If there are any dragon like familiars then they are proably part of the Dracones group of familairs. Only seen pics of three members of this type but assuming there should be plent more that might work for you.
Here is a link to get look at the Dracones and the others we can get info on http://g-ecx.images-amazon.com/images/G/01/video-games/AmazonPreOrder1_NiNoKuni2.pdf
There is one evolutionary chain of straight-up dragon.
Is there a pic of the this line? I admit i'm big on dragons myself so want to keep an eye out of it.
Base form: http://02memo.up.seesaa.net/image/E4BA8CE3838EE59BBD20E799BDE3818DE88196E781B0E381AEE5A5B3E78E8B205-4.jpg Second form: http://nobuzouman.cocolog-nifty.com/photos/uncategorized/2011/11/21/nino_ps77_2.png Third form (1): http://t1.gstatic.com/images?q=tbn:ANd9GcR01ChoPyqMG_uP1KHoFfpUjkQ7KNmDPd9zm0D3wO-PHZ-p0ZfCRsIrhHp-XA Third form (2): I could only find the gold version: http://tama1985.files.wordpress.com/2012/03/404_e3838de383abe38389e383a9e383b3.jpg