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Cobblemon Mass OutbreaksMinecraft mod for 1.21.1

The "Cobblemon Mass Outbreaks" mod is a Cobblemon addon that introduces Mass Outbreaks.

server onlynewest supported 1.21.1AdventureMobsGame MechanicsWorldgen
Latest version
1.0.0-1.21.1-fabric
Loaders
Fabric, NeoForge, Forge
Licence
MIT
Downloads
217.0k
Updated
15 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Cobblemon Mass Outbreaks servers

One click and Cobblemon Mass Outbreaks is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Fabric
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Cobblemon Mass Outbreaks declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.20.1Fabric, Forge, NeoForge17+declared12 Jun 2023
1.20Fabric, Forge, NeoForge17+declared2 Jun 2023
1.19.2Fabric, NeoForge, Forge17+declared5 Aug 2022

Download

From Cobblemon Mass Outbreaks’s own host. Nothing is re-hosted here.

1.0.0-1.21.1-fabricrelease2 Jul 2025

cobblemonoutbreaks-fabric-1.0.0-1.21.1.jar · 0.2 MB · for 1.21.1

Download latest
a092d846a1c4
Older versions6
  • 1.0.1-1.21.12 Jul 20251.21.10.2 MB21.4k downloads0385a31a6140Get
  • 1.0.0-1.21.17 Mar 20251.21.10.2 MB6.8k downloadsb4bfb628fd8cGet
  • 1.0.623 Nov 20231.19.20.1 MB1.3k downloads57e3f0e03394Get
  • fabric-1.1.4-1.20.123 Nov 20231.20, 1.20.10.1 MB77.1k downloads45926b609ca5Get
  • 1.0.5-1.19.223 Nov 20231.19.20.1 MB752 downloadsc6a0b52fb291Get
  • 1.1.4-1.20.123 Nov 20231.20.10.1 MB18.8k downloadse1d584fd7a2aGet

Frequently asked

Does Cobblemon Mass Outbreaks work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Cobblemon Mass Outbreaks declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Cobblemon Mass Outbreaks support?

Everything the author has declared, from 1.19.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Cobblemon Mass Outbreaks on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Cobblemon Mass Outbreaks support?

Fabric, NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Cobblemon Mass Outbreaks?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Cobblemon Mass Outbreaks under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Cobblemon Mass Outbreaks?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Cobblemon Mass Outbreaks safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .