I found all if this on pokejungle.net, this supposedly came from someone who is associated with pokemon X and Y, not sure if its all official but the immense details given make it seem believable:
“Due to the “world wide” release of Pokémon X/Y, pre-release information that at this time would usually be reserved for the Japanese branch of the Pokémon Company is now present among the localization departments of the other regions as well (such as NOA, where I am situated), and I have actually seen the full roster of new Pokémon as have quite a few people worldwide due to the difficulty regarding keeping everything under wraps. Thus, I can share a bit of preliminary information about new Pokémon appearing in X/Y.
-More than 100 new Pokémon.
-There are indeed new evolutions and pre-evolutions, most of them focused on Gen V Pokémon However, a few older Pokémon, including Gen I classics, are getting surprising new developments.
-No new types, but there are “Cross-bred” Pokémon introduced. Certain father/mother breeding pairs will result in a visually distinct child, who will be the mother’s species, but will, for example, have a pattern reminiscent of its father or a slightly altered color scheme. This is basically the new Gender Difference and is simply an aesthetic bonus, nothing extreme and only certain pairings result in this…the Pokemon is still considered the species of its mother, it’s not a new species. One example I can give is that it is possible to get certain Pokemon sporting Pikachu’s red cheeks.
-The Starters become Grass/Steel, Fire/Psychic, and Water/Electric. They’re inspired by various European-centric archetypes…Chespin becomes a knight with chestnut armor, Fennekin a wizard with a majestic fur cloak, and Froakie a Nordic Viking with a thunder-cloud mullet/beard.
-Xerneas is Ice/Steel, and Yveltal is Fire/Dark. They have a unique ability where they can shift types with each other, Xerneas becoming red and Fire/Steel, and Yveltal becoming blue and Ice/Dark. Supposedly, Game Freak chose the typings in part due to members of the team being fans of R.R. Martin’s A Song of Ice and Fire, among other reasons.
NEW POKEMON:
Normal: Kendama-based Pokémon. Its main body rides atop a giant ball.
Grass: A black-bear whose body is made of berries.
Fire: Pintata Bull with horns that are torches.
Water: Sea-bird. Looks like a socialite due to a feather that looks like an ascot.
Electric: A poodle whose fluffy-parts are statically-charged fur.
Bug: Millipede, besides the head its long body is made of bubbles
Flying: A peacock with a tail that’s a harp.
Steel: A female-like Pokémon whose long hair is made of long, steel cables.
Rock: A rock-based snail, its got a bell for a shell, and its body looks like a cathedral.
Ground: An elephant whose body is covered in hardened mud-armor, more realistic looking than Donphan.
Psychic: An “Arabian” Pokemon wrapped in a brightly-colored carpet clothing.
Dark: Raccoon. Its tail serves as a burglar sack, and it’s got a stylish black mask.
Poison: Little purple lizard, it swings its (very large) broken tail around like a huge club.
Fighting: A very weird Pokémon who resembles a giant, living sneaker. Cooler looking than it sounds.
Ice: A Snowman with coal on its head looking like the incense marks Shaolin Monks have.
Ghost: A kasa-obake (umbrella ghost) that’s brightly colored and “fancy” looking.
Dragon: A Kirin that looks like a dragonic-unicorn.