Chrono Island

Chrono Island has the Rocket Warehouse, which is now long abandoned, and overrun with Wild Pokemon. There is also a Memorial Pillar, in memory of a boy's dead Onix.
To the far North is Resort Gorgeous, which is home to a girl called Selphy. She is famous for wanting to see random Pokemon every day. Resort Gorgeous is also a great place for a rest or a holiday.
Beyong Resort Gorgeous is the Lost Cave, which is very mysterious, and little is known about it.