Serene Grace

How exactly is it blocked ? also what is your country ?

If ΩRαs Items would just be blanks in XY, but what happens if for example a Permanent Mega Gallade is in a XY box ? would it revert to a normal one ?

Are you using the correct version ?

Yea & Yes. use the move relearner person

you probably screwed up while generating the pokemon

You using the correct version ? and/or are you editing a egg ?

so since Relic Song acted like Mega Evolution, but wasting a turn i was wondering how to make it have the same effects as Mega Evolving pokes such as Mawile, Latios etc.