>>53216865Slowbro works well. Modest max HP, max SpA, Iron Defense, Calm Mind, Stored Power, Slack Off, Leftovers/BrightPowder. Set up Iron Defense 2-3 times, Greninja will wipe all of your boosts, set up 3x Iron Defense, 6x Calm Mind, heal with Slack Off occasionally, sweep with Stored Power. Beware of Night Slash crits.