Chansey Neo Destiny & Pinsir Aquapolis: what's the true?

[decca]

Hi folks,
I've a deck whit two Chansey Neo Destiny and one Pinsir Aquapolis

They boot have an attack that says "Flip 2 coins. If either of them is tails, this attack does nothing. "
Now, I'm Italian and in the Italian translation they sounds like "whit two tails this attack does nothing" that means you need just one head to have success.

My friends (and a post on a doubtable nonofficial Italian site) say that the translation is wrong because in that way this cards are too much strong (basic pokemon - damage 80 and 90).
They say that "either of them" means that you need two heads to perform the attack.:complain:

What's the true?

 

[Palbert6393]

You need 2 heads to be sucsessful. Either means one or the other, so if coin1 is tails and/or coin2 is tails, the attack does nothing

 

[Politoed666]

What Palbert said.

If 1 or more coins is tails, the attack fails.