Deoxys can be found in Pal Park, at the Mountain area. This is a catching area located in the North. You'll have to transfer Deoxys from Emerald/FireRed/LeafGreen using the GBA slot of your DS. You can do this once every 24 hours in Pal Park. When you leave the park, you'll have to re-capture Deoxys on your next visit.
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
No you can't catch deoxys by using cheats
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.
Palkia, Lugia, Dialga, Deoxys, Mewtwo, and Mew
To answer your question, Birth Island doesn't exist in DPP.
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
Deoxys cannot be caught in the wild. You will need to migrate it from the Generation III games to the Pal Park or trade for it with a friend.
You can't catch Deoxys in soul silver
You can't. The only ways you can get a DEOXYS in Diamond are you hack, use an action replay or game shark, or you migrate one from Hoenn and catch it in pal park. Good day to you.
No