You can catch Deoxys in Pokemon Emerald version at a Place called Birth Island.
You have to have a Birth island pass card to go there first of all you can get that with cheats but to get it you have to talk to an old man in moss deep city and he will give you the pass but you also have to talk to a sailor in slate port city and he will Tell you a story about an island in his past and he will say he saw a Pokemon strange as his eyes could see attacked him as he tried to catch it in a game he thought was tag then he will say you look like a Pokemon trainer yourself would you like to go for a ride to the island for you self you answer yes on no and if yes he will take you there.
Deoxys will be a little triangle sitting on the island the triangle will move and you have to find it five times the it will transform into Deoxys after he gets tired of you getting him and he will attack you and you will go into battle.
When i caught him i didn't have a master ball but i had 30 ultra balls. he Will battle you at level 30 and you should bring a psychic type or an electric type with you that has the move of hypnosis or stun spore and use it on him and he will be more easy to catch but try not to bring legendary Pokemon with you or any strong Pokemon above level 45 or he will be easy to defeat and he will flee.
P.S. if you have a rare or even shiny Pokemon in your party deoxys will be shiny when you fight him.
go to any map erase the number after M= and type 80 you are at psychic elemental map and he/she randomly appear mew-two does also!!
my account is hannahmariemarie full mewtwo^^
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there isn't a code. deoxys will appear very lately in the game. so id say late night
In order to get Deoxys, you must pass all bonuses with all playable Pokemon in Rayquazas Balloon Panic.
in cavren zone
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That's cavern*, and that's also incorrect. To find Deoxys, you have to play and set a record with every pokemon in the circle, on Raquayza's Balloon Panic.
birth island
Rayquaza is in route
131
You find him in spring path
prany i dont know
it depends in its element....
just wak in the maps and you will find it
There is only rainbow ponytas' in Pokemon battle arena, you can get them and find the rarely on route 7.
Any unevolved bug type pokemon.
you cant get him in ruby,sapphire or emerald
You Can Get It At Battle Arena After You Beat The Game.
the only way is to use credits.
I am trying to find out too...
on the cloud map(you must buy it first)
Deoxys.