How do I install ErrorMons?

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 Modrinth — not every file is mirrored on our own servers.

What Minecraft version does ErrorMons work with?

The listing gives Minecraft 1.20.1, 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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ErrorMons

by Genotype · on Modrinth

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Open in MC Java Mods Get it on Google Play →

Missingno Is invading Cobblemon, with this addon you can get Missingno and its 5 variants in cobblemon

currently missingno is only available through commands

heres a guide on how to unlock each variant:

Missingno yellow: use a thunder stone on regular missingno at level 12

Missingno Ghost: Have Lugia in your party

Missingno aerodactyl: Take 27 damage in battle

Missingno Kabutops: Get freindship 182 on your missingno

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.20.1, 1.21.1
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 — see the MC Java Mods guides for the full walkthrough.

Verified by MCModsHub

Downloads as Errormons 1.1.zip
Download size: 164 KB
Download link checked 29 Aug 2026 — working

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

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All Datapacks for Java All Minecraft Java mods Java mods for 1.20 Java mods for 1.21