Flygon has just been revealed from SM6a Dragon Storm, which will be released in Japan on April 6th. Thanks goes to Bangiras for the translation!
Ability: Dragon Protection
Prevent all effects of your opponent’s attacks, except damage, done to your [N] Pokemon.
[F][F][C] Sand Tomb: 110 damage. The Defending Pokemon can’t retreat during your opponent’s next turn.
Weakness: Fairy (x2)