Mimikyu vs Cornerstone Oggerpon

Asymptoeman

Was just in a game and a Mimikyu was able to deal attack damage to my Cornerstone Ogerpon even though it has an ability. How is this possible?

TeamAbra87

Mimikyu deals damage counters, rather than damage. Damage counters get through things like Cornerstone's ability.

Other cards that deal damage counters include Dragapult ex and LOR Sableye. It's kind of a confusing distinction.

Xeze

That's because Mimikyu's attack doesn't deal damage, it places 7 damage counters as an effect of the attack. Cornerstone Ogerpon's ability only prevents damage from attacks, not effects.