Cobblemon Unchained
by tmetcalfe89
Players who want rarer Cobblemon encounters can use Cobblemon Unchained, a server-side add-on that boosts Hidden Abilities, shininess and perfect IVs during spawning, fishing and egg hatching.
What it does
Cobblemon Unchained changes the odds of certain results when a Pokémon appears. Hidden Abilities can spawn naturally in the wild, and defeating or capturing nearby Pokémon can raise the shiny rate of later spawns around the player. The same bonuses can also grant perfect IVs to nearby spawns.
The bonuses apply depending on the context in which a Pokémon appears: spawning in the wild, being fished up by a player, or hatching from an egg. Server owners and testers can adjust the boosters in the mod's configuration, where a debug setting prints feedback about why a booster did or did not apply.
The mod runs on the server alone, so players join without installing it. It requires Cobblemon, Cobblemon Counter, Cobblemon Tim Core and Kotlin for Forge on Forge and NeoForge. It is published for Fabric, Forge and NeoForge, with game versions 1.19.2 – 1.21.1, and it is open source under the MIT License.
Key features
Hidden Abilities in the wild
Hidden Abilities can appear on Pokémon that spawn naturally in the world.
Shiny boost from kills and captures
Defeating or capturing Pokémon raises the shiny rate of nearby spawns.
Perfect IVs for nearby spawns
The IV booster can give nearby spawns perfect individual values.
Fishing and egg bonuses
Bonuses also apply to Pokémon fished up by a player and to Pokémon hatched from an egg.
Debug output for boosters
A debug setting logs messages for each booster, showing which ones succeeded and which failed.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 3
Use cases
Testing a booster in spawning
Set a capture streak with a command, lower the debug setting and watch the IV booster report which spawn it perfected.
Who it’s for: Server owners who run Cobblemon and want to tune rare spawns, and players who want to test booster behavior on a local world.
How it compares
Naturally Spawning Withers is a Forge and NeoForge server mod for 1.20.1 – 1.21.5 that is not open source and is covered by All rights reserved. Cobblemon Alpha Project is open source under the MIT License, works on Fabric and NeoForge for 1.21.1 and needs the server while the client stays optional. Cobblemon Unchained is open source under the MIT License, covers 1.19.2 – 1.21.1 and runs on the server alone.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Cobblemon Unchained | Fabric, Forge and NeoForge | 1.19.2 – 1.21.1 | Server-side only | 2026-10-15 |
| Naturally Spawning Withers | Forge and NeoForge | 1.20.1 – 1.21.5 | Server-side only | 2025-05-27 |
| Cobblemon Alpha Project | Fabric and NeoForge | 1.21.1 | Server required, client optional | 2026-02-15 |
Questions
Does Cobblemon Unchained need Fabric API?
Do players have to install Cobblemon Unchained?
How can a booster be tested in a world?
In the catalog
Cobblemon Unchained is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from tmetcalfe89
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What the author says
…you could boost your lucky chances in Cobblemon based on your stats? For the boosters, head over to the config for the context you would like to test; for this example, we’re going to use the IV booster in a spawning context. Change the debug property to true, run the game, join a world. Run /cobbled_counter set…
Official listing
- Modrinth page
- modrinth.com/mod/cobblemon-unchained
- Owner
- tmetcalfe89
- Published
- 2023-08-12
- Updated on Modrinth
- 2026-10-15
- Facts verified
- 2026-10-15