Stage
Trophy
Item
Character Select Screen/Menu something or rather.
Advanced Technique (the new and improved pivot pivot grab, and reverse pivot pivot reverse falcon punch on little mac)
(STICAT~ nyaa)
Brawl dojo days had a lot more updates pertaining to technical details and non-game visual details.
Confirming things like pivot grabs, or even dash cancels or the likes would be huge-ish, because it would be an indication of the transition between "things in the air" and final engine details being revealed.
I'm pretty sure he dedicated a post to footstooling for this generation, so its not like its unheard of