well this is easy #1.You need to find some friends with Ruby, Saphire and Emerald #2.Mix records with them all (you need to mix with all 3) #.Then you should have it OH AND KINGDOM HEARTS ROCKS!!!!!!!!!!!!!
First of all It's the Southern Island and You have to have ruby or Sapphire as well. Trade an Eon Ticket from Ruby or Sapphire to Emerald. Now Go to the S.S Tidal and Flash the Eon Ticket and Go to the Southern Island to catch the other Lati.
yea all u got to do is get far enough in the game! if ur talking of the one with latios and latias in it that is
you need the eon ticket by linking with another ruby/sapphire/emerald game. go to a pokemart and on the little paper write "link together with all" and the mystery gift shall open!
go and surf to the southern island until you encounter a wild Latios
First you need to connect to ruby,sapphire or emerald.Then go to a pokemart on the paper write ;link together with all and the mystery gift will show up. That item is a eon ticket.Then go to slateport city and go to the dock.the you will see a lady then they will switch then you will see a sailor . Then you will be off to southern island. Then when you arrive you will see latios for ruby, latias for sapphire
to find the ruby orb you need to go to 1 island go strate and then turn right and then you find team rocket beat them to and go in the cave that's where you find the ruby orb
First you need to go to One island and go into the Pokemon center and talk to celio after beating the elite four and getting the national dex he will ask you to get the ruby now to get it go to mt ember which is north of one island and enter the cave that is blocked by rockets next locate the ruby now to know you found the spot to the ruby there are 2 ways to go at a certain part you go down and you will find the ruby eventually, NOTE you need a Pokemon that knows strength.
for the ruby you need to go on the ferst island and go on the mt.ember you need to surf to get there when you are here in mt.ember go left you'll see team rocket bloking the entres you'll need to battle them to get in.NOTE!YOU NEED TO GET AT LEAST 60 caught POKEMON AND PASS THE POKEMON LEAGED TO GET THE RUBY AND SAPPIRE!to get the sapphire you'll need the ranbow pass to go to the seven island when you'll there check your map and go to the doted hole you'll need to use cut on the door.
Go to slateport city or lilycove city and find the SS Tidal boat show the lady the ticket then choose southern island to reach an island where latios is.
Get two Gameboy Advance SP's and get the link cable and trade, but first you need to get to one island and you need the ruby and sapphire to go into the big machine in the Pokemon centre, you find them on the islands, i think you get the ruby on 1 island and the sapphire 5 island
You need to get the ruby from mt ember then deliver it to celio.
get a mempership card and sleep in the motel at canalave city. when you wake up go to the ferry and then to new moon island. darkrai will be there in a cave. No theres another way, if you have a action replay, go to iron island get on your bike and ride all the right, then just walk around everywhere(you can only do this if you can walk through walls or anywhere else).