Posted 27 February 2012 - 03:00 AM
When he fought Sora, it show him using two keyblade against him.
If Roxas is connected with Sora heart, he would be using Sora keyblade.
So my theory is ,
I guess being a nobody of Sora give him the ablitity of using a Keyblade , and he is able to use a keyblade from Ventus.
Sora is able to use dual keyblade too, possibly by the fact of having Ventus heart.
BUT, let make things super interesting.
Roxas never use dual keyblade in 358 days, only after Xion death.
So I guess when Xion dies, she goes back into Roxas with a few adjustment, possibly by the fact where the replica have a real keyblade of some sort.
So, going back to Roxas, he is able to use dual keyblade. One from him, one from Xion.