You can only catch it in Pokemon FireRed, LeafGreen or Emerald provided you have the ticket that allows you to get to the island, you can catch it as a wild Pokemon in Omega Ruby and Alpha Sapphire, you can use an Action Replay in order to enter a cheat code into the device so that you can receive one or you can trade for one however games prior to X and Y can only trade locally.
you can only get deoxys in an event
Deoxys cannot breed.
Deoxys was created in 2004.
Deoxys is not a wild Pokemon in SoulSilver. Deoxys has to be traded into the game in order for you to get it. Deoxys can also be received by event, and one recently took place in Japan for Deoxys.
When you catch Deoxys it is level 30.
By migrating Deoxys or an event.
Deoxys Can't Breed!!
Deoxys is located in Birth Island.
Deoxys...
There is no deoxys fossil. To obtain Deoxys in any of the games you have to get it through an event or through cheats.
You don't get a Shiny Deoxys from a man. You'll need to get Deoxys in Pokemon FireRed, LeafGreen, or Emerald. It is extremely hard to get a Shiny Deoxys.
Deoxys is number 386 in the National Pokédex.