you go to a Pokemon Rocks USA
Deoxys.
This is not the way to catch Deoxys in Pokemon Emerald. You need an Action Replay or Gameshark in order to catch Deoxys.
you need a gameshark code
deoxys can be found on birth island only by having the aurora ticket.
deoxys are on birth island and you shauld have af aura ticket
in Pokemon pearl or diamond, you cannot find a legit deoxys. you can only get one in Pokemon emerald, firered, leaf green by visiting birth island.
You can't find one you need to trade one from FireRed/LeafGreen/Ruby/Sapphire or Emerald
Legendary pokemon you can find in emerald are (without cheats & events) Rayquaza, Groudon, Kyogre, Regirock, Regice, and Registeel.You can get latios OR latias in pokemon emerald too.rayquaza,kyogre,grouden,jirachi,deoxys and i think mew
There is a gameshark code for Pokemon Emerald that lets you battle Deoxys anywhere, I think you find it at www.gameshark.com. Otherwise, you need to go to Birth Island.
YOU CAN'T FIND IT! Deoxys is one of the rarest Pokemon to get. If you go onto GTS a lot of the trades are for Deoxys because everybody is desperate. There hasn't been an event to get Deoxys. Luckily, to get the trainer card star for completing the National Dex, you don't need to capture Deoxys and a few other annoying Pokemon. The only way to get Deoxys is to: Wait for an event. Transfer from Emerald. Get a trade.
Yes if you have an aurora ticket.
after completing everything possible and getting all the stars on you trainer card go to mossdeep and fly to the moon. There you will find Deoxys and Jirachi.