Route Sixteen; Ashdew Rapids

South of Blacktide Glen lies the fastest rapids in the region, caused primarily by whirlpools that underwater cavern Pok?mon cause. In order to pass through here, you'll need the HM Whirlpool. Or, if you have it, you may use HM Dive to go beneath the waters' surface and into the caverns; they lead straight to a surface zone that will take you to the same destination as these speedy waves.