escape the Heartless that were beginning to invade their world and were causing their world to fall into darkness. who else would have the ability to bridge the worlds in that way? Xehanort wouldn't have done it, and by the time it would have all started going down the Organization members were probably already changed.. or at least not having a good time... I'm not saying it's fact but it would be one hell of a coincidence...

Also the fact that Riku has been named a Keyblade master is no big deal because according to yen sid it just means that he has learned the ability to unlock sleeping hearts which must be the ability that designates a master. just like Master Aqua she was instructed on how to both lock and unlock a sleeping heart like in the case of Ventus. That is the only stock i take in the assignment of the title. I believe that Sora will be also deemed a Keyblade master along with Kairi right at the beginning of Kingdom Hearts 3 but during that time Riku will be given the assignment to retrieve Ventus' body. or something along those lines. And the other two will be charged with finding Aqua. I will say that the whole Lea with a keyblade thing threw me for a loop, i honestly thought he was kidding until he flicked his wrist and there it was... i thought it was a nice touch.

To better explain the format in which time travel is being used. Sora and Riku are not using time travel in the same way.(this is obvious because of when young Xehanort explains how time travel works , saying that you must have also been present at the time you go to and as an example they had never gone to the grid prior, they went to space paranoids which was the copy of the original grid which would make it a completely different world. or any of the other worlds to be honest.) Only the Xehanorts are. They have traveled time to the point in which they could also enter the dreams of Sora. Which required the time travel. However to Sora and riku these worlds are locked at a specific time so they move seamlessly into the worlds. Also, the castle seen that sora refers to is the castle in Radient Gardens and has the memory from Ventus. The reason that Maleficent is there is because she had taken the castle as her own as it was where the Heartless first emerged from the experiments carried out by Xehanort and Ansem the Wise. So it was the first world to be connected. And Subsequently that is how Kairi, Ansem's Daughter was taken to Destiny Islands to seek refuge from the darkness that swallowed up her home world.