You can't catch Deoxys in Pokemon Diamond, but you can migrate it from Pokemon Emerald, FireRed, or LeafGreen. Or you can cheat using an action replay, but I don't know how. If you do migrate it over from a GBA Pokemon game, be sure to take it to Veilstone City and take it to the meteorites there. There are four of them. Each one can change Deoxys's form (Normal, Attack, Defense, and Speed Form).
Deoxeys is a pure psychic type
it tells you how
you have to trade from pearl
You can only get Deoxys through a special event.
you have to get it at an event or get an action replay
in a Nintendo event
solacoen ruins
You can't unless you are using a cheating device or migrate.
BY HAPPYNESS IN DAY IF IT is umbroen is in night
You can either import him from a previous game or use an Action Replay.
yes it evolves into deoxeys stupid dur your a <(") penguin
above jubilife city in the grass by using Pokemon Radar