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The Secret Southern Island

Southern Island, One of the hidden Islands in Ruby/Sapphire. Unlike Illusion Island, a lot is known about this island. There is an Item called the Infinity Ticket that is obtained in events such as the ones that gave Mew and Celebi away in recent years. Once you have this item, you can go on the boats and go to Southern Island. Once in there there is a small cave

The Secret Southern Island

Here, if you walk up to the Pedestal (you have to have the Infinty Ticket) a Legendary Pokémon will appear depending on your Version...if Sapphire, Latios appears, if Ruby, Latias appears. They are at Lv. 50 Thats is just about everything you can do on this island.: