You must trade from another game.
Deoxys.
I have no Idea about it on Ruby But I do know its on emerald. But My brother was talking about Deoxys on Ruby so Its a 50/50
regis groudon rayquaza latios and latias deoxys
you really can not get deoxys in Pokemon ruby but you could get a gameshark and hack and i think you need aurora ticket
For Deoxys,go to Mossdeep Space Center.If you see a man that says the world "Moon"go to the Space Ship.In the Moon you will find Deoxys.If this is fake,you need to trade from Emerald.To Jirachi you most trade!
Theres been rumors that you have to fly to the moon to fite him but the only way to get deoxys is to trade him from leaf green or fire red. Theres been rumors that you have to fly to the moon to fite him but the only way to get deoxys is to trade him from leaf green or fire red.
no ... well if you cheat you can and you can get deoxys but you have to have 6 badges i think cos you need 6 to get to mossdeep and that's were the space station is
you catch latias[saphire] or latios[ruby] or both[emerald]. than you trade train them to level 57 and talk to the man that says launch 57 success!!!!at lilycove city. he will tell you you can get on the next space ship. than the screen goes blank for a few seconds and oyu are on the moon than go find deoxys because if you run of kill it you can never go to the moon again!!!!!!!!!
You cannot find Mew, Celebi, Jirachi and Deoxys in Pokémon Ruby. Mew, Celebi, Jirachi and Deoxys are event-only Pokémon. Jirachi was available on the pre-order disc for Pokémon Colosseum that would allow you to download Jirachi from the disc over to Pokémon Ruby.
You cannot catch Deoxys or Jerachi. They are obtained via a Pokemon event.
You can't find one you need to trade one from FireRed/LeafGreen/Ruby/Sapphire or Emerald