I have a Rayquaza, and I think a Sky Plate would be perfect to pump up the Dragon Ascent attack but I don't have one. I want to know where I can find it. I know sharp beak also has the same effect, so one of the two will be enough. Thanks.
The Sky Plate, in ORAS, is found on Route 124.
In eastern path in area found by diving in north east, following the path and diving again.
The Sharp Beak however, is found on the SS Tidal.
From Backpacker.
Or on the following Pokémon;
The Sky Plate can be found on Route 124, while a backpacker on the SS Tidal will give you the sharp beak when spoken too.
Source: http://bulbapedia.bulbagarden.net/wiki/Plate and http://bulbapedia.bulbagarden.net/wiki/S.S._Tidal
