That doesn’t change the fact that Kisame could still keep up with V2 Bee. 7th Gate Gai is beating most Kage, no shame in losing to him, especially when Kisame was nerfed and at a matchup disadvantage. Aoba described Kisame as “the man strong enough to be paired with Itachi,” which implies some degree of relativity.
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I don't think it's fundamentally changing anything on Kishi's part. He's still incredibly powerful, but do you think when he wrote part 1... he didn't plan on Akatsuki members to hunt tailed beasts lol? Kisame did exactly that, I don't think it changes anything in how Kishi views Kisame over time, besides a general powercreep series wide(in part 1 characters couldn't do big explosions and stuff, yk what I mean)
I'm not downplaying him for losing to Gai, I'm just pointing out that their rivalry was established in part 1, and continued until the second part. I'm just pointing out that I think his portrayal is pretty consistent.
I'm also not going to take that partnered with Itachi comment too seriously. Sure, among all the Ninja in the world, Kisame is closer to Itachi then most....but are they even on the same tier? I don't think so.
Orochimaru failed to even pierce 4T Naruto with his Kusanagi sword and was running out of chakra. 4T Naruto could have kept going if Yamato didn’t suppress him.
Fair enough, but tbf, is he supposed to fight a tailed beast with base swordsmanship alone? This is an Orochimaru who didn't:
Have his arms(spiritually, I guess)
was in base
his body was rejecting him
I think you'd have to be like Madara tier to still take a win in that situation lol. But you do have a point, by 4 tails he did start struggling. Non nerfed Orochimaru should still be like a tier above that, given his whole thing was knowing all sorts of Jutsu.