Personally for the pokemon's types (at least fully evolved), I think:
Chespin: Grass/Figthing? Grass/Dark? I'm not really sure.
Fennekin: Fire/Psychic (finally no Fire/Fighting!!!!!)
Froakie: Water/something. I have no clue.
Y legendary: Dark/Flying, but Fire/Flying isn't impossible.
X legendary: Grass/Steel, Grass/Psychic, etc. Think the same as you guys.
I really love Fennekin and the X legendary! I already know which game to get and which starter to use XD.