You will need to use an Action Replay, transfer it from Ruby, Sapphire, Emerald, FireRed, or LeafGreen, or trade it from a friend who has it. It cannot be found during normal gameplay.
No, you can't catch Deoxys on Pokemon Diamond & Pearl unless you have cheats. You can transfer it from your GBA to Pokemon Diamond and Pearl though
you cant, get a action replay
no way!
you can get him in a trade from GTS or use AR OR you can get him in a event.
Not without trading some one with a deoxys or using a hack
You catch deoxys at birth island.
You can't catch Deoxys in Silver..
you have to get more then 45 gym to catch legendary Pokemon! deoxys is a legendary Pokemon
You would need to use an Action Replay or transfer it from Pokemon Emerald, FireRed, or LeafGreen, for it is impossible to catch Deoxys in any location in Pokemon Diamond, Pearl, and Platinum.
You can't catch Deoxys in soul silver
nope you have to migrate Pokemon to get it
No you can't catch deoxys by using cheats