Galvantula from Steam Siege has received an errata — meaning The Pokemon Company International made a translation error when releasing the card in English and wants people to play it as intended.
Galvantula’s Double Thread attack currently says: “This attack does 30 damage to 2 of your opponent’s Pokémon. Also apply Weakness and Resistance for Benched Pokémon.”
The attack was mistranslated and should actually read, “This attack does 30 damage to 2 of your opponent’s Benched Pokémon. Apply Weakness and Resistance.”
In other words, the attack is only supposed to target Benched Pokemon.