Well... it is good to know that Jigglypuff will most likely be playable again.
Lucario is one of the possibilities that I thought of as a Pokémon character. My guess is that they will give it a several physical attacks and several energy-based attacks like Vacuum Wave, Focus Blast, Aura Sphere, or Flash Cannon.
Anyway, this makes me wonder just how much information they are holding back. Assuming these characters are playable (which I am 95% confident they are), we have already surpassed the roster for SSBM, and none of these characters are even clones (save for Lucario, which most likely isn't, but we don't know about).