How to Reach a Second Island in The Sims 2 Castaway (Wii)?

There is no second island to unlock in The Sims 2 Castaway for Wii. The entire game takes place on a single island environment.

Gameplay focuses on fully exploring, surviving, and ultimately escaping that one island. Other titles in the series, like The Sims 2: Castaway Stories on Nintendo DS, feature multiple islands, but the Wii version does not.