The promo articuno's attack is diamond dust. it say's "Flip a coin. if heads, the defending pokemon is now paralyzed, and this attack does 10 damage to each of you opponent's benched pokemon." So does this mean if I flip tails, does it still does 10 damage to each of the opponent's bench. I need this answer because some of my friends agree, and some disagree with me and it confuses me and my rain dance.

Flipping heads will give 2 results:

#1 - Defending Pokemon is paralyzed
#2 - Opponent's Bench takes 10 each.

Flipping tails will yield neither of these results.