How do I install Cobblemon - GraalVM Fix Backport?

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. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does Cobblemon - GraalVM Fix Backport work with?

The listing gives Minecraft 1.20.1. This is the version stated by the author or source site, not something we verified ourselves.

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Cobblemon - GraalVM Fix Backport

Java mod listed for Minecraft 1.20. Downloads from the MC Java Mods app on Android.

by phoenix492 · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Fabric1 build
Mod loader Forge1 build

Minecraft version

Minecraft 1.20.1Newest

Minecraft 1.20.1Newest

⬇ Download for 1.20.1 · Fabric ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Cobblemon 1.5.2 as it was the day of its release, with a single 2 line commit applied to fix a crash on GraalVM, and another 2 line change commit to fix a build problem.

Cobblemon's code is licensed under the MPL.

Cobblemon's assets are licensed under CC BY-NC 3.0.

By extension, so are this mod's.

See the mod's primary page linked above for any actual information.

Commits applied are:
3bfccdc0a5b4054a82b5144d67362e631f807222 - Relocate groups exported by GraalJS - Fix Crash on GraalVM

75531a812fb0a8f467d50177c5924d4a2b425dbb - bump versioning gradle plugin

Quick facts

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 CurseForge — 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.

File checked by MCModsHub

Ships as Cobblemon-forge-1.5.2+1.20.1.jar — drop this file into the mods folder
Download size: 100.0 MB
Download link checked 28 Sept 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.20