Katy Parry
The Only Zelda in Indiana
I think Turncancel/Turn around cancel is a better name, because you are canceling the turn around animation. You really shouldn't be trying to "coin" your own term just because you're the first person who posted the video onto smashboards. (waits for "Oh, I wasn't trying to do that! I was just trying to think of a term that would better fit the community/make more sense/sound better/etc.")Still... We can see Mario doing it, and I doubt something like this would be glossed over. They intentionally made it easy to do, else they would have caught it, unlike Wavedashing
Furthermore *sigh* wavedashing was intentionally left in the game. Sakurai stated this. He wanted people to able to keep the momentum when landing. Sure, he didn't expect it to be used in the manner it is currently used, but it was intentional.
What if you approach with a dash and someone rolls behind you? Dash > Turncancel > Ftilt/FsmashInteresting. But, I'm not sure how you'll use it that well. See, you could just poke with the forward tilt normally. You don't need to run back in that regard. I guess it lets you do an attack out of running but you can only do it if you're running away from an opponent not towards them. It's link of like stutter shot in Awesomenauts. It's nice, but you can just play without it and do fine.
For you to normally do something like that in Brawl/PM, you'd have to wait for the turn around to be complete, otherwise you'll just dash attack.