Wing dashing is an advanced technique discovered by kupo15 that can only be used by Pit. It is the input of four moves in rapid succession to produce a motion similar to that of wavedashing, although it is more difficult to make a wingdash go a similar distance .
To wingdash, the player must input a short hop or a jump, then activate Wings of Icarus. While using Wings of Icarus, the player must press left or right based on the desired direction, then perform a down aerial. If done correctly, Pit will slide in a way akin to a wavedash with zero lag thanks to down aerial's autocancel. As a result, the technique can be used for spacing and movement quite effectively. Given the requirement to input a down aerial, this can also be used to pick up items without committing to any animations. It can also be used to escape some attacks.
Due to the properties of Wings of Icarus, it's possible to land immediately after using it from a grounded state. This can be done by tapping up and immediately using down aerial. If done during the turnaround animation, there can potentially be no lag at all.