Well, we don't really know if Xemnas assigned them to actually work there.
Yes we do, the Ansem Reports stated that those 6 Organization members were sent to the Castle Oblivion outpost of the Organization specifically by Xemnas
They could've chosen it themselves, OR they could've seeked Namine and forced her to create it after DI was consumed in KH1.
They were sent there on assignment
Yes, but you're saying she memorized it perfectly. I find that hard to believe, very hard.
Yet her creating an entire world from scratch, using a power that we have never seen her use or even hinted at possessing, is more likely? She likes to draw, she draws things she's never seen before (Look at her room in Twilight Town), she knows what the castle looks like and she drew it
She could've drawn it in Twilight Mansion, seeing as that is connected to TWTNW and all Nobodies are concieved there [I think] in the White Room.
If she was concieved in TWTNW, and I dont see where else she could've been seeing as DI was consumed by darkness when she was created.
Namine was conceived when Sora released Kairi's heart from within his at Hollow Bastion, she can manipulate Sora's heart and those connected to his heart due to Kairi's heart being within his for so long
None of this would give her the ability to just
create things
Seeing as it alters memories, it may be tied in with Namine and its purpose that has to be served, and was [altering Sora]. Without Namine, they wouldnt be able to completely manipulate Sora, or Marluxia wouldnt be able to do that. So I find it, again, hard to believe that CO was created previously, way back, as a planned plot.
The Castle itself does not alter the memories, Namine does. All the altering of memories was done by Namine herself, not the Castle.
Castle Oblivion was not 'created', it is a world just like Yen Sid's tower. The Organization claimed it as an outpost, and Xemnas sent 6 of the Organization members there for research. Marluxia captured Namine and used her for his own plot, not Xemnas', what's hard to understand?
I believe it stated in Wikipedia that CO is in 'the outskirts of TT', although it might've been in a message archive. Ill have to look for that...
Wikipedia can be edited by anyone, and is influenced by the opinions of the people who write on it