WARNING: Disable Cobblemon! Keep it disabled! Launch the game again after it's first ever launch with this mod.
This mod intends to make 1.20.1 Cobblemon compatible with other mods that rely on a newer version of Kotlin than Cobblemon was packaged with.
If you are using other Cobblemon Addons disable them, launch with this patcher enabled, read the popup, and then ONLY reenable them. Do not enable any Cobblemon main mod jar.
WARNING: I am a total newb at Minecraft mod development and this is likely a poor solution but it works! Hopefully...
What it essentially does is automate the deleteing of two Kotlin folders within the Cobblemon.jar, allowing for a newer version of Kotlin, likely from Fabric Langauge Kotlin, to take it's place. This can be done manually without this mod but I wanted to make things as plug and play as possible for my friends.
The original reason why this was made was to allow Create 6.0 Estrogen and it's dependency, Cynosure, to work with Cobblemon.
If you need help or find any issues my Discord is tsubameuwu.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as cobblemon-kotlin-patcher.jar — drop this file into the mods folder
- Download size: 5 KB
- Download link checked 9 Sept 2026 — working
These come from our own check of the pack file, not from the source page.