Kirby has a wavedash

[CaliburChamp]

Make Kirby's D-air land on the ground, with the first few start up frames, then move control stick to left or right, depending on where you want to slide to. It's more like a wave landing, than wavedash. It can actually be a bit useful for spacing.

 

[momochuu]

This is known. All of his aerials do this, and it's not very useful.