Now that you mention it, there is a resemblance...
Though I'm not sure about her hair.
Like I said, it's probably just a generic girl. I'm not even sure if that's Jigglypuff since it also kind of looks like the top of Clefairy or Vulpix' head...
I'm even wondering if it's Lillie with either Snowy, or a Clefairy (like she has in Masters) . That Alolan Ninetales on a recent poster has me especially curious and confused...
Though as has been mentioned, her being in the PWC doesn't make any kind of sense.
...but a lot of what goes on in PM2019 doesn't make sense, so...<_<