Cobblemon Spawn Custom

A simple MOD to configure some customized properties from a spawned Pokemon, like IVs, Shiny and Hidden Ability chances.

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About this Mod

With this mod you can change how many IVs comes with a specific value or allow you to change the probability to a specific pokemon spawns with a hidden ability or being shiny. Totally customized with a configurable file.

To find the species name, you will need to access the Cobblemon/AllTheMons github and look for the spawn_world_pool folder. Inside it are the spawn configuration files for the respective pokemon.

Look for the "pokemon" variable and copy the name that is assigned to this property.

Tip: For paradox pokemon with compound names, for example Iron Valiant, you need to leave the name with the space (iron valiant), otherwise it will not be recognized.

Path to pokemon spawn configuration:

Cobblemon 1.6.1:

common/src/main/resources/data/cobblemon/spawn_pool_world All The Mons 2.3 (for Cobblemon 1.6.1):

data/cobblemon/spawn_pool_world (for regular pokemon) data/legendary_spawns_atm/spawn_pool_world (for legendaries) data/paradox_spawns_atm/spawn_pool_world (for paradox) data/ultra_beast_spawns_atm/spawn_pool_world (for ultra beasts) To keep cobblemon's default configuration set ha_chance and shiny_chance to 0.

Example Configuration:

{ "paradox": { "iv_value": 31, "iv_quantity": 3, "shiny_chance": 0.20, "ha_chance": 0.25, "species_list": [ "iron valiant" ] }, "legendary": { "iv_value": 31, "iv_quantity": 5, "shiny_chance": 0.10, "ha_chance": 0.15, "species_list": [ "celebi" ] }, "ultrabeasts": { "iv_value": 31, "iv_quantity": 4, "shiny_chance": 0.15, "ha_chance": 0.20, "species_list": [ "xurkitree" ] }, "ditto": { "iv_value": 31, "iv_quantity": 2, "shiny_chance": 0.01, "ha_chance": 0.01, "species_list": [ "ditto" ] } } Requirements Cobblemon 1.6.1

Available Versions

Cobblemon Spawn Custom 0.0.1release
MC 1.21.1neoforge
September 7, 2025

How to Install Cobblemon Spawn Custom on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Cobblemon Spawn Custom". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Cobblemon Spawn Custom server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Cobblemon Spawn Custom compatible with neoforge?

Cobblemon Spawn Custom officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Cobblemon Spawn Custom – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Cobblemon Spawn Custom consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

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Recommended RAM
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Details

License
GNU General Public License v3.0 only
Server-side
Required

Supported Versions

1.21.1