Yes if you have an aurora ticket.
This is not the way to catch Deoxys in Pokemon Emerald. You need an Action Replay or Gameshark in order to catch Deoxys.
Deoxys.
You must obtain Deoxys from Birth Island in Emerald.
deoxys can be found on birth island only by having the aurora ticket.
you need a gameshark code
you can only get deoxys in an event
It is not possible to get Deoxys without the Aurora Ticket for you can only find it on Birth Island.
deoxys are on birth island and you shauld have af aura ticket
to find deoxys , you have to get an arora ticket and go to the island
To get deoxys you have to migrate for emerald or trade.
you go to a Pokemon Rocks USA
It is rather unfortunate that you can not get Deoxys in Emerald, however, it is possible if you go to a Nintendo Event.