The Cobblemon Myths and Legends Minecraft mod adds a powerful mechanic to the Cobblemon experience: key items that influence Pokémon spawning. When players hold specific items and meet all spawn conditions, exclusive Pokémon can appear near them, each spawn fully dependent on fulfilling the required criteria. This system functions independently for each player, enabling multiple spawns simultaneously if conditions are met. Key items are discoverable in selected loot chests, with their rarity and spawn settings fully configurable for a personalized experience. Starting with version 1.3, players must either install the official Myths and Legends datapack or create their own to activate these mechanics. The datapack is available on CurseForge, and a GitHub repository is offered for modders who want to customize their experience. A dedicated wiki provides comprehensive details on current spawns, and a full custom spawn tutorial helps players add their own unique Pokémon to the world, enhancing creative gameplay potential.