Heh. Well well! I wasn't hoping for a critique already. xDDD Glad you took the time.
To be honest, I didn't really plan much of anything when I drew them (most of the time I just doodle shapes and then something just hits me) and they were pretty much dry runs since I'm trying to recover from an art block. >.< However, you did point out many things that I've already taken into mind.
On Illuseon's part, I know that it looks extremely like Flareon. xDDD Believe me my friends have choked it to death and I am still formulating a better design for it. It's just not coming out very well as I'd expect it. D: But I have been thinking of making it into some form of half spirit so that thought's still swirling in my head. I just need a more solid design is all.
On Rageon, usually it takes me a while to notice things that are out of proportion or look weird so you caught a couple of things such as the tooth. The back wing actually (I assumed you missed my notes comment on DA) wasn't finished yet and I was still drawing it in. :D Usually when I draw, I just draw instead of use models because i don't want to lose the idea that's been sitting in my head and so that's why all the proportions look like crap somewhat. ^^; I can't keep a good image in my head for long which is one of my weaker points.
Aerieleon, yeah I know flying types have some sort of dragon/bat/feathered wings of some sort but I just wanted to try a pair of wings made up of... down(?) was it? It was fun to do and I just didn't want to go back and erase it all. :3 It's tail.... I was thinking of how airplanes use their back wings to turn their planes and so I took that idea and implemented it into the use of a double tail. Probably not the best idea but I was lacking creativity at the time.
But yeah. I do look at some references but not as much as I would like. If in the future I would expand more on these, I'm sure I'd do much more research. Thanks for the critique. I'll be sure to note it somewhere on my notepad for future use. *thumbsup*