I too always thought Jynx was supposed to resemble an opera singer. The only reason I might think Jynx might be censored would be because it has or appears to have breasts (which apparently my mom thought was weird - she commented on it when she got her first one in Pokemon Go). I had no idea there was any sort of racial or "blackface" connection (or perceived connection) until reading this, and I watched Pokemon from the very beginning until partway through the second introduction of new Pokemon (Hoenn region) and still haven't stopped playing the games. And in the episode in the video, it should be blatantly obvious to anyone of any age watching that Ash has his face painted to look like Passimion, not another human - so unless they're going to start complaining about that Pokemon too, it doesn't make sense to me to see it as any allusion to "blackface" or anything. It's not any different from the time I dressed up as a dog for Halloween complete with leash, barking, and of course face painting, and no one had anything negative to say about that. At least, that's how I see it.
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Yet in my new wildness and freedom I almost welcome the bitterness of alienage. For although nepenthe has calmed me, I know always that I am an outsider; a stranger in this century and among those who are still men.
-H. P. Lovecraft, "The Outsider"