In Pokemon Omega Ruby and Pokemon Apha Sapphire, Deoxys is available for catching at the end of the Delta Episode, which unlocks once the player beats the main story of the game. First and foremost, they must encounter and capture Rayquaza at Sky Pillar.

How hard is it to catch Deoxys?

Yes, you do have to beat the Elite Four in order to catch Deoxys. ... Your only option is beating the Elite 4 again, because the game saves after defeating/catching Deoxys.

Can you catch Deoxys in the wild?

At the time of the writing of this article, Deoxys can only be obtained when traded with another player. Normally, Deoxys and its multiple forms will appear as part of the Raid Battles. Since it is currently the Season of Legends, the game is focusing more on legendary Pokemon from the Unova region.