You need to get an Eon Ticket, but Eon Ticket is obtainable only by attending to a Nintendo Event, but that event isn't present anymore these days... But you can still trade one from a friend who attended the event... But if you don't know someone who has Eon Ticket, then your only choice is to cheat... Try searching for cheat codes to get Eon Ticket...
choose red orb when you are at the ghost mountain
A Game Shark is the only way
in southern island there was latias and latios you will meet latias in Pokemon sapphire and latios in Pokemon ruby
in my pocket
You can only get to Southern Island by having the Eon Ticket from a Nintendo Event.
get an Eon ticket!!
You probably mean southern island not southern cave because southern cave does not exist, southern island is an island you can only venture to on emerald and not ruby because of the eon ticket.
This island is only available if you have an eon ticket.
You don't. You can only get to Faraway Island in Southern Hoenn, during Pokemon Emerald.
Six island its a cave in the southern portion of the island.
go to 8 island and find aten and he will take you there
In Pokemon Sapphire, Latios can be found in Southern Island.