Cobblemon: Mega Showdown is a content expansion mod that adds mega evolutions, Z-Moves, Terrastallization, Dynamax, Ultra Burst, and Pokémon fusions to Cobblemon for Minecraft 1.21.1, available on both Fabric and NeoForge mod loaders.
Cobblemon brought Pokémon into Minecraft in a way that felt fresh and faithful, but vanilla Cobblemon deliberately ships without the flashier battle mechanics that define competitive and endgame Pokémon play. That means no Mega Charizard X swooping through your server, no Dynamax Snorlax towering over your base, and no Z-Move finishers to end a tough battle. Cobblemon: Mega Showdown fills that gap entirely. With over 7.6 million downloads since its February 2025 release, it has quickly become one of the most popular Cobblemon add-ons in the modding community. The mod is developed by YajatKaul and pulls together community-sourced models from some of the best Cobblemon resource packs available, giving each transformation polished 3D models rather than simple reskins.
Key Features of Cobblemon: Mega Showdown
- All 48 Mega Evolutions — Every canon Mega Evolution is included, from Mega Rayquaza to Mega Lopunny. Each mega form comes with its own custom 3D model sourced from community packs like Souls Megas, so your Pokémon actually look transformed rather than just getting a stat boost behind the scenes.
- Z-Moves, Dynamax, Tera, and Ultra Burst Gimmicks — Rather than installing separate mods for each generation's battle mechanic, Mega Showdown packages all five gimmicks into a single installation. You get Terrastallization from Scarlet and Violet, Dynamax and Gigantamax from Sword and Shield, Z-Moves from Sun and Moon, and Ultra Burst from Ultra Sun and Ultra Moon — all working within Cobblemon's existing battle system.
- Primal Reversions — Primal Groudon and Primal Kyogre are fully implemented with dedicated models from the Pokemans Pack. These ancient forms let you experience the weather-warping power of Hoenn's legendary duo right inside your Minecraft world.
- Full Fusion Pokémon Support — Calyrex fusions with Glastrier and Spectrier, Necrozma's Dusk Mane and Dawn Wings forms, Kyurem fusions, and other canonical fusion Pokémon are all present. Each fusion has its own model and form data, making them feel like complete additions rather than palette swaps.
- Datapack Customization — Nearly everything in Mega Showdown is datapackable. You can create custom Mega Evolutions, custom Gigantamax forms, and even invent entirely new Pokémon types through datapacks. The mod's GitHub Wiki documents how to build your own content, making this mod a platform for server owners who want unique gameplay.
- Riding Support and Accessories Integration — Transformed Pokémon can be ridden just like their base forms, and the mod integrates with the Cobblemon Accessories system. That means your Mega-evolved partner can wear cosmetic items while you ride it across the landscape — a small touch that adds a lot to the visual experience.
- All Alternate Form Changes — Beyond the headline gimmicks, Mega Showdown includes alternate forms for dozens of Pokémon: Rotom appliance forms, Shaymin Sky Forme, Lycanroc's three forms, Ogerpon masks, Castform weather forms, Minior cores, Silvally type forms, and more. These are sourced from respected community packs like MissingMons and HydroReanimodelPack.
Screenshots
How to Install Cobblemon: Mega Showdown
- Install either Fabric Loader with Fabric API or NeoForge for Minecraft 1.21.1. Both loaders are fully supported.
- Download and install Cobblemon for your chosen loader, as Mega Showdown is an add-on that requires the base Cobblemon mod to function.
- Download the latest Cobblemon: Mega Showdown file matching your loader version (Fabric or NeoForge) for Minecraft 1.21.1.
- Place the downloaded
.jarfile into your.minecraft/modsfolder alongside Cobblemon and its dependencies. - Launch Minecraft through your modded profile. The new gimmicks, forms, and items will be available automatically in-game.
Requirements & Compatibility
| Requirement | Details |
|---|---|
| Minecraft Version | 1.21.1 |
| Mod Loaders | Fabric, NeoForge |
| Required Dependency | Cobblemon (base mod) |
| Datapack Support | Yes — custom megas, Gigantamax, types |
| Multiplayer | Server and client compatible |
| License | Custom (MEGA-SHOWDOWN-LICENSE v2.0) |
What's New
- Shaymin has received a full model and animation rework for improved visual quality.
- Fixed a critical bug that caused dedicated servers to crash on startup.
- The mod continues to receive frequent updates, with the latest release on March 29, 2026.
Pros and Cons
Pros
- Bundles all five generation gimmicks into one mod instead of requiring separate installations
- All 48 Mega Evolutions included with community-sourced 3D models
- Highly customizable through datapacks — server owners can create entirely new content
- Supports both Fabric and NeoForge, covering the two major mod loader ecosystems
- Active development with frequent updates and bug fixes
- Riding and accessories work with transformed forms
Cons
- Limited to Minecraft 1.21.1 — no backward compatibility with older versions
- Requires Cobblemon as a base mod, so you cannot use it standalone
- Custom license may restrict redistribution or modification for some use cases
- Models are sourced from multiple community packs, so visual consistency can vary slightly between forms
Alternatives to Cobblemon: Mega Showdown
- Cobblemon — The base Pokémon mod for Minecraft that Mega Showdown builds upon, featuring catching, battling, and breeding without the extra battle gimmicks.
- Pixelmon — A long-standing Pokémon mod for Forge that includes its own implementation of mega evolutions and other mechanics in a separate ecosystem from Cobblemon.
- Pokemans Pack — A Cobblemon datapack that adds missing Pokémon models and forms, complementing Mega Showdown with additional creature variety.
Download Cobblemon: Mega Showdown
| Minecraft Version | Fabric | NeoForge |
|---|---|---|
| For Minecraft 1.21.1 | Download | Download |
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Frequently Asked Questions
Does Cobblemon: Mega Showdown work on servers?
Yes — Mega Showdown is fully compatible with multiplayer servers. Both the server and all connecting clients need to have the mod installed alongside Cobblemon for the gimmicks and forms to display and function correctly.
Can I create my own custom Mega Evolutions with this mod?
Yes, you can create custom Mega Evolutions, Gigantamax forms, and even custom Pokémon types through datapacks. The mod's GitHub Wiki provides detailed documentation on how to structure your datapacks, making it straightforward for server owners to design unique content for their communities.
Does Mega Showdown work with Fabric and NeoForge?
Yes — both Fabric and NeoForge are officially supported for Minecraft 1.21.1. You need to download the correct version of the mod file that matches your chosen loader, as the Fabric and NeoForge builds are separate.
Do I need Cobblemon installed to use Mega Showdown?
Yes, Cobblemon is a required dependency. Mega Showdown is an add-on that extends Cobblemon's Pokémon and battle systems with mega evolutions, Z-Moves, Dynamax, Terrastallization, Ultra Burst, and fusions. It will not function without the base Cobblemon mod present.
Can I ride Mega-evolved and Dynamaxed Pokémon?
Yes — riding is supported for transformed Pokémon forms. Whether your Pokémon has Mega Evolved, undergone Primal Reversion, or taken on another alternate form, you can still mount and ride it just as you would with the base form in Cobblemon.
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