
Modrinth · Minecraft mod
AllTheMons x Mega Showdown
Always wanted to play Mega Showdown with AllTheMons? Well that's the version you have been waiting for! PLEASE read the description!
Quick answer
Which AllTheMons x Mega Showdown release should I use?
AllTheMons x Mega Showdown v5.0 targets 1.21.1 with Fabric, NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. All 6 required mods have matching files.
Where it goes
Is AllTheMons x Mega Showdown 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 AllTheMons x Mega Showdown v5.0 need?
v5.0. Change the file and its required mods may change too.
Install Cobblemon: Mega Showdown, Cobblemon, oωo (owo-lib), Architectury API and 2 more first. We found matching files for this game-version and loader setup. 4 come through another mod in the chain.
4 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 AllTheMons x Mega Showdown without breaking your instance.
Built for AllTheMons x Mega Showdown v5.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use v5.0. It targets 1.21.1 with Fabric, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cobblemon: Mega Showdown, Cobblemon, oωo (owo-lib), Architectury API and 2 more first. We found matching files for this game-version and loader setup. 4 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 v5.0. It opens that exact file at the source.
About this project
What does AllTheMons x Mega Showdown add?

AllTheMons is a collaborative effort from many contributors to add as many Pokemon as possible to Cobblemon. All of the addons below have been modified to ensure that there's no overlap, which prevents game-breaking bugs/crashes you would experience without AllTheMons.
This still requires Mega Showdown - it's an addon for it!
Don't use this and regular AllTheMons - Use either ATM or ATM x MSD!
Addon & Mod suggestions:
The following addons and mods are personally approved and/or tested my me and my recommendations. They feature full compatibility with AllTheMons x Mega Showdown and might make your game a little bit cooler!
Click for Addon & Mod suggestions!
Legendary Monuments
Adds many Structures and Dimensions where legendary Pokémon can be obtained. ATM x MSD automatically disables random legendary spawns from this addon if installed (only the ones that are obtainable through LM)
Ultra Space or Ultra-Beasts
Add Dimensions where Ultra Beasts can be obtained. ATM x MSD automatically disables random Ultra Beast spawns from this addon if installed
Lost Lore
Adds many Pokémon from the extended canon that is the Anime/Movies, Manga, Side Games and more. Okay it's my own addon so #ad I guess?
Better Caps
Tired of Pikachus flat brim? Better Caps turns his cap into an actual three-dimensional piece of art. Also my addon tbf but I wouldn't have made it if I didn't feel like someone might need it!

How to install:
This addon comes in both a Mod version (.jar) and a addon (.zip). If you prefer easy installation - install it as a mod - as any other mod. For the addon version, expand the section below:
Data/Resource Pack version install
Cobblemon addons (.zip) that add Pokémon are both data & resource packs in one file, so installing them automatically via the modrinth launcher won't work - You have to do it manually. Please follow the instructions below to make sure ATM x MSD is properly installed and can function as intended!
Singleplayer:
Put the .zip in /saves/[WORLDNAME]/datapacks not /datapacks
Put the .zip in /resourcepacks
Enable in game ESC - Options - Resource Packs
Servers:
Put the .zip in /world/datapacks
Sometimes it's called myworld, or something similar, sometimes it has a name instead
If you're in doubt about the correct folder, consult your server providers guide on how to add datapacks
Every Player has to have the .zip installed as a Resource Pack
Best option if for them to have it installed and enabled in their clients
It's possible to add them to server resources, but note that there have been issues with this for some cobblemon addons, so try whatever method suits you better

What does ATM x MSD include?:
Adds missing Pokémon to expand Cobblemon to 1023/1025 Pokémon!
Overrides models from Mega Showdown & Cobblemon to provide better ones
Adds tons of animations & quirks to existing Cobblemon models
All of them are obtainable in survival without compromises!
Fixed & added most Pokédex entries and descriptions
Adds all missing recipes from Mega Showdown
Riding support for lots of the added Pokémon
Somewhat lore accurate spawn locations

