Upsmash is easy, just be ready to air dodge. (another lucas main here, but I was actually on this forum for tips on BEATING snake... so can someone respond with some help to me too
)
Either way his Nair does eat your guard but the Utilt really does blow him out of it so if you see it coming a utilt will destroy it. (I was eating it all night earlier with a friend)
His stick is just good, it's probably one of his best weapons. Ftilt to keep him at bay (BTW, I need help against Ftilts....)
PK fire isn't a full distance projectile so stay back and use Nikita/Grenades.
PK Thunder... if you are on the ground, block it and just charge him with a snake slide. In the air, you really gotta time your air dodge or the tail will hit you... if it does just fast fall and you'll get to lucas well before he ends his long ending animation (and have a free whatever you want)
Hope that helps a little bit, just focus on Utilt alot when he short hops/Dairs because even if it trades you win >_>
So anyway you snakey snake mains... I DESPERATELY need help against snake... as the title implies I play Lucas (I also play Pikachu/Wolf/Toon Link)