Translations:Frequently asked questions/32/en
From Pixelmon Wiki
Is it possible to disable natural spawning of Pokémon?
This is possible by editing the Pixelmon config file. Find the spawnDimensions
setting, and remove the 0 (Overworld dimension) from the list. This setting does not affect Pixelmon spawners, making it possible to set up a world so that Pokémon only spawn from Pixelmon spawners.
Can I disable the natural spawning of NPCs?
NPC spawning can be disabled in the NPC external JSON files by enabling the files in the config and then changing each NPC type's rarity to 0.