Pokémon is four quadrant appeal incarnate. Almost everyone knows and loves Pokémon and aren't ashamed of it. Hello Kitty is aimed towards the female crowd and that's ultimately why it didn't fly so well in Orlando compared to how it is in Cali, demographics play a role in HK's success between coasts too.
Everyone, and I mean almost everyone will look at Pikachu, Charizard, Mewtwo, Eevee, Gengar, Snorlax, Jigglypuff, Magikarp and go:
"Oh, I know them, they're cool, I like them."
It doesn't matter their age (though it might be hard to sell 60+ crowd, but those boomers should be getting another BTTF thing probably), race, whatever. People love this IP to death and they're unashamed of it.