[imgz19]http://www.serebii.net/omegarubyalphasapphire/5.jpg[/imgz19]
[imgz19]http://www.serebii.net/megarayquaza.jpg[/imgz19]
Mega Rayquaza has been revealed. It has a new ability called Delta Stream which creates a new weather effect that removes weather and makes moves of a type that Flying-type Pokémon are usually weak to will only deal normal damage to any Flying-type Pokémon in the battle. It lasts as long as Rayquaza is in battle
Trailer also shows a move called Dragon Ascent which is said to be the most powerful Flying-type move
The reason why Mega Rayquaza is a Mega Evolution and not a Primal Reversion is to be explained in the story. It will also Mega Evolve through a way different to other Pokémon
source serebii
trailer
[urlz19]https://www.youtube.com/watch?v=WPQg3lSvWc4&feature=youtu.be[/urlz19]