Can Rayquaza mega evolve if you bring it over from an earlier version?

Question

I want to mega evolve my shiny Rayquaza that I brought over to Omega Red. How do I do that?

Answer 1

If you've beaten the delta episode, go to meteor falls and talk to zinnia's grandmother. She will give you the salamencite and if you talk to her again she will teach your rayquaza dragon ascent. Rayquaza can only mega evolve if it knows dragon ascent, as told in the delta episode.