I'd be curious to hear more about how this would function in a theme park. My first thought is that while it sounds great (and really true to the games), it'd really struggle to move people through. I'd have second thoughts on making the big attraction in a land something with severely impaired capacity. But, maybe I'm not thinking of something obvious that would make that not the case!
I'd say just make it a building with 4 screens. It's kinda insane Universal didn't do at least two for The Mario Raid.....
Also I think the fact that you know it would be that popular is why they should do it, Universal doesn't seem to mind people waiting 3-4 hours for MK or Hagrids Coaster
But if they really want to do it right make a building make it a box and have a screen in a room on each side and should help move people, if they are really concerned then make it two story with the same design
I think just adding on game stuff that doesn't fit the game to me is kinda lazy, Pokemon is about turn base attacking and having more then one Pokemon in your team...a ride can't really translate this well but a Raid/show could.
I think it would also bring in people daily....if only X amount of Pokemon randomly appear in the park then you might literally have facebook and reddit groups tracking which Pokemon are in the park each day and people will come down just to catch a gyarados and god help us if their are shinies, lol
It's why I think Pokemon is perfect for Universal....it's the biggest IP in the world, it is for everyone now not just kids, more then enough merch to sell and more then enough Pokemon to make it where people want to constantly be at your park so they can catch more or level up the Pokemon they have.
But to make it work, it takes a land...you want a ride to draw people who don't care about catching Pokemon, games so you have something to do to level up Pokemon for the raid and Raids as something you can change for events and also be the reason your are paying 70+ bucks for some stupid piece of plastic shaped like a ball.