Can't be crafted but can be obtained from Den's, Sold Very Rarely by NPC's that roam/spawn in the world or found on the ground very rarely.
Relic Ruins: (based off of Relic Castle from Pokémon Black and White) Spawns underground in Desert Biomes and is twice as rare as Desert Temples. Can be found due to the entrance sticking out of the ground. Relic Ruins contains a variety of treasures ranging from Relic Loot, Evolution Stones/items, Items related to Legendary/Mythical Pokémon, General Pokémon Items normally in Desert Temples or your Generic Minecraft Loot such as Diamonds, Emeralds, Gold, Iron, Enchantment Book Etc.
Poke Mall: found rarely in villages and if successfully generated will replace Poke Marts and contains numerous NPC's to buy items from. Merchants that spawn out in the world will spawn here a bit more commonly.
Dragon Spiral Tower: Structure from Pokémon Black and White. Uses the Dark Stone, Light Stone to Summon Zekrom or Reshiram.
Pokémon Battle Stadium: Very Challenging. Battle Trainers for prize money and items.
NPC N: found very rarely in the world. do quests and battle him to obtain Zekrom or Reshiram.