You have to get it from some special event hosted by Game Freak (in reality, not in the game). Since all of those for the R/S/E series are long over with, you'll have to get latias from a friend with either sapphire or emerald.
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Aurora ticket is only avaible in leaf green, fire red and emerald. But not ruby or sapphire.
You cannot, in order to get Deoxys you must trade.
The cold for Mystery ticket is a866745f121c.
you really can not get deoxys in Pokemon ruby but you could get a gameshark and hack and i think you need aurora ticket
In Ruby and Sapphire, you cannot get Deoxys without trading it. In Emerald, FireRed and LeafGreen, you need the Aurora Ticket, which is an event item. The only way to get an Aurora Ticket now is by cheating.
you have to get the aurora ticket from a Pokemon event in japan. then you give the ticket to the ferry person and he takes you to Birth island.
go to www.pokemonruby/cheatsheet.com for some cool codes. [p.s] the only way to get an aurora ticket in Pokemon ruby is to either use an action replay or a gameshark. you cannot trade it from firered/leafgreen because it is a key item.
For me i got the Aurora Ticket in the Lilycove Super Mart (Lilycove Department Store) 3rd Floor the lady behind the counter (left lady).she has it on sell for $60000
You must have the Aurora Ticket to go to the island which Deoxys is on. (This ticket can only be obtained by cheat devices and Nintendo Events.) When you get to the island, you will have to solve a puzzle. After that you will face Deoxys.
NoA Event or Action Replay/Gameshark codes. NoA Event = Nintendo of America Event
You cannot get the Aurora Ticket from Professor Oak. The Aurora Ticket is given to the player by a Nintendo event distribution. These events for the ticket are sadly no longer being held.