My personal picks of the whole thing (in no particular order):
Zero Suit Samus' jet boots: Oh thats fucking awesome! Sakurai just keeps making the Zero Suit more Badass!
Midna assist trophy: EEEEEEE!! I DON'T CARE IF SHES NOT PLAYABLE, SHE GOT IN SOMEHOW!!
Pong Assist Trophy: WHAT?!
Final Destination stages: THIS IS SO GOD DAMN AWESOME!!
Mega Lucario as a Final smash: YES! YES! FUCKING THANK YOU!!
Mega Mans Final Smash: OH MY FUCKING GOD! YES! YES! THEY ALL MADE IT!
Custom Movesets: Holy hell this is wicked! I can't wait to see what changes I can make.
Smash Run made: They took the very best mode of Kirby Air Ride and made it for Smash?
Charizards return: Oh yeah baby! He's back! Whats his Final Smash like?
Greninja makes a splash: …DID THIS REALLY JUST FUCKING HAPPEN?!
This one needs an explanation from me, the last time I played against Daisy head in Pokemon X, my best Pokemon was a Charizard and his was a Greninja with Protean, I swear to god I still feel mindraped.
Mega Charizard X: I FUCKING CALLED IT!!