it just like the conference trailer, where they show Link and Zelda taunting (Link with Navi, and zedla with some magic effect thingy), they just did it at the smae time so it looks like they are doing someting together (like Navi healing Zelda, like the pink fairies do), it is probably just a no moving effect, like Diddy looking left and right)
here are all of Lucas's moves that have been shown.
Fair or Bair
Dair (or Second Jump???..mmm...not likely, but it has to be mentioned
, but I think it is indeed his Dair)
Special , Taunt, or UpSmash
Forward Smash
Special or Fair (in case the kick is his bair, but the possibility of it being a special is still big, as the attack looks like is continuous)
Grab move
Taunt or Automatic standing-doing-nothing action
Taunt