Legendaries are considered to be "static" Pokemon. They don't get any changes between games, only the option to become a different form. It's always been this way.
I suppose it's possible that those guys will show up in different Formes, though. Or possibly even Mega Evolutions like Mewtwo. --- Socran's Razor: "Never attribute to massive stupidity by someone else, what could be explained by a tiny bit of stupidity on your own part."
Didn't jayman said that it resulted as a glitch in the gts database with them leaving out the updates of the lake trio? He also said that Whimsicott was listed pure Grass when he first searched for it but was listed as Fairy the 2nd try. I have a feeling that they are Fairy within X/Y's ingame data, but not the global link site since they can update it with some changes. Im not taking this to account until I see an ingame image of one of them with their types shown(which probably won't be seen until the next 2 months). --- Freiza may be cool, but his brother is..... COOLER(get it?) 3DS FC:0645-6947-9076