a note on all these stats: unless otherwise noted the lower number for each stat is the base it would take to have the shown stat with 252 evs and 31 ivs... obviously this means the stat will almost certainly not be this low, especially for low level mons. In general it also means you can assume most stats will be significantly closer to the upper bound than the lower one, as you cant have max evs in every stat.
not sure if any of these have been posted yet but, based on the l36 froakievo and l19 hawlucha pictures, stats are:
67-84/90-107/67-84/64-81/56-73/104-121 for hawlucha IF FRESHLY CAUGHT
35-84/59-107/35-84/32-81/27-73/72-121 for hawlucha if it wasnt, because it coudl have any number of evs (although the bottom number are very unlikely because high ev counts at level 19 would be odd to say the least)
final evo of froakies stats: 41-88, 55-102, 35-83, 72-119, 27-74, 87-134
so basically hawlucha looks a lock for a solid nu mon at worst, any possible hawlucha evo looks VERY strong and froakie's evo looks like a worse sceptile stat wise
edits:
58-105/68-116/83-131/44-91/41-90/33-81 for chesnaught as per
http://i.imgur.com/rBkGKvf.jpg
tyrunt as per
https://images.4chan.org/vp/src/1380759185187.jpg
assuming no more than 20 evs in any stat: 47-67/85-104/77-97/42-62/30-49/47-67, as its level 20 and has some exp, but not much, so not many battles
62-82/40-59/37-57/62-82/47-67/30-49 on amaura as per
https://images.4chan.org/vp/src/1380759402068.png same assumptions as tyrunt given we cant see exp bar
ah and since i cant even assume really low evs on heliolisk, my ranges are a bit broader, but its
23-71/43-93/7-55/79-127/61-109/55-103
as per
http://i.imgur.com/cXZKB9U.jpg
41-90/38-87/16-65/25-74/56-103/63-112 stats for furfrou as per
https://1-media-cdn.foolz.us/ffuuka/board/vp/image/1380/74/1380747439948.jpg although again due to low level stats are most likely much closer to upper bound
doublade stats: 18-65/72-122/118-165/16-64/6-54/1-41 as per
http://i.imgur.com/VKBwA0Q.jpg
for megavenu it seems a safe assumption that hp is still base 80, which takes approximately 40 evs and perfect ivs (or a few more evs and less ivs), so in general that is the number to be looking for, which will tend to be about 30 points below my maximum bound if its a neutral nature, 15 below with a - nature, and 45 below with a + nature. That said, heregoes: 80/63-137/73-149/73-149/60-134/51-122
this is from
http://i.imgur.com/Jn4fr97.jpg which doesnt show nature, hence the bigger bounds
pangoro stats 68-115/98-145/43-91/41-88/39-87/32-79 from
http://i.imgur.com/8b0NYsz.jpeg
carbink 35-52/48-65/144-160/35-52/144-160/42-58 assuming
http://images.4chan.org/vp/src/1380845363265.jpg is freshly caught
oh jesus as per
http://i.imgur.com/UjlSEyK.png megablastoise has stats of
79/102-103/119-120/133-136/114-115/78
this gives it 625-631 bst, it seems likely it will be 79/103/120/135/115/78 to give exactly 100 bst increase, and nice round numbers for each stat increase (+0/+20/+20/+50/+20/+0)