Rayquaza does not have an in game ability. 

Type Name Chance Power  Description 
Red Miss 4
White Break Energy 28 60 Your opponents Energy Plate-based effects are lost 
Red Miss 4
Purple Fly 28 ⭐⭐⭐ This Pokémon jumps over the battle opponent and lands 1-2 steps away
Red Miss 4
Gold Extreme Speed 28 120