Some leaked information about Hawlucha and Klefki, courtesy of Tumblr:
Hawlucha apparently learns a new Fighting-type attack called Power-Up Punch which hits for 40 BP and raises Attack stat by one stage, and according to the post I saw on Tumblr I found this image on, they said it's the TM that Korrina's Gym gives out. They mentioned "third Gym" so that all but confirms Korrina's Gym is the 3rd Gym. Hawlucha also learns a brand-new Flying-type attack called Flying Press. And it's also revealed to learn Fly and Roost. It has Unburden as its ability. The stats show Hawlucha will be very fast (has high Speed), but also be a good physical attacker.
Klefki's stats appear to be quite balanced, but it's slightly more better in the defensive department given its highest stats are shown to be Defense and Special Defense. But still, they aren't that big of a gap compared to the offenses and Speed. It's been revealed to learn a new Fairy-type move called Crafty Shield, which protects it from status moves. It also learns Torment, Mirror Shot and Foul Play. It has Prankster for its ability.