Unknown Dungeon

1 Pokémon can be caught at Unknown Dungeon in Kalos — highlighted on the map below.

The Unknown Dungeon is a tiny cave in southern Kalos, entered from the Pokémon Village with the help of Surf and open only to trainers who have reached the Hall of Fame. Its interior is nearly featureless apart from scattered rocks and dripping water, and at its center waits a lone Mewtwo holding either Mewtwonite X or Mewtwonite Y. The site deliberately echoes Kanto's Cerulean Cave, whose Japanese nickname it shares.