I just fucking noticed that Fennefirefox uses Psywave or Psybeam, Chestnutthing uses Shadow Claw or similar and Froakie uses maybe Close Combat in the trailer.
GRASS/DARK FIRE/PSYCHIC WATER/FIGHTING
NO LONGER YAFF SYNDORME
EDIT: Froakie will evolve into a badass Mr Miyagi frog. Mark my words. He's got the beginning of the fucking moustache right there.