>>15696510According to Pokebeach, the attack is called Crisis Vine - 120 damage as shown, plus the Defending Pokemon is Paralyzed and Poisoned.
Now, yes, the very high base damage, poison and guarenteed Paralyze may be a strong effect, but remember Articuno EX had the same thing, was in a much better typing and that was perfectly balanced...for EX standards, anyway.
