I'm really not sure what else to say. Shaky and I were practicing it awhile ago and if I used Marth, I HAD to walk forward, no small tiny step, like full out walk. Yeah you don't just hold away iirc....I wish there was a thread, I know K Prime talked about it but I have no idea where that thread is.
Unless DDD's pivot grab is bigger than that (though, that looked maximum) then with the extra inch that shouldn't work.
But yes, this is not really something I personally as a Ness should be too worried about in an already disgusting matchup haha. I'm far more afraid of Marth just...walking over and grabbing me than DDD doing this.
Also @Doc King: If you mean the DK Cargo Grab for Ness, no, it's not like that at all so I hope you're not referencing that...