Buu is so fluid that it's hard to claim him as a definitive example, but it definitely seems that, filler aside, the claims of the kienzan being able to cut through anything have never been refuted, and there's plenty of instances to support it being able to cut through things that Krillin's power level is too weak to allow, such as Frieza.
Krillin really could have been spectacular if he hadn't gotten Overshadowed by Awesome.
edited 24th May '13 7:21:07 AM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Most of the cast has that, just in varying forms of durability.
Ultimately, infinity is subjective. "Cut through anything" doesn't literally mean "it is impossible within the boundaries of physics, magic, and anything else you can conceive of for this to not cut through X". It means "capable of cutting through anything and everything that exists, as far as we know".
Likewise, "invulnerable" has an unspoken "to anything that's been attempted, possibly anything that exists at this time, but not necessarily definitely so". Most of the cast is invulnerable; however, most of the cast is also capable of unstoppable force as well, so it becomes an equation of "Is my unstoppable force more powerful than your invulnerability? If yes, you take damage. If no, you ignore."
edited 24th May '13 9:51:02 AM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.I think Buu can be as durable as he wants. I assume he let the bullets pass through him just to show that they'd have no effect even when he lets his guard down. Or because he doesn't care and it's less energy-expensive to just regenerate the bullet holes than to bother blocking the bullets.
You cannot firmly grasp the true form of Squidward's technique!Boo's regeneration is just an extension of him having full control over his physical being. So he can make himself soft or hard whenever he pleases while the rest of us have to go through the unwanted boner phase.
So yeah the most we can say is that Kuririn at a battle Power of 75,000 can cut cut through Freeza at a battle power of over 1,000,000. Although I have no idea if it's something that scales with the user's battle power like other techniques. I could see it going either way.
I was actually thinking about this earlier today, and it occurred to me that most of the techniques we see characters use are immensely wasteful. A beam so large it completely engulfs its target wastes a lot of energy; all the energy that isn't actually hitting the person. Then, what energy does hit them is spread out over their entire body, which is the absolute worst way to inflict damage to a person.
The kienzan, by comparison, has a very thin point of contact; on top of that, because it's a cutting edge that is constantly spinning, it doesn't even need to be strong enough to overpower its target; it is significantly easier to cut a line through an object than it is to crush it into powder. Much less force is required for the former.
So if Goku puts 100 kilonukes into a Kamehameha but only 15 kilonukes of force ever actually hit Frieza, that was a complete waste of an attack; Frieza shrugs it off like it was nothing. But the thin, curved kienzan has the potential to be completely fatal to non-regenerating opponents significantly more powerful than Krillin because it simply has better metaphysics behinds it.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.

What's all this "WILL be" nonsense?
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.