It says "Mega evolving Rayquaza will not be possible" in the OP. You can use Dragon Ascent, you just can't Mega Evolve.Something I'm curious about is does this mean Dragon Ascent is banned, or is it still usable by Base Rayquaza in Ubers? Since technically you could go the entire battle without pressing the Mega Evolution button. That said, Mega Stones have been banned rather than the capability to Mega Evolve and Dragon Ascent is essentially the equivalent to a Stone. But of course, it's different in that it's a move.
So I just have to ask if it's Dragon Ascent or the capability to Mega Evolve Rayquaza that's banned. I won't really mind either way, just seeking clarification.