My bad didn't see ur reply till now but I mentioned that they all apply I don't see one that doesn't. Only thing that may be disputed is snake eyes but even Orochi does not have that when he transforms. Kaido form is based off the Chinese dragon archetype.
When people refer to its scales they are mainly referring to carp scales, it is usually so unique to the dragon that it is counted how many of those particular scales they have.
Oda for first time, chose to draw the slash across Kaido's blue larger carp scales, not done before (in my recollection).
Then, for the first time, point out that Zoro managed to penetrate the scales.