You won’t find Mewtwo in the Alola region, but if you caught it in previous adventures, you can now transfer this powerful companion to your Pokémon Sun or Pokémon Moon Bank via Poké Transporter from earlier games.
Receive a mystery gift of Mega Stone, Mewtwonite X or Mewtwonite Y, and evolve your Mewtwo into Mega Mewtwo X or Mega Mewtwo Y.
- Open your Pokémon Sun or Pokémon Moon game.
- Select Mystery Gift on the main menu.
- Select Receive Gift.
- Select Get with Code/Password
- Select Yes
- Select Yes again to connect to the Internet.
- Enter the code M2DESCENT
- Watch as you receive Mega Stones!
- Speak to the deliveryman in any Pokémon Center to pick up your Mega Stones.
- Be sure to save your game!
Have fun, trainers!