Documentation, Help/Support, Compatibility & License:
General Documentation:
Click to unfold!
- A list of all Pokémon in ATM x MSD
- A list of all Evolutions that differ from the original games
- Special methods to obtain Type-Null, Mewtwo and Genesect
- A list of all rideable Pokémon
Where all included Pokémon spawn:
Click to unfold!
You have two options here, depending on what you prefer.
The Spawn spreadsheet:
If you prefer looking at lists you can find the Spawn Spreadsheet for this addon here
This is currently the preferred method as the spawn bot is not updated yet.
The AllTheMons Discord:
If you prefer having discord open and want to type commands rather than having another browser running you should follow this:
- Join the AllTheMons Discord
- Type
!spawnsin the bot-commands channel
From there our fully automated bot will tell you all about the spawns - including rarity, spawn conditions, requirements and biomes. It also includes all base Cobblemon spawns so you can find everything in one place.
NOTE: Don't ask questions about AllTheMons x Mega Showdown or Mega Showdown itself over there, and note that most commands over there don't apply to this version
If we notice continued breakage of that rule you'll be muted/banned and won't be able to receive any support/usage of the spawn bot.
NOTE: REMEMBER - ATM x MSD will automatically disable random spawns for the legendaries obtainable in Legendary Monuments & also disable random Ultra Beast spawns if Ultra Space or Ultra-Beasts are installed!
Where to get help, leave a suggestion or report a bug?:
Click to unfold!
- Join the Mega Showdown Discord
- Go to this channel
Again - don't ask questions regarding AllTheMons x Mega Showdown or Mega Showdown itself on the ATM discord. If we notice continued breakage of that rule you'll be muted/banned and won't be able to receive any support/usage of the spawn bot.
Incompatible addons & mods (delete those):
Click to unfold!
Due to the collaborative nature of this addon and the amount of different assets added - there's lots of incompatible mods and addons.
Premade Modpacks:
You can get it to work but since they might use incompatible addons for core aspects of gameplay, it might be a lot of file management to fix it. You're better off leaving it as it is since or make your own one with the entire incompatible addons list in mind.
If you want to make it work for any modpack, your best advice is asking the modpack author or people in their discord for help/advice - I won't provide help for it other than this incompatible list.
Incompatible Mods:
- Complete Cobblemon Collection (CCC), Hiddenmons, Journey Mounts, Legends Untold (& Reborn)
Addons including the same Pokémon:
All addons that contain any overlapping Pokémon/Files, here's some examples
- AllTheMegas, CavsCobbleMons, CobbleRemodels, Complete Cobblemon Collection (CCC), Coolrex's Cobblemon Collection, Legends & Myths, Missing Legends, Mysticmons, Myths & Legends, Planeta's Pokémon Pack...
All addons already included in AllTheMons:
I suggest you check the linked documentation for a list of all of them
Other versions of AllTheMons:
This includes regular ATM, other forks like BCG x ATM and all older versions of ATM x MSD
Permissions & License (usage on modpacks/public servers)
Click to unfold!
All Developers of these packs gave their full permission for their assets to be used, proof of these can be found within the addon file, in a folder titled "Proofs of Permission"
Due to this collaborative effort, AllTheMons has a strict license to make this even possible in the first place. Read it before starting a server or modpack containing the addon. You can find it here.

All the lovely Contributors and their addons:
AllTheMons by easy_____ & me
AshiMons by ASHISK
Bonimons by Bonanca
CloudMons by Wi2tert
CobbleCats by Raspix
CobbleMotion by Lenka
DeCubes MoMons by DefaultCube
GenoMons by GenotypeXD
HiddenMons by LegenTM
Hydro's Reanimodel Pack by BlazeHydroxide
Kale's Collection by Kale
LackingMons by Beezy and IZetyXX
Liberty Garden by Lvnatic
MissingMons by RedRibbon
Monkeymons by Bonanca
MoreMons by YaBoiBruno
MundialMons by Alexiocraft
Nadymons3 by Nady3
OdysseyMons by BifeSalgado & Aki4hiro
Pigeon's PokePack by ElPigeon
Swirlix and Slurpuff for Cobblemon by ARaccoonNamedFish
Project description from Modrinth.
Pick your setup
AllTheMons x Mega Showdown by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
3 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
AllTheMons x Mega Showdown versions and loaders
v5.0
ATM x MSD [v5.0].jar
16 Oct 2026
v5.0
ATM x MSD [v5.0].zip
16 Oct 2026
v4.0
ATM x MSD [v4.0].zip
8 Sept 2026
v3.7.0
ATM x MSD [v3.7.0].zip
30 Jul 2026
v3.6.1
ATM x MSD [v3.6.1].zip
8 Jun 2026
v3.6.0
ATM x MSD [v3.6.0].zip
27 May 2026
v3.5.0
ATM x MSD [v3.5.0].zip
9 Apr 2026
v3.4.0
ATM x MSD [3.4.0].zip
18 Mar 2026
v3.3.0
ATM x MSD [3.3.0].zip
12 Feb 2026
v3.2.1
ATM x MSD [3.2.1].zip
27 Jan 2026
v3.2.0
ATM x MSD [3.2.0].zip
26 Jan 2026
v3.2.0LM
ATM x MSD [3.2.0LM].zip
26 Jan 2026
Looking for an older file? The official Modrinth project page is in Resources.