You can't. You can only catch deoxys in Pokemon firered leafgreen.
NO. All the rumors you hear about going to the moon to catch Deoxys is completely and utterly FALSE.
Deoxys
You can not go into space on any Pokemon game, dispite what others may tell you. Going into space is one of the BIGGEST lies anybody has made up for Pokemon games. You can ==only== catch Deoxys at Aurora Island. You can get here by going to a Nintendo Event in REAL LIFE Japan, or by using a Gameshark/Action Replay.
to get deoxys you get a ticket to some sort of island then you keep chasing the triangle rock until it gets into the midle then it explodes and deoxys comes out then you catch it and your done.
the space thing is a rumor to get deoxys, you can use a gameshark to warp or use the battle deoxys code
In emerald you can catch deoxys and jirachi but your internal battery needs to be working if it is keep going to the space center until they get to rocket launch 99 then talk to the dude that tells you which one there on and he'll ask if you would want to go on 100 if you do you can catch jirachi and deoxys if not you can catch celebi the same goes for ruby and sapphire hope this helps
go to the space center and dnter the spaceship
it depends on when you get on but i believe you can go up and catch iether deoxys or jirachi but im warning you if you try to do it again on the same Pokemon you wont be able to do it even if you restart!
You catch it by getting a ticket or a mystery gift and then you go to the spaceship area and then you get on number 10 after that your have to find it in space. Good Luck!AnswerActually Deoxys is number 50 and Jirachi is number 100, you can also get deoxys by getting aurora ticket and jirachi by trading from Pokemon channel to ruby/sapphire then trading to emerald.
neither, they are all easy to catch. save it to catch deoxys or jirachi. Wait 50 weeks (50 launches and get on the rocket to the moon at the space center).
On the Pokemon games (due to a glitch), you can go to the moon and get Deoxys from the Space Center in Mossdeep City.