Board Thread:Versus Debates/@comment-26005711-20160130095118/@comment-734582-20160203094112

Slaphappyjoy wrote: What I said was "unbeatable" requires stipulation. If you can name such KKG then go ahead. If you can't, then as I said the writers haven't given us any. Kamui obviously beats kamui (Rare &KKG), Human Path should stop the user from becoming intangible, Preta should be able to absorb ranged Kamui (Both rare&kkg).

Then there's Minato's way of defeating Obito, which would have to happen even faster, but it's something i'd classify as even more rare.