Greninja

It creates throwing stars out of compressed water. When it spins them and throws them at high speed, these stars can split metal in two.

Ability — Water Shuriken: Once during your turn (before your attack), you may discard a Water Energy card from your hand. If you do, put 3 damage counters on 1 of your opponent's Pokémon.

Mist Slash (50): This attack's damage isn't affected by Weakness, Resistance, or any other effects on your opponent's Active Pokémon.