Cobblemon Ultra Space

Using an Ultra Scanner, a player can find the closest open wormhole inside 512 blocks of terrain that is already loaded, and the scanner shows that wormhole's bearing, how far away it sits and its height. Once inside, the dimension is explored through six Ultra biomes that combine mountains, valleys, water, caves, alien forests, crystal spires and ruins.

Ultra Crystals are crafted from Amethyst Shards, Obsidian and a Diamond. Each Sun, Moon or Prism Shrine hands out a single Ultra Crystal, and activating one can bring forth a level 70 Solgaleo, Lunala or Necrozma that a player is able to catch. A shrine activated once is shared across the whole server, and eleven Ultra Beasts, including Poipole and Naganadel, can be met in the dimension. Wormholes open only in the open air at night and disappear after 90 seconds by default.

The mod requires Cobblemon and Fabric API on Fabric for Minecraft 1.21.1. Pixelmon is also required by the author, and the mod works alongside the Cobbleverse addon. Because the dimension generates over time, the author advises backing up the world before updating. It runs on client and server, so the server and every player need it, and it is released under All rights reserved, which makes it not open source.