Go to birth island and move the block around. It will turn red when it is about to make you and deoxys battle.
First you got to catch him in Pokemon leafgreen or fire red and trade. Or you can use a gameshark. it lets you catch all the Pokemon from bulbasaur to deoxys.
you cant.
Mauville city!
you get torchick by migrating from ruby, sapphire, or emerld
you bring it to the scientist at the museum
Because of the acid from "Emerld green" (arsinec)!
cant cant cant
YES geez how many times are you people going to ask this question!?
You can get Deoxys in Pokemon FireRed, LeafGreen, and Emerald by using a GameShark, for the Nintendo event has expired. You will need to look up a code for the Aurora Ticket to travel to Birth Island or ask a friend if they have it to trade with.
Get the Old Sea Chart and go to Faraway Island.
After beating the game it will appear northeast from pacifidlog town.
you can only get deoxys in an event