thank you Epistaxis(or whatever you want to be called now), I also edited bits of the shading, see if you can spot it out.
and zac, it only appeared that way because you can't see under his arm on the right, but I edited it anyway to not make it seem that way.
And as for the tail, in his official artwork its pretty much the same case, its shaded as one big mass with like 0-2 lines going through it, I actually added more detail into it than the original, but idk I edited slightly.