Yea, L-cancle is very useful for link's down A (sword stab?)
...and another way to wave dash is to point your stick diagonally down and jump then airdodge (like within a second). It's gotta be a pretty tight sequence to work but its helpful in the clutch battles.
Who would you say is your favorite character?
I used to play fox a lot just because of speed and stopping power, but over the last year we've all been putting our characters at random for kicks.

So lately its Mewtwo for me, he's hard for 1-1, but for sniping and easy damage he is unstoppable.