Here's why:
* Newmoon Island is in Pokemon Ranger and Shadows of Almia: Darkrai is not featured in this game.
* Darkrai is a legendary Pokemon: While its location varies in different games, it's usually found in specific events or locations associated with its dark and dream-related themes.
If you're thinking of a specific game or event where Darkrai might be found, please provide more context, and I can help you further.