Robin
He has two swords, the magic and the non-magic one. (Forgive me, not an awakening veteran).
All of tilts are using the physical sword. They have good combo ability. All of his smashes use the magic sword, which has an electric effect.
When in the air, if you use the inputs for a smash attack (and you still have the magic sword available), you will do an aerial that uses the magic sword. If you just typically hit an aerial he will use the normal sword.
You use up your magic sword quite quickly but it regenerates rather fast so it's not like it ruins your tempo. Very fast.
The fire move we've seen is actually a fireball that comes from above robins head and rains down in the vicinity in front of robin. His neutral b shoots and electric lightnig bolt straight across the stage.
The healing move is his down b and you would be surprised to know it heals for a LOT (I healed for about 20%) and it stuns your opponent while you heal. It has a start up though so it's not as easy to land as any regular grab. I can see Robin being a PAIN IN THE ASS to people who can't avoid getting caught in it. Unsure if you can force break it from slapping buttons, I only played AS him.
His up b jumps up a bit and shoots wind slicers down. Important to note it's actually not straight up, he jumps jump and slides slightly to the side in the direction you're facing THEN shoots them down, so it can be a ground option too.
Marth feels very nerfed. His range seems even worse than in Brawl (I was whiffing fsmashes like crazy and I'm pretty good with tippers). Aside fr his range and no ability to double fair he seems mostly the same, aside from running faster. It's his range that REALLY feels kinda killer to His melee/brawl play style.
Tipper ing with Marth seems to require your opponent to be a lot closer than ever before, it seems he won't be as much of a spacing monster as he's always been.
This can't be overstated enough, his range feels significantly shorter (by significantly I mean that it's noticeable. It's all relative of course), and seems to be his most notable nerf. Spacing his tippers seems to Be considerably more skill-based due to the range needed.