Here are all the fossil Pokemon (as of November 2015):
Yes You Can Get A Pikachu In Pokemon X and Y.
Jaw Fossil is a type of fossil in Pokémon X and Y that can be revived into the Pokémon Tyrunt, a Rock/Ice-type dinosaur-like Pokémon. Players can obtain the Jaw Fossil in the game and take it to a specific location, where it can be transformed into Tyrunt. This Pokémon is known for its strong jaw and teeth, reflecting its fossil origins.
The Legendary Pokemon available in Pokemon X/Y are:Xerneas (X only)Yveltal (Y only)ArticunoZapdosMoltresMewtwoZygarde
Pokemon X and Y are sold at MSRP of $39.99 (CAD)
No, you can only pick one per version. You will need to trade for the other fossil Pokemon to complete the collection in Kalos. The Sail Fossil is Amaura, the Rock/Ice-type Pokemon, and the Jaw Fossil is Tyrunt, the Rock/Dragon-type Pokemon.
In X and Y, The Fossils can be revived in the Fossil Lab in Ambrette Town. !!
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Prof. Sycamore will give you the oval charm in Pokemon X and Y.
Pokemon capable of learning Psywave as an Egg Move in Pokemon X and Y are Latios (Pokemon) and Gastly (Pokemon).
I believe X is stronger, but Y looks cooler.
*Mew is not catchable in Pokemon x and y, but you can get him online from wondertrades and such. Mewtwo however, is catchable and you can find him in the cave in pokemon village.
You can't a pokemon from x or y version into pokemon b,w,b2,w2 because mega evoulution,new pokemon and the new type, fairy,but you can put pokemon from b,w,b2,w2 into x and y using pokemon bank and pokemon transport