we're talking about the xehanort in kh2 and the xehanort in bbsI think you people are really over-thinking this.I agree with Seraph. Designs for characters change, especially if you wanted to make the character look better. I wouldn't be surprised that Xehanort in KH2 has some subtle differences when compared to Xehanort in BBS since they wanted to improve from a game that should have been a lot better. Now with Terranort to Xehanort appearance, I would just say that both Terra and MX assimilated into Terra's body over that short period of time and changed the body's complexion.
we are talking about
terranort and his difference between xehanort the apprentice