Has the first post been updated with all of the stuff that has been brought up in the thread? I've read through a few times in the past week and I'm really confused now about what is what? There are a lot of names being thrown around. Pivot walk, boost pivot, boost walk, boost smash, Zero Acceleration Boost Pivot Walk Dash.
On the replay where fox slides his jab at the marth, a replay is just a recording of all the button inputs and when you watch it in-game it just takes those inputs and relays them through a "match". Is there a way to decode the replay files to look at the raw inputs? I would think some of the hackers working on B+ and would probably be a good choice.