Any damage done to Altaria ex by attacks from Stage 2 Evolved Pokémon (both yours and your opponent's) is reduced by 30 (after applying Weakness and Resistance).
Attack: Dive
Damage: 20
Attack: Dragon Mist
Damage: 70
This attack's damage isn't affected by Resistance, Poké-Powers, Poké-Bodies, or any other effects on the Defending Pokémon.