oh god I killed deoxys and saved what have I done
You can still catch Deoxys. Go to Mosdeep space center and the two people upstairs will tell you that there are traces of Deoxys at the Sky Pillar. Go back to the Sky Pillar and all the way up is the triangle. Click on it and Deoxys will re-appear there.
On the other hand, I have two 6 IV Dittos Adamant and Modest (Modest one is shiny). If anyone needs me to breed anything and have 5 perfect IVs for them, I'll be happy to help. Also, Deadface is awesome because he has helped me get so much progress in my game. I've been able to catch every legendary that is possible to catch in this game except for the Regis (which I'll be doing momentarilly) thanks to his help.
Got 5 IV Treecko, Torchic, Mudkip, and Feebas (Deadface gave me all of them except for the Treecko) atm and probably going to be breeding a lot more. Any suggestions?
My team when I beat the Elite Four was:
Sceptile
Dusknoir
Golem
Kyogre
Latias
And the last one was irrelevant. (filled in Mespirt or Azelf not sure which because they were my highest levels at the time.)
Current team I plan on using for the second Elite 4 battle (they have higher leveled and different pokemon after Delta Episode for those who don't know)
Sceptile
Blaziken
Swampert
Metagross
Dusknoir
Latias