The way I see it, and the way you see it, is that you hoaxed millions of people to promote your work. To me, that's unethical. That's lying.
However, you did have the courage to admit to the lie publically. And to admit that it was "extremely self-centered" takes humility.
I admire your artistic skill. I don't admire the lie, but I forgive you for lying to me. I appreciate that you are letting your skill stand on its own, now. And really, if I had known you personally, being pranked like this wouldn't have seemed so bad. There's more leeway in how you act around people you know. I remember, growing up, PurpleKecleon used to make fake Pokémon once in a while, just to mess with people. She was able to convincingly mimic Ken Sugimori's art style - they were good fakes, like yours. Though I was annoyed that she'd make fake leaks, it didn't bother me much because I knew her as a casual friend back then. I imagine if I had known you, your prank would have seemed like no big deal a lot sooner. So, I guess my point is, context matters.
Your prank went viral and exploded all over the internet, which made things both better and worse for you... but you can't control that.
Well, anyway, you do great artwork. Your attention to detail is commendable.