Middle starter evolutions

Quilladin — Chespin's evolution. A pure Grass-type that knows the move Mud Shot (super effective against Fire-type Pokémon), can repel attacks with its spikes.
Braixen — Fennekin's evolution. A pure Fire-type that knows the move Psyshock, is particularly effective on opponents that have high Special Defense.
Frogadier — Froakie's evolution. A pure Water-type that knows Bounce, which sends the user into the air on its first turn so it can attack on the second; this move is super effective against Grass-type Pokémon.

Two Fossil Pokémon

Tyrunt. A Rock/Dragon T-Rex which has a new ability called 'Hard Jaw', which increases the attack power of biting moves and knows Crunch.
Amaura. A Rock/Ice Diplodocus which has a new ability called Freeze Skin, which turns Normal type moves into Ice-type moves and raises their power. It knows Aurora Beam.

Three other new Pokémon

Furfrou — A white dog that was seen in the recent Pokémon Direct and is a Normal-type. It can learn Baby-Doll Eyes, a new Fairy-type move debuting in Pokémon X and Pokémon Y that allows its user to go first regardless of Speed and can lower the opponent’s Attack stat. You can also customise its appearance.
Meowstic — A psychic-type cat which has male and female appearances. Moves vary by gender. The male is more of a supporter while the female is more of an attacker; the female knows Extrasensory and the male knows Miracle Eye. It has Keen Eye or Infiltrator.
Pyroar — An evolution of Litleo, it's a fire and normal-type Royal Pokemon with abilities such as Rivalry and Unnerve. It can also unlock Normal-type move Echoed Voice, and comes with male and female appearances.

Fairy Type chart

Reportedly, Fairy is Super Effective on Fighting, Dark and Dragon and not effective on Fire, Poison or Steel. Is weak to Poison and Steel while resists Fighting, Dark and Bug. It is immune to Dragon.