A little X/Y question

[Mother/EarthBound Collection]

What old generation Pokemon are in X and Y? I found a spot with some guesses while I was looking to see if X and Y differ in the PokeRoster (which I still don't know) and I found that some were seen in the trailer and it listed Pokemon like Squirtle, Blastoise, Charmander, Charmeleon, Charizard, Eevee and all of it's forms, and more, but does anybody know for sure? I'd like to use some Pokemon I know and love too! And do X and Y differ in the Pokemon the games have?

 

[Shoutmon]

Caterpie,Pikachu,Pidgey,Dratini,
and I think Ratata are some Kanto pokemon that will be in the wild.I'm not sure if it differs from each version though.

 

[Mother/EarthBound Collection]

okay thanks.

 

[Dark Young Link]

Will Dratini be in Pokemon Y or has that not been revealed yet. If I could get one in the wild, that would be perfect.

 

[Artisan Vistra]

IDK but they are in gen 5 if you look hard enough. (Or at least somewhere by DST hint hint)

 

[tdimodel6]

I did see a Zigzagoon or Linoone whichever one it was on the Kalos pokedex in CoroCoro scans