you can get deoxys in Pokemon platuim by using pal park or action replay.
it is only avalible by nintebdo event
cheats
Deoxys is a virus that came from space from an asteroid. It has many unknown powers including creating auroras and regenerating.
on sapphire Deoxys can be caught with an aurora ticket to get the aurora ticket mix your records up inside the Pokemon center and a Pokemon nurse will give you the aurora ticket it will let you sail...