Island of Isolation

Island of Isolation (Japanese: の Island of Isolation) is a dungeon in that is located on the Mist Continent. It is unlocked by reaching. Once this dungeon is cleared, it cannot be visited again.

Upon entering the dungeon, the undefined will immediately fight. After being defeated once, Mewtwo will Mega Evolve into either Mega Mewtwo X or Mega Mewtwo Y for a second battle. Upon completion of the second battle, Mewtwo will connect with the player and give them the, one of The Eight Treasures. Afterwards, Meteorite Crater will be unlocked.

In other languages
Insel der Einsamkeit Île de l'Exil 孤高の島