Why does Crustle defeat Cornerstone Mask Ogerpon Ex?

Brandonusofa

I don't understand why Crustle knocked out my Cornerstone Mask Ogerpon Ex. Cornerstone is suppose to be immune to all attacks from pokemon with abilities. grrrr….

Hades0918

Crustle's attack is the same as Cornerstone's

DoubleCure

It's doing as expected, they can both attack each other.

uncomonfossil

Cornerstone Mask Ogerpon ex's attack hits through effects:

'This attack's damage isn't affected by Weakness or Resistance, or by any effects on your opponent's Active Pokémon'