My opinion about time travel is actually that, when you cast aside your body, both the body AND the heart can travel through time but with 1 important rule: One of those 2 ( body or heart) has to remain in the present so that paradox cannot occur. When ansem sod traveled back in time as a heart, his body remained in the present so the time was set in motion. After informing YMX (aka Trollanort ) about time travel, he went back in his time and then his body (only his body) went at kh 3d ( could go at that time assuming AX has been revived). Pretty much the same happened with Xemnas, but since xemnas didnt have a heart, when he cast aside his body he just managed to duplicate himself. so 1 of his body (his actual body) went at kh 3d time! So umm...... wth Oldnort does in kh 3d timeline? Well... i think that when oldnort extracted his heart from himself at end of bbs (terra s story) he cast aside his body! But he didnt leave his heart like that.. he forced it to Terra and then when he disappeared, i think he went to the future. So... empty bodies of xehanorts exist at kh 3d? I dont think so lol. AX split his heart into 13 pieces before gettin split into heartless and nobody. i guess those hearts went to those bodies (and to Isa and Braig making them bad ). So thats my opinion! No paradox right? what do you think?

it is also possible that different timelines creates different dimensions. they say that YMX is from "alternate" timeline. If different timelines forms different dimensions, then dark corridors can maybe used to world travel between these dimensions. Who knows?

you forgot one crucial point about Xemnas: he did manage to grow a heart..

you forgot one crucial point about Xemnas: he did manage to grow a heart..

 

you forgot one crucial point about Xemnas: he did manage to grow a heart..

 

yeah youre right... i didnt watch many kh 3d cutscenes, but apart from this everythin remains pretty much the same since his body in kh 3d ( if we follow my theory ) did not have a heart at first but got the 1/13 of AX heart

it is also possible that different timelines creates different dimensions. they say that YMX is from "alternate" timeline. If different timelines forms different dimensions, then dark corridors can maybe used to world travel between these dimensions. Who knows?

 

while this doesnt seem impossible, it is just too complicated because --> many time travels = many dimensions ---> MAAAANY xehanorts but Nomura is NOMURA so.. http://kh13.com/forum/public/style_emoticons/default/dry.png

yeah youre right... i didnt watch many kh 3d cutscenes, but apart from this everythin remains pretty much the same since his body in kh 3d ( if we follow my theory ) did not have a heart at first but got the 1/13 of AX heart

 

it does not have to do anything with it he has a part of MX's heart, it actually is doubtful if he and Ansem SoD needed a fragment of MX's heart

your statement is not legit since Axel, Roxas, Saïx, Xion, Xigbar all had grown a heart what Xemnas/MX only was waiting for because he knew they then would be a suiting vessel for a fragment of his heart

it does not have to do anything with it he has a part of MX's heart, it actually is doubtful if he and Ansem SoD needed a fragment of MX's heart

your statement is not legit since Axel, Roxas, Saïx, Xion, Xigbar all had grown a heart what Xemnas/MX only was waiting for because he knew they then would be a suiting vessel for a fragment of his heart

 

ok so we have Saix and Xigbar being 2 of the 13 darknesses ( or were they Isa and Braig..). They have hearts anyway (whether they are nobodies or smbodies)

I said that ansem sod and xemnas needed a fragment of MX heart because an empty body havin got to the future (from my theory) possibly needs a heart. Sod and xemnas from the present surely didnt need a fragment of his heart im sure. i guess kh 3d secret reports might reveal more time travel rules ( or explain it in more detail ). til then i dont know but ill keep this theory in mind ( only because it has some logic )