a wavedash is an airdodge into the ground at an angle. looks similar to a roll but it goes further, its faster, and there is no lag after a wavedash enabling you to do any attack after one.Originally Posted by andrewguy
prime examples of characters that MUST utilize the wavedash in melee to be competative are luigi and ice climbers
luigi has the longest wavedash and uses it to tech chase and does it into downsmashes effectively
ice climbers also have a long one and use it to get into grab combos or their powerful smashes.
hope that helped