You asked some things there I thought we already cleared up, but skimming back I see it's not so clear. I'll try to cover everything clearly this time just to make sure there's no confusion left.
Greg said that they collected the nobles for the Turaga? That makes very little sense
I agree, but Greg didn't seem to agree. What he said actually at the time (this was a long time ago, he might have retconned it, not sure) was "only". I say "primarily" because some sources did show them using them. Either way, the Komau on Pohatu's face is still a problem since no other source says they collected two of each village's Turaga's main masks, and Onewa still has the Komau on his own face.
Greg's reasoning was that Great Masks are more powerful than Nobles, so a Toa wouldn't want a Noble. As I've pointed out often before, this ignores that even a weaker mask can fit better to a situation than the wrong power, so, scenes like Onua using Noble Telekinesis should make sense. But Greg didn't see it that way.
If Pohatu had used any other Noble mask it shouldn't really be an issue. Even though they collected the Nobles (according to Greg) for the Turaga only, they would still apparently be on the same Suva (only one Suva per village, I guess), so if the Toa changed their minds in a tricky situation and did call on one as a last resort it would work. But not with the same mask still being on the elder's face.
But that expands my question. Does the Golden Mask shapeshift itself or was it swapping with the suva, whereby all the masks (at least the Great ones) are golden on their Suva?
With Great Masks, it was not Suva-swapping. The shapechanging is what we don't know whether it's canon. The alternative is that they keep that Toa's normal face shape, but use a different power. The latter seems more likely but it's easy to see why it would confuse fans watching an online animation, so the animators can be given that artistic license.
If they used Noble Masks while normally wearing the Golden masks, though, it was definitely swapping with the Turaga's on the Suva. The part where the Komau keeps the golden color from the previous mask on his face is definitely non-canon. The problem there is that there shouldn't be a Komau on his face at all, or if there was, Onewa's mask should have switched to a different Noble. Make sense?
That said, did they ever use noble masks in the comics?
That would be easy to check -- there were only so many comics. I don't recall offhand but I doubt it. They were used several times in the MNOG/updates. (Books, I don't recall either, and that would be much harder to check.)
So would they still have access to Noble ones or just the Great ones through the Golden Kanohi power? that's my main question.
No -- the Golden Masks only gave access to the six Great powers.
One could hypothetically be made that would have multiple Noble powers, methinks, but that was not the case in the 2001 canon.
Edited by bonesiii, Jun 24 2014 - 10:26 PM.