So I guess what I mean is one (or all, but I think it's at more one) of the RG could be stronger than Yama not accounting Zanpakuto abilities. So they might have greater reiatsu, an entirely different type of Zan ability. I suppose the question is whether being stronger than Yama makes you any less susceptible to the destructive powers of Ryujin Jakka. In the case of insane powers like transcendent Ichigo, probably, in the case of a Shinigami who happens to be a bit stronger, I don't know.
Did you actually read the part where Shunsui ADMITTED that 'someone had to be sacrificed' which is proof that the first four captains were risking themselves to learn their enemy's abilities.
The point I made before, and I will say it again with perfect confidence is that the four captains, INCLUDING BYAKUYA, would not have been DEFEATED if they stayed in shikai, although neither would they have won. They would have drawn...as is proven by the fact that the other three captains HELD THEIR OWN AFTER HAVING BANKAI STOLEN and Byakuya didn't lose to the enemy's power, BUT TO HIS OWN BANKAI.
There, was that more clear for you?
And he is right that no Shinigami has been born who was stronger than him. Aizen ceased being a Shinigami, and Ichigo isn't one.
As for how the Royal Guards are stronger than the entirety of the Gotei 13, I don't think it has anything to do with their natural abilities or Bankai's and what have you. I honestly think they were altered by the Soul King to have some kind of collective be all end all power than can obliterate everything. Because frankly, some of them aren't that old seeing as how they know current Gotei 13 members, meaning they aren't stronger than Yama, and none of the rest of them seem older than Yama. I also fail to see how without making even this manga absurd, all 5 of them could be around Yama's strength.
Aizen was a logical man, so, he chose the best path for himself, weakening Captain-Commander's hand by using Wonderweiss. He would definitely not bother to develop that ability specially for someone weaker than himself, so, yeah, Aizen was still not at Captain-Commander's level of power, or destructive force, to say the least.
Thus, "There hasn't been a Shinigami stronger than me born in the last thousand years" should still be considered as a fact.
Well, considering this within the thread's topic of debate, some of Royal Guards may or may not be older than a thousand years old, so, that's not a bounding argument at all. And even if they are older, that doesn't necessarily mean the people who have been stronger than Captain-Commander were the Royal Guards.
About Aizen and Yamaji's power. As I said, Aizen needed Arrancars (that he considered stronger than captains) to invade RG. Of course he'd handicap Yamaji. Old man could oneshot his entire army as his last stand.
And sorry to burst your bubble, but Aizen wasn't just a Shinigami there.
He had already fused with the Hougyoku at this point.
I think Yamamoto is stronger than the RG's on a 1 on 1 fight.. Until proven otherwise..... ^__^
If we did, - and this is not accurate at all, but just for the sake of it - and we came up with something like
average numerical strength of G13 captains (already misleading but still) - 10 (to keep the maths easy)
average numerical strength of G13 vice captains (as above) - 1 (again, for easiness sake)
This equals 120 + 13 (assuming that a new VC had been chosen for Yamamoto) - or 133
Now let's assume that the royal guards were equal to 40 each - 40 * 5 = 200
Yamamoto could still be a 66 and that 'maths', as ridiculous as it is to do such maths, would still work (199 to 200 respectively).
Now I do not think that Yamamoto was 'that' much stronger than all the Royal Guards, but still, there is no reason why he couldn't be stronger than them individually and the statement still hold.
As for the question of if he is weaker than the royal guards (combined) or not - yes, I believe he probably is...
Until other bankais have been seen, Ryuujinjakka makes Yamamoto pretty much untouchable in most/all fights (if not stolen that is)...
Here look at this, just for math's sake...
Yamamoto - 10
RG's - 45 ( 9 for each)
the rest of GOTEI 13 is 30... which means there's 40 including yama.. but RG has 45 which makes them stronger thant gotei 13 all together.. But individually they lose to Yama since they are only 9..
I made you math that can make the RG's stronger than GOtei 13.. just to make the statement of Shunsui true.. but still can't prove that Yama is weaker.. i still believe he is stronger until further evidences.
Ya guys don't get it Yamoto created the soul society and every time you see him appear you always see how powerful he is. Don't you also think if that dude with tha yakuza hairstyle know Unohana which is one of the oldest of the member in the soul society and taught her how to heal. If you add it up he could be one of the first generation Gotei 13 and so might the other member of the royal guard they never said that the first generation is gone. Am making suggestion but i think the yakuza dude is probally a captain of the second division cause they gave him the nick name lightning flash well that my opinion.