Deoxys is available after completing a puzzle at birth island this island is only accessible if you have the Aurora Ticket.
you cant
deoxy is unavalible is Pokemon soul silver unless a Pokemon envent,trade, or migrateNintendo Event...
No. It must be traded from another game- such as Saphire/Ruby, FireRed/LeafGreen- where it was only available as an event pokemon.
:-( No. You can get him after you beat that ranger net mission about deoxys. BUT, when you beat him in the mission, he/she ranger sets it free. so u can't have him. :-(