Mystery Zone

The Mystery Zone is a exclusive location that can only be accessed by doing optional events.

Catching Cresselia/Darkrai:

 * After reading the book in your house, you will be transported to the Mystery Zone, where, depending on which book that you read, Cresselia/Darkrai will join your team

Battling Dev RedGyrados:

 * After talking to the Youngster in the house on Route 3, you will be transported to the Mystery Zone, where you will be able to battle RedGyrados, the lead developer of Pokémon Resurrection.