Cobblemon Ultra Wormholes

Cobblemon Ultra Wormholes

Server Raid-like Ultra Wormhole events that spawn boss Ultra Beasts for players to battle and catch.

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23.3K Downloads
fabricneoforgemobs
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About this Mod

Please consider supporting me on ko-fi if you like the mod and can afford it, I appreciate even 1 dollar. Ko-fi


I grant permission to anyone seeking to add my mod to a modpack


Cobblemon Ultra Wormholes adds timed Ultra Wormhole events that spawn an Ultra Beast as a shared raid-style encounter. When a wormhole opens, players can find the active boss, join the battle, and chip away at the same shared HP pool. Any number of players can participate, and rewards are handled per contributor rather than only going to the final hitter, the chance to catch will require a beast ball in the players inventory and 1 will be consumed for the capture

The mod is purely server-side, with optional client visuals for players who have it installed on their client as well.

Features

  • Random Ultra Wormhole events on a configurable timer
  • Ultra Beast encounters with a shared HP pool across all participating players
  • Any number of players can join the active boss fight
  • Contributor-based rewards for players who actually took part in the battle
  • Optional Beast Ball required capture prompt after the boss is defeated
  • Configurable species pool(In case server owner wants to use it for other mons)
  • Configurable per-species movesets, held items, natures, and EV spreads
  • Configurable per-species reward tables
  • Configurable shiny chance, event timing, spawn distance, boss level, boss scale, and HP multiplier
  • Active wormholes and boss state persist across server restarts

How It Works

  • A wormhole opens near a random online player, or can be triggered manually by command
  • An announcement is made in chat with Xaeros support coordinates
  • The Ultra Beast spawns as the active event boss
  • Players can challenge it and join the encounter while it is active(default 10 mins)
  • All participating players fight against the same shared boss HP pool
  • When the boss is defeated, contributors receive rewards
  • If a contributor has a Beast Ball, they can choose to spend it for a reward copy of the defeated Ultra Beast instead of taking item rewards
  • After a short post-battle delay, the wormhole closes and the next event timer starts again

Configuration

The mod uses config/ultra_wormholes.json.

Available settings include:

  • broadcastOnOpen
  • shinyChance
  • minEventIntervalSeconds
  • maxEventIntervalSeconds
  • eventDurationSeconds
  • spawnRadiusMinBlocks
  • spawnRadiusMaxBlocks
  • bossLevel
  • bossScale
  • bossHpMultiplier
  • ultraBeastPool
  • ultraBeastMovesets
  • ultraBeastHeldItems
  • ultraBeastNatures
  • ultraBeastEvs
  • rewardPromptTimeoutSeconds
  • postDefeatCloseDelaySeconds
  • ultraBeastRewards

This makes it possible to adjust both the overall event behavior and each individual Ultra Beast loadout.

Commands

All commands require operator permission level 2.

  • /wormhole start opens an Ultra Wormhole event immediately
  • /wormhole stop closes the current active wormhole
  • /wormhole status tells you whether an event is currently active
  • /wormhole reload reloads ultra_wormholes.json without restarting the server

Client Visuals

If players have the mod installed on the client, the active event can also use custom skybox(the_end) and wormhole visual effects. The encounter itself is still managed server-side.

Available Versions

Cobblemon Ultra Wormholes 1.1.1-NeoForgerelease
MC 1.21.1neoforge
April 6, 2026
Cobblemon Ultra Wormholes 1.1.1-Fabricrelease
MC 1.21.1fabric
April 6, 2026
Cobblemon Ultra Wormholes 1.0.0release
MC 1.21.1fabric
March 15, 2026
Cobblemon Ultra Wormholes 1.0.0release
MC 1.21.1neoforge
March 15, 2026

How to Install Cobblemon Ultra Wormholes on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Cobblemon Ultra Wormholes". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricneoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Cobblemon Ultra Wormholes server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Cobblemon Ultra Wormholes compatible with fabric and neoforge?

Cobblemon Ultra Wormholes officially supports fabric, neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Cobblemon Ultra Wormholes – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Cobblemon Ultra Wormholes consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Cobblemon Ultra Wormholes with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.21.1