Cobblemon: Legends Untold

This datapack/mod expands the popular Cobblemon mod by adding legendary status Pokémon and their associated locations. The project includes 8 legendary creatures and 1 mythical being, accompanied by five new structures and seven items for interacting with them.
Important note: When using the datapack version, files need to be placed in both the resource pack folder and the datapack folder simultaneously. When updating your world, structure placement may need to be adjusted.
Legendary Pokémon and Their Locations
Rayquaza

This mighty dragon resides in the Sky Pillar - a rare structure found in mountain biomes. To summon Rayquaza at level 70, you need to climb to the top of the pillar with a Jade Orb. These orbs and special maps pointing to the Sky Pillar occasionally appear in various structures. Each server member gets only one attempt to catch this Pokémon.
Mewtwo

In legendary locations, you can sometimes discover Mew DNA. Using this valuable resource along with a Nether Star or Comet Shard in a Resurrection Machine, you can create the powerful Mewtwo.
Mew

This mythical Pokémon hides in the Faraway Ruins - an ancient structure located in jungles. Upon entering, a level 30 Mew appears. Old Maps leading directly to the ruins occasionally appear in various structures. Each player has exactly one chance to catch Mew. The location design is inspired by Faraway Island from generation III.
Xerneas

The majestic Xerneas guards the Tree of Life - a unique structure in oak forests. Approaching it causes a level 50 Pokémon to appear. Life Maps marking the tree's location are occasionally found by world explorers. Each trapper has only one catch opportunity for Xerneas. The Tree of Life concept is borrowed from the Pokémon Mystery Dungeon series.
Legendary Birds
Articuno, Zapdos, and Moltres are roaming legendary Pokémon that appear in all biomes without being tied to specific structures. Their spawn frequency is three times lower than starter Pokémon. Weather conditions affect encounter chances: Articuno appears more often during rain, Zapdos prefers thunderstorms, while Moltres favors clear weather.
Walking Wake & Iron Leaves

These unique forms inhabit special underground structures - Tera Dens. There are two den types: Water (for Walking Wake) and Psychic (for Iron Leaves). Approaching the central part of a den triggers the appearance of the corresponding legendary Pokémon at level 75. Occasionally, Tera Maps pointing to any den are found in world structures. Each individual in multiplayer gets a single capture chance for these creatures.
Why these particular legendary Pokémon? Developer intuition!