User blog:Skull26374/Pokémon X and Y News (CONTAINS SPOILERS)

New Pokémon

 * Chespin (Grass) -> Quilladin (Grass) -> Chesnaught (Grass/Fighting)
 * Fennekin (Fire) -> Braixen (Fire) -> Delphox (Fire/Psychic)
 * Froakie (Water) -> Frogadier (Water) -> Greninja (Water/Dark)
 * Eevee -> Sylveon (Fairy)
 * Pancham (Fighting) -> Pangoro (Fighting/Dark)
 * Fletchling (Normal/Flying) -> Talonflame (Fire/Flying)
 * Skiddo (Grass) -> Gogoat (Grass)
 * Helioptile (Electric/Normal) -> Hetliolisk (Electric/Normal)
 * Scatterbug (Bug) -> Spewpa (Bug) -> Vivillon (Bug/Flying)
 * Noivern (Flying/Dragon)
 * Clauncher (Water) [X only]
 * Skrelp (Poison/Water) [Y only]
 * Litleo (Fire/Normal) -> Pyroar (Fire/Normal)
 * Flabébé (Fairy) -> Floette (???)
 * Honedge (Steel/Ghost) -> Doublade (Steel/Ghost)
 * Inkay (Dark/Psychic) -> Malamar (Dark/Psychic)
 * Swirlix (Fairy) -> Slurpuff (Fairy) [X only]
 * Spritzee (Fairy) -> Aromatisse (Fairy) [Y only]
 * Dedenne (Electric/Fairy)
 * Bunnelby (Normal) -> Diggersby (???)
 * Furfrou (Normal)
 * Tyrunt (Rock/Dragon) -> Tyrantrum (Rock/Dragon)
 * Amaura (Rock/Ice) -> Aurorus (Rock/Ice)
 * Espurr (Psychic) -> Meowstic (Psychic)
 * Binacle (Rock/Water) -> Barbaracle (Rock/Water)
 * Hawlucha (Fighting/Flying)
 * Klefki (Steel/Fairy)
 * Goomy (Dragon) -> Sliggoo (???)
 * Carbink (Rock/Fairy)
 * Pumpkaboo (Ghost/Grass)
 * Xerneas (Fairy) [X only]
 * Yveltal (Dark/Flying) [Y only]

Mega Evolutions

 * Venusaur (Grass/Poison)
 * Charizard X (Fire/Dragon) [X only]
 * Charizard Y (Fire/Flying) [Y only]
 * Blastoise (Water)
 * Gengar (???)
 * Kangaskan (???)
 * Aerodactyl (???)
 * Mewtwo X (Psychic/Fighting) [X only]
 * Mewtwo Y (Psychic) [Y only]
 * Ampharos (Electric/Dragon)
 * Blaziken (Fire/Fighting)
 * Mawile (Steel/Fairy)
 * Absol (Dark)
 * Lucario (Fighting/Steel)
 * Abomasnow (???)
 * Garchomp (Dragon/Ground)