It's awesome to have images of every Pokémon so soon. Thanks to those involved in getting them.
I guess now I'll just comment on the ones I find interesting:
My opinion on Daikenki has changed a bit after seeing its sprites. It's definitely now my favorite of all the final starter stages, meaning this'll be the third generation in a row that I start with the Water starter. Its base stats are nice, as well.
Yorterrie's line is interesting... That's about all I can say about that. xD Reparudasu looks nice. Out of the final stages of the Monkey trio, Yanakki is definitely my favorite. Zebraika is awesome.
The Kurumiru line is by far my favorite of all bug-cocoon-final bug Pokémon lines. Kurumayu is just adorable and grumpy. I love it. xD
The Meguroko line is amazing, as well. There's absolutely no way I would change any of Meguroko's evolutions. They're that cool.
Hihidaruma with 140 base Attack and 95 base Speed is just... Whoa. Abagoora and Aakeosu are nice Fossil Pokémon - I'm currently unsure of which one I like more.
The Gear line is just... I can't complain because of what they did with Dugtrio and Magneton, but... Blargh. They're just so odd.
Shibirudon is awesome. Being pure Electric-Type with Levitate is so cool. Hopefully its movepool is nice, because I want to train one. Kirikizan is also awesome, though its base 70 Speed leaves a bit to be desired.
Kuitaran is... Weird? It looks cool, but I'm not sure what it's supposed to be. Oh, I see. Anteater that eats Aianto. I'm going to need to see the official art for Sazando before I can really form an opinion on its looks, because I don't think the sprite is doing it justice. Urugamosu is cool.
Torunerosu, Borutorosu, and Randorosu are all... Odd. I don't like how they're in the exact same pose, but whatever. Maybe they move differently.
Kyuremu looks amazing, though my opinion on it might change once official art is released. Kerudio and Meroetta are interesting.
Genosetko... I don't even know how to comment on it. Lately, the final Pokémon in the Dex have felt powerful, like Deoxys and Arceus. This thing, at this point in time, is just odd to me. I'm sure my opinion on it will change once we find out what it actually is.
The base stat distribution in this generation seems to be very nice, for the most part. A lot of the offensive Pokémon seem pretty awesome base stat-wise.