>>40421890>Fade in? Exist in the overworld once you enter the area but not load in until render distance is reached?Both of those have been seen to happen and there were faggots saying that looked like shit too.
>Only spawn in outside of the player's view?That would make it so you'd likely miss tons of pokemon unless you were constantly spinning the camera around or by them spawning just out of your view as you go by. They need some kind of system to bring in new Pokemon to keep the area looking at least somewhat less empty.
They have to facilitate likely nearly 100 different Pokemon spawning into this wide open area continuously. Having them pop out of the ground with a puff of smoke is silly looking, but it's honestly the best option available considering the sheer diversity. Having some come out of the sky would probably help shake things up a bit, but the fact remains there really isn't many ways to make this work.