Taking this from the
Can Yamamoto defeat Aizen? thread
There is no debate whatsoever that Yamamoto has the most destructive power in all Bleach thus far. His Shikai has enough power to wipe out cities / His Bankai has enough power to wipe out a dimension.
Yamamoto vs. Hog. Aizen comes down to Kubo's plans about the whole 'transcendent reatsu'. If it's "transcendent reatsu > ALL reatsu" then yes, Yamamoto is the weaker. However, if transcendent reatsu is simply another type of reatsu that unlocks 'off-limit' abilities, then no Yamamoto is the stronger.
And really, if "transcendent reatsu > ALL reatsu's" then Gin would have not tried to stop Kyoka Suigetsu, what's the point of stopping KS if Aizen's reatsu would trump Gin's anyways? Again, this is the same character who witnessed Aizen destroying the cleaner, yet his main worry was Kyoka Suigetsu, not "Aizen-sama's ever so godly reatsu".
Besides really if we talking about unability to sense reiatsu than Royd wasn't able to tell where the flame of East went aka he couldn't sense a reiatsu made flam. Neither was he able to see and sense east before Yama actualy allowed him to see it and even than Jugo needed to actualy think before comming up with the idea that the flame is reiatsu and he just came up with it and not actualy sensed the feeling of reiatsu.
This is one of those vague, gray areas in Bleach. Basically, Aizen declared that he was a transcendent being, but he never really gave an idea of what that means, mentioning only that his reiatsu could not be felt by anyone not on his level. However, then comes Ichigo and Aizen can't feel his reiatsu, which he tries to claim is because Ichigo gave up his reiatsu for physical power, but Ichigo pretty much disproves this instantly. Aizen could not fathom that Ichigo could also be a transcendent being so thats where we are stuck. You could say that Ichigo had gone to a level even higher than Aizen and thus were both transcendent beings, or you can say that there is no such thing as a transcendent being. Frankly, I believe that the whole transcendent being thing was just Aizen being full of himself as usual, but the story never really clarified itself one way or the other.
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Already countered, Aizen said that Ryujin Jakka is strongest zanpakuto.
???
Yamamoto being reiatsu crushed? I don't think so!
Huh? Ichigo had to go over a thousand year hyperbolic training to acheive his Final Form to defeat Aizen.
Yamamoto himself is way older than 1000 years. Driscoll said that Chojiro didn't used his bankai in 2000 years, when Chojiro learned his bankai, Yamamoto was already pretty old.
Hogyoku Aizen's spiritual power is to the point where it can't be sense.
Aizen implied that Ichigo was transcedent during Fake Karakura Town. Information we have say that transcedental reaitsu can't be sensed. And you know Ichigo's reiatsu wasn't sensed during Fake Karakura Town.
1. Unohana said that Ichigo has two times captain reiatsu based on path Ichigo made in Gargatana and his robe.
2. Aizen needed to come into contact with Ichigo's Getsuga Tensho to say "So this is your reiatsu".
It would be all ok, if Gin didn't trashed Ichigo.
I didn't see the same thing being said for Yamamoto.
Wrong!
Besides really if we talking about unability to sense reiatsu than Royd wasn't able to tell where the flame of East went aka he couldn't sense a reiatsu made flam. Neither was he able to see and sense east before Yama actualy allowed him to see it and even than Jugo needed to actualy think before comming up with the idea that the flame is reiatsu and he just came up with it and not actualy sensed the feeling of reiatsu.
you don't understand how fights work in bleach. fights are mostly based off of reiatsu, more so than even skill. yama's flames are just his reiatsu in the form of flames. as aizen himself ecplained, a fight between shinigami is a fight between spiritual pressure. soi fong's shikai ability is death in 2 strokes. her ability is literally a death sentence if you get hit in the same spot. aizen survived it because his reiatsu was so much greater than hers. it's the same reason why ichigo was able to swat away aizens level 90 black coffin. ichigo originally couldn't even cut kenpachi because he wasn't releasin enough reiatsu when he attacked. the same will apply to aizen vs yama. aizen is so much more powerful, that the flames won't have the same effect it does on everyone else, period.
You are making one small mistake. According to Hogyoku Aizen he is not shinigami anymore. Plus, you would need to prove that Aizen reiatsu is greater than Yamamotos. And there is still a thing about Gin,
And really, if "transcendent reatsu > ALL reatsu's" then Gin would have not tried to stop Kyoka Suigetsu, what's the point of stopping KS if Aizen's reatsu would trump Gin's anyways? Again, this is the same character who witnessed Aizen destroying the cleaner, yet his main worry was Kyoka Suigetsu, not "Aizen-sama's ever so godly reatsu".