Spawn Pokemon only in Pixelmon

I have an Pixelmon server up and running. I know that spawn-monsters = false disable Pokemon from spawning, but enabling it spawns monsters like Creepers and Skeletons too. Is there an command that I'm missing?

I didn't change the pixelmon.hocon file from Pixelmon. This is my server.properties

#Minecraft server properties
#Mon Mar 22 23:15:32 UTC 2021
spawn-protection=16
max-tick-time=60000
generator-settings=
force-gamemode=false
allow-nether=true
gamemode=0
enable-query=false
player-idle-timeout=0
difficulty=1
spawn-monsters=true
op-permission-level=4
pvp=true
snooper-enabled=true
level-type=DEFAULT
hardcore=false
enable-command-block=false
max-players=100
network-compression-threshold=256
resource-pack-sha1=
max-world-size=29999984
rcon.port=25575
server-port=25565
server-ip=
spawn-npcs=true
allow-flight=true 
level-name=world
view-distance=10
resource-pack=
spawn-animals=true
white-list=false
rcon.password=alypixelmon
generate-structures=true
online-mode=false
max-build-height=256
level-seed=
use-native-transport=true
prevent-proxy-connections=false
enable-rcon=true

Solution 1:

While changing the server difficulty comes with additional side effects, if your intention for the server is to focus specifically on pixelmon, you may want to change the difficulty to peaceful. This will disable the spawning of anything that is aggressive towards the player, but should not include pixelmon creatures.

Additionally, in the pixelmon configuration file, there is a setting called "allowVanillaMobs" which by default is supposed to be set to false, disallowing all vanilla mobs.

Two choices seem to be your best bet:

If you want to simply disallow vanilla monsters you should set the difficulty to 0 (Peaceful)

If you want to focus solely on pixelmon and forego survival, you should double check if allowVanillaMobs is set to false. I would recommend setting the difficulty to peaceful anyway, so hunger does not become an issue.