Pokemon Disappear In Pokopia, Here's How To Get Them Back

"Fans have found that only around 30 Pokémon will show up in an area at once, and any excess ones will essentially "despawn" to make space for others. There are four main maps in, so if you do the math, you're not going to be able to see most Pokémon in your towns at the same time."

"You open the Pokédex to the page for the critter you're looking for and press the plus button to "search" for them. You'll then have to ask another Pokémon close by if they've seen them. If the Pokémon you're looking for is currently spawned into the world, the person you ask will point you in their direction."

"Head to the missing Pokémon's home, either by walking or by asking a Pokémon that knows Teleport to take you there. Once you arrive, you can use Honey to have the Pokémon spawn nearby. Someone else will then be sent to despawn jail, but now you'll know how to bring them back when you need them."

Pokopia contains 300 available Pokémon but the game only renders approximately 30 in each area simultaneously, causing others to despawn. This technical limitation spans four main maps, making it impossible to see most Pokémon at once. To find a missing Pokémon, players must open the Pokédex and search by asking nearby Pokémon if they've seen the target. If the Pokémon isn't currently spawned, players must travel to its home location and use Honey to force it to spawn, which causes another Pokémon to despawn in exchange. This workaround system, while functional, represents a cumbersome process that players hope will be streamlined in future patches.

Read at Kotaku