Sludge Wave (Japanese: ヘドロウェーブ Sludge Wave) is a damage-dealing Poison-type move introduced in Generation V. It has been TM34 since Generation V.
Sludge Wave inflicts damage and has a 10% chance of poisoning the target. Sludge Wave will hit all Pokémon in Double Battles and all adjacent Pokémon in Triple Battles.
Prior to an update to Niantic's servers on July 30, Sludge Wave had a power of 60.
Gengar may only know this move if it was obtained before August 20, 2016.