Get ready to see a change in your EX Raids!
Just like in Deoxys’s fashion, this Deoxys changes forms and you can expect to see that in Pokemon GO. Starting on December 20th, Deoxys will be in his Attack Forme in EX Raids. Those who receive any EX Raid Invitations will see a Deoxys that will be hitting much harder then before. Granted, it will come at cost of low defenses.
Best in luck with getting an EX Raid Invite! And taking down this tough opponent!