![Mega Mayhem [Cobblemon-MSD] project artwork](https://cdn.modrinth.com/data/IRLL3wzr/9f89e96abefc382c928633992c1c2a7eb2d9766f_96.webp)
Modrinth · Minecraft mod
Mega Mayhem [Cobblemon-MSD]
A Cobblemon Mega Showdown datapack that adds a plethora of custom Mega Evolutions designed by me, Skull :) (and my friends, but mostly me)
Quick answer
Which Mega Mayhem [Cobblemon-MSD] release should I use?
Mega Mayhem [Cobblemon-MSD] 1.1.0-1.8.4-1.21.1+mod targets 1.21.1 with Fabric, Forge, NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. 1 required mod needs a matching file.
Where it goes
Is Mega Mayhem [Cobblemon-MSD] required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Mega Mayhem [Cobblemon-MSD] 1.1.0-1.8.4-1.21.1+mod need?
1.1.0-1.8.4-1.21.1+mod. Change the file and its required mods may change too.
Install filament, Cobblemon, Cobblemon: Mega Showdown, Laser's Additions [Cobblemon] and 6 more first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 9 come through another mod in the chain.
9 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Mega Mayhem [Cobblemon-MSD] without breaking your instance.
Built for Mega Mayhem [Cobblemon-MSD] 1.1.0-1.8.4-1.21.1+mod. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.1.0-1.8.4-1.21.1+mod. It targets 1.21.1 with Fabric, Forge, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install filament, Cobblemon, Cobblemon: Mega Showdown, Laser's Additions [Cobblemon] and 6 more first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 9 come through another mod in the chain.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.1.0-1.8.4-1.21.1+mod. It opens that exact file at the source.
About this project
What does Mega Mayhem [Cobblemon-MSD] add?

Currently added Megas:
- Noivern
- Bellibolt
- Archaludon
- Flygon
- Alolan Raichu
- Cetitan
- Centiskorch
- Bewear
- Magnezone
- Bouffalant
- Slaking
- Garganacl
Planned Megas
Spoiler
The Following Megas have models but need custom animations before implementation
- Dugtrio
- Azumarill
- Gholdengo
- Grapploct
Special Thanks <3
- TheRealSky
- CBill888
- f4es_
- yaboityron
- narenkite
- orion0333
- featur3creatur3
- lboystrate
- howleander
- eternally_a_burrito
- cosmicbonnii
- brickwallgaming
- aura_does_things
- shori2290
Project description from Modrinth.
Pick your setup
Mega Mayhem [Cobblemon-MSD] by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
5 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Mega Mayhem [Cobblemon-MSD] versions and loaders
1.1.0-1.8.4-1.21.1+mod
mega-mayhem-cobblemon-msd-1.1.0-1.8.4-1.21.1.jar
15 Nov 2026
1.1.0-1.8.4-1.21.1
Mega-Mayhem-1.1.0-1.8.4-1.21.1.zip
15 Nov 2026
1.0.1-1.8.0-1.21.1
Skulls-Mega-Expansion-1.0.1-1.8.0-1.21.1.zip
13 Sept 2026
1.0-1.8.0-1.21.1
Mega-Mayhem-1.0-1.8.0-1.21.1.zip
12 Sept 2026
0.2
Skulls-Mega-Expansion-0.1.zip
5 Sept 2026
0.1
Skulls-Mega-Expansion.zip
30 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.