For Little Mac, it's a given that the opponent is going to strike FD. It's just going to happen. So, he needs to pick out of what's left. That happens to be Town and City. Camping out could probably be done there, but it should not be enough to allow time stalling. The section only lasts somewhere between 33-34s (the very first part lasts 28 seconds, though), so any time stalling would be somewhat brief. Just for reference, the other part of the stage with platforms lasts the same amount of time, and the flat, transition period lasts somewhere between 16-17 seconds.
For Duck Hunt, you did make it clear you weren't
entirely sure about the side blast zone, but you still heavily suggested that it does have a shortened one. Err, if you were anyone else, this would have no effect, but people truly take what you say, even if you just "feel" it, to heart. Afterall, you're ZeRo, the person with the reputation of the best Smash 4 player! People trust your intuition. Also, since the video has such a huge audience, I just wonder why you would not do some quick research into that beforehand
.