Wall of Pain (WoP) is a Jigglypuff strategy of constantly barraging your opponent with aerial attacks, while abusing its incredible horizontal maneuvering. Each attack should go forward in the air, then once you hit your opponent, back to where you started. This allows for quick attacks and keeps you out of range from any retaliations. One of the main reasons why Jigglypuff moved up in the tier list is because of this technique.